AnatomyDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsInformation ScienceNamed GroupsHealth Care
ElectroencephalographyBrain WavesMagnetoencephalographyEpilepsies, PartialEpilepsyAlpha RhythmSeizuresSignal Processing, Computer-AssistedBrain MappingDelta RhythmBrainMagnetic Resonance ImagingCerebral CortexEvoked PotentialsBeta RhythmEvoked Potentials, VisualEvoked Potentials, SomatosensoryCortical SynchronizationStatus EpilepticusMonitoring, PhysiologicBrain-Computer InterfacesEvent-Related Potentials, P300Term BirthPersistent Vegetative StateScalpElectrooculographyEpilepsy, Frontal LobeSpasms, InfantileSleep StagesEpilepsy, GeneralizedConsciousness DisordersElectrodes, ImplantedSleepMonitoring, IntraoperativeEpilepsy, Tonic-ClonicArtifactsAnticonvulsantsReaction TimeEpilepsy, AbsenceWakefulnessCommunication Aids for DisabledPhotic StimulationTranscranial Magnetic StimulationElectrodesEpilepsy, Temporal LobeOccipital LobeEvoked Potentials, AuditoryEpilepsy, ReflexFunctional LateralityConsciousness MonitorsImage Processing, Computer-AssistedModels, NeurologicalHypoxia-Ischemia, BrainUnconsciousnessPsychomotor PerformanceMalformations of Cortical DevelopmentParietal LobeFrontal LobeEpilepsy, Complex PartialConsciousnessTheta RhythmContingent Negative VariationNerve NetBrain DiseasesElectroencephalography Phase SynchronizationAcoustic StimulationAnticipation, PsychologicalAttentionCognitionPoint-of-Care SystemsComaElectromyographyVisual PerceptionSleep DeprivationNeuropsychological TestsDiagnosis, Computer-AssistedSpectroscopy, Near-InfraredVideo RecordingUnnecessary ProceduresNeuroimagingArousalMotor CortexTemporal LobeAuditory PerceptionDiscriminant AnalysisNeurologic ExaminationCerebrovascular CirculationTime FactorsSleep, REMBrain IschemiaHeadNeural PathwaysAlgorithmsBehaviorEndarterectomy, CarotidInfant, NewbornAnalysis of VarianceReproducibility of ResultsHallucinationsHypothermia, InducedFourier AnalysisTask Performance and AnalysisMovementOxygenMemory, Short-TermSpectrum AnalysisDominance, CerebralSensitivity and SpecificityData Interpretation, StatisticalTomography, Emission-Computed, Single-PhotonPropofolBiological ClocksThalamusRetrospective StudiesAnesthetics, IntravenousHypnotics and SedativesNervous System DiseasesBrain InjuriesNeurosurgical ProceduresSchizophreniaUltrasonography, Doppler, TranscranialAuditory CortexPeriodicityPolysomnographyEvoked Potentials, MotorNonlinear DynamicsPredictive Value of TestsVisual CortexComputer SimulationPattern Recognition, VisualPrefrontal CortexProspective StudiesSomatosensory CortexCognition DisordersPositron-Emission TomographyTomography, X-Ray ComputedTreatment OutcomeUser-Computer InterfaceHippocampusDepressive Disorder, MajorEye MovementsRecognition (Psychology)Severity of Illness IndexImage Interpretation, Computer-AssistedMemoryCuesEmotionsStatistics as TopicMotor ActivityCase-Control Studies
Electroencephalography: Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.Brain Waves: Wave-like oscillations of electric potential between parts of the brain recorded by EEG.Magnetoencephalography: The measurement of magnetic fields over the head generated by electric currents in the brain. As in any electrical conductor, electric fields in the brain are accompanied by orthogonal magnetic fields. The measurement of these fields provides information about the localization of brain activity which is complementary to that provided by ELECTROENCEPHALOGRAPHY. Magnetoencephalography may be used alone or together with electroencephalography, for measurement of spontaneous or evoked activity, and for research or clinical purposes.Epilepsies, Partial: Conditions characterized by recurrent paroxysmal neuronal discharges which arise from a focal region of the brain. Partial seizures are divided into simple and complex, depending on whether consciousness is unaltered (simple partial seizure) or disturbed (complex partial seizure). Both types may feature a wide variety of motor, sensory, and autonomic symptoms. Partial seizures may be classified by associated clinical features or anatomic location of the seizure focus. A secondary generalized seizure refers to a partial seizure that spreads to involve the brain diffusely. (From Adams et al., Principles of Neurology, 6th ed, pp317)Epilepsy: A disorder characterized by recurrent episodes of paroxysmal brain dysfunction due to a sudden, disorderly, and excessive neuronal discharge. Epilepsy classification systems are generally based upon: (1) clinical features of the seizure episodes (e.g., motor seizure), (2) etiology (e.g., post-traumatic), (3) anatomic site of seizure origin (e.g., frontal lobe seizure), (4) tendency to spread to other structures in the brain, and (5) temporal patterns (e.g., nocturnal epilepsy). (From Adams et al., Principles of Neurology, 6th ed, p313)Alpha Rhythm: Brain waves characterized by a relatively high voltage or amplitude and a frequency of 8-13 Hz. They constitute the majority of waves recorded by EEG registering the activity of the parietal and occipital lobes when the individual is awake, but relaxed with the eyes closed.Seizures: Clinical or subclinical disturbances of cortical function due to a sudden, abnormal, excessive, and disorganized discharge of brain cells. Clinical manifestations include abnormal motor, sensory and psychic phenomena. Recurrent seizures are usually referred to as EPILEPSY or "seizure disorder."Signal Processing, Computer-Assisted: Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.Brain Mapping: Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.Delta Rhythm: Brain waves seen on EEG characterized by a high amplitude and a frequency of 4 Hz and below. They are considered the "deep sleep waves" observed during sleep in dreamless states, infancy, and in some brain disorders.Brain: The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.Magnetic Resonance Imaging: Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.Cerebral Cortex: The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulchi. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.Evoked Potentials: Electrical responses recorded from nerve, muscle, SENSORY RECEPTOR, or area of the CENTRAL NERVOUS SYSTEM following stimulation. They range from less than a microvolt to several microvolts. The evoked potential can be auditory (EVOKED POTENTIALS, AUDITORY), somatosensory (EVOKED POTENTIALS, SOMATOSENSORY), visual (EVOKED POTENTIALS, VISUAL), or motor (EVOKED POTENTIALS, MOTOR), or other modalities that have been reported.Beta Rhythm: Brain waves with frequency between 15-30 Hz seen on EEG during wakefulness and mental activity.Evoked Potentials, Visual: The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.Evoked Potentials, Somatosensory: The electric response evoked in the CEREBRAL CORTEX by stimulation along AFFERENT PATHWAYS from PERIPHERAL NERVES to CEREBRUM.Cortical Synchronization: EEG phase synchronization of the cortical brain region (CEREBRAL CORTEX).Status Epilepticus: A prolonged seizure or seizures repeated frequently enough to prevent recovery between episodes occurring over a period of 20-30 minutes. The most common subtype is generalized tonic-clonic status epilepticus, a potentially fatal condition associated with neuronal injury and respiratory and metabolic dysfunction. Nonconvulsive forms include petit mal status and complex partial status, which may manifest as behavioral disturbances. Simple partial status epilepticus consists of persistent motor, sensory, or autonomic seizures that do not impair cognition (see also EPILEPSIA PARTIALIS CONTINUA). Subclinical status epilepticus generally refers to seizures occurring in an unresponsive or comatose individual in the absence of overt signs of seizure activity. (From N Engl J Med 1998 Apr 2;338(14):970-6; Neurologia 1997 Dec;12 Suppl 6:25-30)Monitoring, Physiologic: The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine.Brain-Computer Interfaces: Instrumentation consisting of hardware and software that communicates with the BRAIN. The hardware component of the interface records brain signals, while the software component analyzes the signals and converts them into a command that controls a device or sends a feedback signal to the brain.Event-Related Potentials, P300: A late-appearing component of the event-related potential. P300 stands for a positive deflection in the event-related voltage potential at 300 millisecond poststimulus. Its amplitude increases with unpredictable, unlikely, or highly significant stimuli and thereby constitutes an index of mental activity. (From Campbell, Psychiatric Dictionary, 6th ed)Term Birth: CHILDBIRTH at the end of a normal duration of PREGNANCY, between 37 to 40 weeks of gestation or about 280 days from the first day of the mother's last menstrual period.Persistent Vegetative State: Vegetative state refers to the neurocognitive status of individuals with severe brain damage, in whom physiologic functions (sleep-wake cycles, autonomic control, and breathing) persist, but awareness (including all cognitive function and emotion) is abolished.Scalp: The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL).Electrooculography: Recording of the average amplitude of the resting potential arising between the cornea and the retina in light and dark adaptation as the eyes turn a standard distance to the right and the left. The increase in potential with light adaptation is used to evaluate the condition of the retinal pigment epithelium.Epilepsy, Frontal Lobe: A localization-related (focal) form of epilepsy characterized by seizures which arise in the FRONTAL LOBE. A variety of clinical syndromes exist depending on the exact location of the seizure focus. Frontal lobe seizures may be idiopathic (cryptogenic) or caused by an identifiable disease process such as traumatic injuries, neoplasms, or other macroscopic or microscopic lesions of the frontal lobes (symptomatic frontal lobe seizures). (From Adams et al., Principles of Neurology, 6th ed, pp318-9)Spasms, Infantile: An epileptic syndrome characterized by the triad of infantile spasms, hypsarrhythmia, and arrest of psychomotor development at seizure onset. The majority present between 3-12 months of age, with spasms consisting of combinations of brief flexor or extensor movements of the head, trunk, and limbs. The condition is divided into two forms: cryptogenic (idiopathic) and symptomatic (secondary to a known disease process such as intrauterine infections; nervous system abnormalities; BRAIN DISEASES, METABOLIC, INBORN; prematurity; perinatal asphyxia; TUBEROUS SCLEROSIS; etc.). (From Menkes, Textbook of Child Neurology, 5th ed, pp744-8)Sleep Stages: Periods of sleep manifested by changes in EEG activity and certain behavioral correlates; includes Stage 1: sleep onset, drowsy sleep; Stage 2: light sleep; Stages 3 and 4: delta sleep, light sleep, deep sleep, telencephalic sleep.Epilepsy, Generalized: Recurrent conditions characterized by epileptic seizures which arise diffusely and simultaneously from both hemispheres of the brain. Classification is generally based upon motor manifestations of the seizure (e.g., convulsive, nonconvulsive, akinetic, atonic, etc.) or etiology (e.g., idiopathic, cryptogenic, and symptomatic). (From Mayo Clin Proc, 1996 Apr;71(4):405-14)Consciousness Disorders: Organic mental disorders in which there is impairment of the ability to maintain awareness of self and environment and to respond to environmental stimuli. Dysfunction of the cerebral hemispheres or brain stem RETICULAR FORMATION may result in this condition.Electrodes, Implanted: Surgically placed electric conductors through which ELECTRIC STIMULATION is delivered to or electrical activity is recorded from a specific point inside the body.Sleep: A readily reversible suspension of sensorimotor interaction with the environment, usually associated with recumbency and immobility.Monitoring, Intraoperative: The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).Epilepsy, Tonic-Clonic: A generalized seizure disorder characterized by recurrent major motor seizures. The initial brief tonic phase is marked by trunk flexion followed by diffuse extension of the trunk and extremities. The clonic phase features rhythmic flexor contractions of the trunk and limbs, pupillary dilation, elevations of blood pressure and pulse, urinary incontinence, and tongue biting. This is followed by a profound state of depressed consciousness (post-ictal state) which gradually improves over minutes to hours. The disorder may be cryptogenic, familial, or symptomatic (caused by an identified disease process). (From Adams et al., Principles of Neurology, 6th ed, p329)Artifacts: Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.Anticonvulsants: Drugs used to prevent SEIZURES or reduce their severity.Reaction Time: The time from the onset of a stimulus until a response is observed.Epilepsy, Absence: A childhood seizure disorder characterized by rhythmic electrical brain discharges of generalized onset. Clinical features include a sudden cessation of ongoing activity usually without loss of postural tone. Rhythmic blinking of the eyelids or lip smacking frequently accompanies the SEIZURES. The usual duration is 5-10 seconds, and multiple episodes may occur daily. Juvenile absence epilepsy is characterized by the juvenile onset of absence seizures and an increased incidence of myoclonus and tonic-clonic seizures. (Menkes, Textbook of Child Neurology, 5th ed, p736)Wakefulness: A state in which there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.Communication Aids for Disabled: Equipment that provides mentally or physically disabled persons with a means of communication. The aids include display boards, typewriters, cathode ray tubes, computers, and speech synthesizers. The output of such aids includes written words, artificial speech, language signs, Morse code, and pictures.Photic Stimulation: Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.Transcranial Magnetic Stimulation: A technique that involves the use of electrical coils on the head to generate a brief magnetic field which reaches the CEREBRAL CORTEX. It is coupled with ELECTROMYOGRAPHY response detection to assess cortical excitability by the threshold required to induce MOTOR EVOKED POTENTIALS. This method is also used for BRAIN MAPPING, to study NEUROPHYSIOLOGY, and as a substitute for ELECTROCONVULSIVE THERAPY for treating DEPRESSION. Induction of SEIZURES limits its clinical usage.Electrodes: Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.Epilepsy, Temporal Lobe: A localization-related (focal) form of epilepsy characterized by recurrent seizures that arise from foci within the temporal lobe, most commonly from its mesial aspect. A wide variety of psychic phenomena may be associated, including illusions, hallucinations, dyscognitive states, and affective experiences. The majority of complex partial seizures (see EPILEPSY, COMPLEX PARTIAL) originate from the temporal lobes. Temporal lobe seizures may be classified by etiology as cryptogenic, familial, or symptomatic (i.e., related to an identified disease process or lesion). (From Adams et al., Principles of Neurology, 6th ed, p321)Occipital Lobe: Posterior portion of the CEREBRAL HEMISPHERES responsible for processing visual sensory information. It is located posterior to the parieto-occipital sulcus and extends to the preoccipital notch.Evoked Potentials, Auditory: The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.Epilepsy, Reflex: A subtype of epilepsy characterized by seizures that are consistently provoked by a certain specific stimulus. Auditory, visual, and somatosensory stimuli as well as the acts of writing, reading, eating, and decision making are examples of events or activities that may induce seizure activity in affected individuals. (From Neurol Clin 1994 Feb;12(1):57-8)Functional Laterality: Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.Consciousness Monitors: Devices used to assess the level of consciousness especially during anesthesia. They measure brain activity level based on the EEG.Image Processing, Computer-Assisted: A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.Models, Neurological: Theoretical representations that simulate the behavior or activity of the neurological system, processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.Hypoxia-Ischemia, Brain: A disorder characterized by a reduction of oxygen in the blood combined with reduced blood flow (ISCHEMIA) to the brain from a localized obstruction of a cerebral artery or from systemic hypoperfusion. Prolonged hypoxia-ischemia is associated with ISCHEMIC ATTACK, TRANSIENT; BRAIN INFARCTION; BRAIN EDEMA; COMA; and other conditions.Unconsciousness: Loss of the ability to maintain awareness of self and environment combined with markedly reduced responsiveness to environmental stimuli. (From Adams et al., Principles of Neurology, 6th ed, pp344-5)Psychomotor Performance: The coordination of a sensory or ideational (cognitive) process and a motor activity.Malformations of Cortical Development: Abnormalities in the development of the CEREBRAL CORTEX. These include malformations arising from abnormal neuronal and glial CELL PROLIFERATION or APOPTOSIS (Group I); abnormal neuronal migration (Group II); and abnormal establishment of cortical organization (Group III). Many INBORN METABOLIC BRAIN DISORDERS affecting CNS formation are often associated with cortical malformations. They are common causes of EPILEPSY and developmental delay.Parietal Lobe: Upper central part of the cerebral hemisphere. It is located posterior to central sulcus, anterior to the OCCIPITAL LOBE, and superior to the TEMPORAL LOBES.Frontal Lobe: The part of the cerebral hemisphere anterior to the central sulcus, and anterior and superior to the lateral sulcus.Epilepsy, Complex Partial: A disorder characterized by recurrent partial seizures marked by impairment of cognition. During the seizure the individual may experience a wide variety of psychic phenomenon including formed hallucinations, illusions, deja vu, intense emotional feelings, confusion, and spatial disorientation. Focal motor activity, sensory alterations and AUTOMATISM may also occur. Complex partial seizures often originate from foci in one or both temporal lobes. The etiology may be idiopathic (cryptogenic partial complex epilepsy) or occur as a secondary manifestation of a focal cortical lesion (symptomatic partial complex epilepsy). (From Adams et al., Principles of Neurology, 6th ed, pp317-8)Consciousness: Sense of awareness of self and of the environment.Theta Rhythm: Brain waves characterized by a frequency of 4-7 Hz, usually observed in the temporal lobes when the individual is awake, but relaxed and sleepy.Contingent Negative Variation: A negative shift of the cortical electrical potentials that increases over time. It is associated with an anticipated response to an expected stimulus and is an electrical event indicative of a state of readiness or expectancy.Nerve Net: A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction or joined to one another by cytoplasmic processes. In invertebrates, for example, the nerve net allows nerve impulses to spread over a wide area of the net because synapses can pass information in any direction.Brain Diseases: Pathologic conditions affecting the BRAIN, which is composed of the intracranial components of the CENTRAL NERVOUS SYSTEM. This includes (but is not limited to) the CEREBRAL CORTEX; intracranial white matter; BASAL GANGLIA; THALAMUS; HYPOTHALAMUS; BRAIN STEM; and CEREBELLUM.Electroencephalography Phase Synchronization: Adjustment of BRAIN WAVES from two or more neuronal groups within or across a brain structure (e.g., cortical and limbic brain structures) to become uniform in EEG oscillation patterns in response to a stimulus. It is interpreted as a brain integration sign during many processes such as learning, memory, and perception and involves reciprocal neural connections.Acoustic Stimulation: Use of sound to elicit a response in the nervous system.Anticipation, Psychological: The ability to foresee what is likely to happen on the basis of past experience. It is largely a frontal lobe function.Attention: Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating.Cognition: Intellectual or mental process whereby an organism obtains knowledge.Point-of-Care Systems: Laboratory and other services provided to patients at the bedside. These include diagnostic and laboratory testing using automated information entry.Coma: A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem RETICULAR FORMATION.Electromyography: Recording of the changes in electric potential of muscle by means of surface or needle electrodes.Visual Perception: The selecting and organizing of visual stimuli based on the individual's past experience.Sleep Deprivation: The state of being deprived of sleep under experimental conditions, due to life events, or from a wide variety of pathophysiologic causes such as medication effect, chronic illness, psychiatric illness, or sleep disorder.Neuropsychological Tests: Tests designed to assess neurological function associated with certain behaviors. They are used in diagnosing brain dysfunction or damage and central nervous system disorders or injury.Diagnosis, Computer-Assisted: Application of computer programs designed to assist the physician in solving a diagnostic problem.Spectroscopy, Near-Infrared: A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition.Video Recording: The storing or preserving of video signals for television to be played back later via a transmitter or receiver. Recordings may be made on magnetic tape or discs (VIDEODISC RECORDING).Unnecessary Procedures: Diagnostic, therapeutic, and investigative procedures prescribed and performed by health professionals, the results of which do not justify the benefits or hazards and costs to the patient.Neuroimaging: Non-invasive methods of visualizing the CENTRAL NERVOUS SYSTEM, especially the brain, by various imaging modalities.Arousal: Cortical vigilance or readiness of tone, presumed to be in response to sensory stimulation via the reticular activating system.Motor Cortex: Area of the FRONTAL LOBE concerned with primary motor control located in the dorsal PRECENTRAL GYRUS immediately anterior to the central sulcus. It is comprised of three areas: the primary motor cortex located on the anterior paracentral lobule on the medial surface of the brain; the premotor cortex located anterior to the primary motor cortex; and the supplementary motor area located on the midline surface of the hemisphere anterior to the primary motor cortex.Temporal Lobe: Lower lateral part of the cerebral hemisphere responsible for auditory, olfactory, and semantic processing. It is located inferior to the lateral fissure and anterior to the OCCIPITAL LOBE.Auditory Perception: The process whereby auditory stimuli are selected, organized, and interpreted by the organism.Discriminant Analysis: A statistical analytic technique used with discrete dependent variables, concerned with separating sets of observed values and allocating new values. It is sometimes used instead of regression analysis.Neurologic Examination: Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.Cerebrovascular Circulation: The circulation of blood through the BLOOD VESSELS of the BRAIN.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Sleep, REM: A stage of sleep characterized by rapid movements of the eye and low voltage fast pattern EEG. It is usually associated with dreaming.Brain Ischemia: Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION.Head: The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.Neural Pathways: Neural tracts connecting one part of the nervous system with another.Algorithms: A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.Behavior: The observable response of a man or animal to a situation.Endarterectomy, Carotid: The excision of the thickened, atheromatous tunica intima of a carotid artery.Infant, Newborn: An infant during the first month after birth.Analysis of Variance: A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.Hallucinations: Subjectively experienced sensations in the absence of an appropriate stimulus, but which are regarded by the individual as real. They may be of organic origin or associated with MENTAL DISORDERS.Hypothermia, Induced: Abnormally low BODY TEMPERATURE that is intentionally induced in warm-blooded animals by artificial means. In humans, mild or moderate hypothermia has been used to reduce tissue damages, particularly after cardiac or spinal cord injuries and during subsequent surgeries.Fourier Analysis: Analysis based on the mathematical function first formulated by Jean-Baptiste-Joseph Fourier in 1807. The function, known as the Fourier transform, describes the sinusoidal pattern of any fluctuating pattern in the physical world in terms of its amplitude and its phase. It has broad applications in biomedicine, e.g., analysis of the x-ray crystallography data pivotal in identifying the double helical nature of DNA and in analysis of other molecules, including viruses, and the modified back-projection algorithm universally used in computerized tomography imaging, etc. (From Segen, The Dictionary of Modern Medicine, 1992)Task Performance and Analysis: The detailed examination of observable activity or behavior associated with the execution or completion of a required function or unit of work.Movement: The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.Oxygen: An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.Memory, Short-Term: Remembrance of information for a few seconds to hours.Spectrum Analysis: The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Dominance, Cerebral: Dominance of one cerebral hemisphere over the other in cerebral functions.Sensitivity and Specificity: Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)Data Interpretation, Statistical: Application of statistical procedures to analyze specific observed or assumed facts from a particular study.Tomography, Emission-Computed, Single-Photon: A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.Propofol: An intravenous anesthetic agent which has the advantage of a very rapid onset after infusion or bolus injection plus a very short recovery period of a couple of minutes. (From Smith and Reynard, Textbook of Pharmacology, 1992, 1st ed, p206). Propofol has been used as ANTICONVULSANTS and ANTIEMETICS.Biological Clocks: The physiological mechanisms that govern the rhythmic occurrence of certain biochemical, physiological, and behavioral phenomena.Thalamus: Paired bodies containing mostly GRAY MATTER and forming part of the lateral wall of the THIRD VENTRICLE of the brain.Retrospective Studies: Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.Anesthetics, Intravenous: Ultrashort-acting anesthetics that are used for induction. Loss of consciousness is rapid and induction is pleasant, but there is no muscle relaxation and reflexes frequently are not reduced adequately. Repeated administration results in accumulation and prolongs the recovery time. Since these agents have little if any analgesic activity, they are seldom used alone except in brief minor procedures. (From AMA Drug Evaluations Annual, 1994, p174)Hypnotics and Sedatives: Drugs used to induce drowsiness or sleep or to reduce psychological excitement or anxiety.Nervous System Diseases: Diseases of the central and peripheral nervous system. This includes disorders of the brain, spinal cord, cranial nerves, peripheral nerves, nerve roots, autonomic nervous system, neuromuscular junction, and muscle.Brain Injuries: Acute and chronic (see also BRAIN INJURIES, CHRONIC) injuries to the brain, including the cerebral hemispheres, CEREBELLUM, and BRAIN STEM. Clinical manifestations depend on the nature of injury. Diffuse trauma to the brain is frequently associated with DIFFUSE AXONAL INJURY or COMA, POST-TRAUMATIC. Localized injuries may be associated with NEUROBEHAVIORAL MANIFESTATIONS; HEMIPARESIS, or other focal neurologic deficits.Neurosurgical Procedures: Surgery performed on the nervous system or its parts.Schizophrenia: A severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, HALLUCINATIONS, emotional disharmony, and regressive behavior.Ultrasonography, Doppler, Transcranial: A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.Auditory Cortex: The region of the cerebral cortex that receives the auditory radiation from the MEDIAL GENICULATE BODY.Periodicity: The tendency of a phenomenon to recur at regular intervals; in biological systems, the recurrence of certain activities (including hormonal, cellular, neural) may be annual, seasonal, monthly, daily, or more frequently (ultradian).Polysomnography: Simultaneous and continuous monitoring of several parameters during sleep to study normal and abnormal sleep. The study includes monitoring of brain waves, to assess sleep stages, and other physiological variables such as breathing, eye movements, and blood oxygen levels which exhibit a disrupted pattern with sleep disturbances.Evoked Potentials, Motor: The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.Nonlinear Dynamics: The study of systems which respond disproportionately (nonlinearly) to initial conditions or perturbing stimuli. Nonlinear systems may exhibit "chaos" which is classically characterized as sensitive dependence on initial conditions. Chaotic systems, while distinguished from more ordered periodic systems, are not random. When their behavior over time is appropriately displayed (in "phase space"), constraints are evident which are described by "strange attractors". Phase space representations of chaotic systems, or strange attractors, usually reveal fractal (FRACTALS) self-similarity across time scales. Natural, including biological, systems often display nonlinear dynamics and chaos.Predictive Value of Tests: In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.Visual Cortex: Area of the OCCIPITAL LOBE concerned with the processing of visual information relayed via VISUAL PATHWAYS.Computer Simulation: Computer-based representation of physical systems and phenomena such as chemical processes.Pattern Recognition, Visual: Mental process to visually perceive a critical number of facts (the pattern), such as characters, shapes, displays, or designs.Prefrontal Cortex: The rostral part of the frontal lobe, bounded by the inferior precentral fissure in humans, which receives projection fibers from the MEDIODORSAL NUCLEUS OF THE THALAMUS. The prefrontal cortex receives afferent fibers from numerous structures of the DIENCEPHALON; MESENCEPHALON; and LIMBIC SYSTEM as well as cortical afferents of visual, auditory, and somatic origin.Prospective Studies: Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.Somatosensory Cortex: Area of the parietal lobe concerned with receiving sensations such as movement, pain, pressure, position, temperature, touch, and vibration. It lies posterior to the central sulcus.Cognition Disorders: Disturbances in mental processes related to learning, thinking, reasoning, and judgment.Positron-Emission Tomography: An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.User-Computer Interface: The portion of an interactive computer program that issues messages to and receives commands from a user.Hippocampus: A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation.Depressive Disorder, Major: Marked depression appearing in the involution period and characterized by hallucinations, delusions, paranoia, and agitation.Eye Movements: Voluntary or reflex-controlled movements of the eye.Recognition (Psychology): The knowledge or perception that someone or something present has been previously encountered.Severity of Illness Index: Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Memory: Complex mental function having four distinct phases: (1) memorizing or learning, (2) retention, (3) recall, and (4) recognition. Clinically, it is usually subdivided into immediate, recent, and remote memory.Cues: Signals for an action; that specific portion of a perceptual field or pattern of stimuli to which a subject has learned to respond.Emotions: Those affective states which can be experienced and have arousing and motivational properties.Statistics as Topic: The science and art of collecting, summarizing, and analyzing data that are subject to random variation. The term is also applied to the data themselves and to the summarization of the data.Motor Activity: The physical activity of a human or an animal as a behavioral phenomenon.Case-Control Studies: Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.

Physiological properties of raphe magnus neurons during sleep and waking. (1/10381)

Neurons in the medullary raphe magnus (RM) that are important in the descending modulation of nociceptive transmission are classified by their response to noxious tail heat as ON, OFF, or NEUTRAL cells. Experiments in anesthetized animals demonstrate that RM ON cells facilitate and OFF cells inhibit nociceptive transmission. Yet little is known of the physiology of these cells in the unanesthetized animal. The first aim of the present experiments was to determine whether cells with ON- and OFF-like responses to noxious heat exist in the unanesthetized rat. Second, to determine if RM cells have state-dependent discharge, the activity of RM neurons was recorded during waking and sleeping states. Noxious heat applied during waking and slow wave sleep excited one group of cells (ON-U) in unanesthetized rats. Other cells were inhibited by noxious heat (OFF-U) applied during waking and slow wave sleep states in unanesthetized rats. NEUTRAL-U cells did not respond to noxious thermal stimulation applied during either slow wave sleep or waking. ON-U and OFF-U cells were more likely to respond to noxious heat during slow wave sleep than during waking and were least likely to respond when the animal was eating or drinking. Although RM cells rarely respond to innocuous stimulation applied during anesthesia, ON-U and OFF-U cells were excited and inhibited, respectively, by innocuous somatosensory stimulation in the unanesthetized rat. The spontaneous activity of >90% of the RM neurons recorded in the unanesthetized rat was influenced by behavioral state. OFF-U cells discharged sporadically during waking but were continuously active during slow wave sleep. By contrast, ON-U and NEUTRAL-U cells discharged in bursts during waking and either ceased to discharge entirely or discharged at a low rate during slow wave sleep. We suggest that OFF cell discharge functions to suppress pain-evoked reactions during sleep, whereas ON cell discharge facilitates pain-evoked responses during waking.  (+info)

Effect of psychotropic drugs on caudate spindle in cats. (2/10381)

To ascertain whether neuroleptics act on the caudate nucleus itself, the effects of these compounds as well as other centrally acting drugs were examined in relation to caudate spindle and EEG arousal responses (sciatic nerve stimulation) in gallamine-immobilized cats. Haloperidol and chlorpromazine enhanced the caudate spindle at a dose which had no effect on the EEG arousal response. On the other hand, clozapine and a higher dose of chlorpromazine enhanced the caudate spindle, but depressed the arousal response. High frequency stimulation of the sciatic nerve suppressed the caudate spindle. Pentobarbital, biperiden and diazepam, while depressing the arousal response, caused an enhancement of the caudate spindle. Imipramine at a low dose had no effect on either response, whereas at a high dose this drug enhanced the caudate spindle with concomitant depression of the arousal response. From these results, it may be concluded that the enhancing action on the caudate spindle induced by haloperidol and a low dose of chlorpromazine is due to an increase in susceptibility of the caudate nucleus itself. In addition, it is suggested that depression of the activating system is involved in an appearance of the caudate spindle.  (+info)

Arousal from sleep shortens sympathetic burst latency in humans. (3/10381)

1. Bursts of sympathetic activity in muscle nerves are phase-locked to the cardiac cycle by the sinoaortic baroreflexes. Acoustic arousal from non-rapid eye movement (NREM) sleep reduces the normally invariant interval between the R-wave of the electrocardiogram (ECG) and the peak of the corresponding sympathetic burst; however, the effects of other forms of sleep disruption (i.e. spontaneous arousals and apnoea-induced arousals) on this temporal relationship are unknown. 2. We simultaneously recorded muscle sympathetic nerve activity in the peroneal nerve (intraneural electrodes) and the ECG (surface electrodes) in seven healthy humans and three patients with sleep apnoea syndrome during NREM sleep. 3. In seven subjects, burst latencies were shortened subsequent to spontaneous K complexes (1.297 +/- 0.024 s, mean +/- s. e.m.) and spontaneous arousals (1.268 +/- 0.044 s) compared with latencies during periods of stable NREM sleep (1.369 +/- 0.023 s). In six subjects who demonstrated spontaneous apnoeas during sleep, apnoea per se did not alter burst latency relative to sleep with stable electroencephalogram (EEG) and breathing (1.313 +/- 0.038 vs. 1.342 +/- 0.026 s); however, following apnoea-induced EEG perturbations, burst latencies were reduced (1.214 +/- 0.034 s). 4. Arousal-induced reduction in sympathetic burst latency may reflect a temporary diminution of baroreflex buffering of sympathetic outflow. If so, the magnitude of arterial pressure perturbations during sleep (e.g. those caused by sleep disordered breathing and periodic leg movements) may be augmented by arousal.  (+info)

Overexpression of a Shaker-type potassium channel in mammalian central nervous system dysregulates native potassium channel gene expression. (4/10381)

The nervous system maintains a delicate balance between excitation and inhibition, partly through the complex interplay between voltage-gated sodium and potassium ion channels. Because K+ channel blockade or gene deletion causes hyperexcitability, it is generally assumed that increases in K+ channel gene expression should reduce neuronal network excitability. We have tested this hypothesis by creating a transgenic mouse that expresses a Shaker-type K+ channel gene. Paradoxically, we find that addition of the extra K+ channel gene results in a hyperexcitable rather than a hypoexcitable phenotype. The presence of the transgene leads to a complex deregulation of endogenous Shaker genes in the adult central nervous system as well as an increase in network excitability that includes spontaneous cortical spike and wave discharges and a lower threshold for epileptiform bursting in isolated hippocampal slices. These data suggest that an increase in K+ channel gene dosage leads to dysregulation of normal K+ channel gene expression, and it may underlie a mechanism contributing to the pathogenesis of human aneuploidies such as Down syndrome.  (+info)

Intrapreoptic microinjection of GHRH or its antagonist alters sleep in rats. (5/10381)

Previous reports indicate that growth hormone-releasing hormone (GHRH) is involved in sleep regulation. The site of action mediating the nonrapid eye movement sleep (NREMS)-promoting effects of GHRH is not known, but it is independent from the pituitary. GHRH (0.001, 0. 01, and 0.1 nmol/kg) or a competitive antagonist of GHRH (0.003, 0.3, and 14 nmol/kg) was microinjected into the preoptic area, and the sleep-wake activity was recorded for 23 hr after injection in rats. GHRH elicited dose-dependent increases in the duration and in the intensity of NREMS compared with that in control records after intrapreoptic injection of physiological saline. The antagonist decreased the duration and intensity of NREMS and prolonged sleep latency. Consistent alterations in rapid eye movement sleep (REMS) and in brain temperature were not found. The GHRH antagonist also attenuated the enhancements in NREMS elicited by 3 hr of sleep deprivation. Histological verification of the injection sites showed that the majority of the effective injections were in the preoptic area and the diagonal band of Broca. The results indicate that the preoptic area mediates the sleep-promoting activity of GHRH.  (+info)

EEG surveillance as a means of extending operability in high risk carotid endarterectomy. (6/10381)

Some patients who have transient ischemic attacks are denied operation because severe occlusive lesions in other extra-cranial arteries may be inappropriately interpreted as constituting an unacceptable surgical risk, or because the lesion is so distal as to make its removal hazardous. Failure of endarterectomy is usually due to incomplete removal of the lesion or to thrombosis upon the frayed intima. Such lesions require excellent visualization and meticulous surgical technique -- not always possible with a shunt. Among 130 consecutive carotid endarterectomies performed under general anesthesia, EEG changes consistent with cerebral ischemia appeared in only nine (7%). These patients required a shunt. In 11 patients normal EEG tracings were obtained during endarterectomy despite contralateral carotid occlusion. None of these patients had a neurological deficit. Continuous EEG monitoring is a reliable method of detecting changes in cerebral perfusion, permits a more meticulous endarterectomy in high-lying lesions without a shunt, and extends operability in high risk patients. Angiographical findings may be an unreliable predictor concerning risk of endarterectomy.  (+info)

Intensive care management of stroke patients. (7/10381)

Two hundred eighty patients were admitted to an intensive care stroke unit over a one-year period. Subsequent investigation indicated that only 199 of these patients actually had cerebral ischemic or hemorrhagic lesions, 10 had other cerebrovascular lesions, and the remaining 71 patients had unrelated diseases, predominantly seizures. Detailed analysis of 103 stroke patients revealed an overall incidence of 59% hypertension, and 72% had hypertensive, ischemic or valvular heart disease. Fifty percent of the patients had various cardiac arrhythmias, some of which were responsible for the acute cerebrovascular lesion. Fourteen patients died during the acute phase, 11 from apparently irreversible cerebral selling, mainly due to cerebral hemorrhage. Secondary complications such as pneumonia, pulmonary embolism, pressure sores and urinary infection were almost nonexistent, but beneficial effects on the primary cerebral lesions were more difficult to demonstrate.  (+info)

Subcortical arteriosclerotic encephalopathy (Binswanger's disease). A vascular etiology of dementia. (8/10381)

A 51-yearold man with moderate intermittent hypertension had a rapidly progressive, profound dementia in the absence of significant localizing neurological signs. Postmortem examination disclosed the vascular alterations and diffuse white matter degeneration which characterize subcortical arteriosclerotic encephalopathy (SAE) or Binswanger's disease. The case underscores the need to consider vascular disease as an etiology of dementia -- even in the absence of focal neurological deficit.  (+info)

electroencephalographselectroencephalographs
Definition : Encephalographs designed for recording the variations of the electric potential caused by the electrical activity of the brain, usually detected on the scalp. These recorders consist of a main unit that includes memory (e.g., strip chart, flash card), signal processors, and a cable that is connected at the distal tip through a head box (amplifying unit) to a set of electrodes. The electrodes are typically placed on a cap or net fixed on the scalp in an array of standardized positions. Intracranial electrodes are used in very specific procedures. The electrodes and leads transmit the bioelectrical signals to a recorder which is capable of storing their characteristics for later display in an amplitude versus time graph (i.e., an electroencephalogram); some recorders can also provide a spectral analysis of the signals using a dedicated firmware. Electroencephalographs (EEGs) are used to help in the diagnosis of neurological diseases (e.g., epilepsy), to assist in localizing tumors and ...
Diagnostic usefulness of linear and nonlinear quantitative EEG analysis in Alzheimers disease<...Diagnostic usefulness of linear and nonlinear quantitative EEG analysis in Alzheimer's disease<...
TY - JOUR. T1 - Diagnostic usefulness of linear and nonlinear quantitative EEG analysis in Alzheimers disease. AU - Stam, C J. AU - Jelles, B. AU - Achtereekte, H A. AU - van Birgelen, J H. AU - Slaets, J P. PY - 1996/4. Y1 - 1996/4. N2 - The sensitivity of the EEG in early AD is somewhat limited. In this respect spectral analysis is little better than visual assessment. In this study we address the question whether a new type of EEG analysis derived from chaos theory can improve the sensitivity of the EEG. EEGs were recorded in 15 control subjects and 15 patients with mild AD. The EEG recorded at 02 and 01 during eyes closed and eyes open conditions was subjected to spectral analysis (relative power) and nonlinear analysis (calculation of the correlation dimension D2). AD patients had more relative theta power and impaired reactivity in alpha, delta and theta bands. Also, reactivity of the D2 was impaired in AD subjects. For a specificity of 100%, relative theta power had the highest ...
Resting frontal EEG asymmetry in children: Meta-analyses of the effects of psychosocial risk factors and associations with...Resting frontal EEG asymmetry in children: Meta-analyses of the effects of psychosocial risk factors and associations with...
TY - JOUR. T1 - Resting frontal EEG asymmetry in children. T2 - Meta-analyses of the effects of psychosocial risk factors and associations with internalizing and externalizing behavior. AU - Peltola, Mikko J.. AU - Bakermans-Kranenburg, Marian J.. AU - Alink, Lenneke R.A.. AU - Huffmeijer, Renske. AU - Biro, Szilvia. AU - van Ijzendoorn, Marinus H.. PY - 2014/1/1. Y1 - 2014/1/1. N2 - Asymmetry of frontal cortical electroencephalogram (EEG) activity in children is influenced by the social environment and considered a marker of vulnerability to emotional and behavioral problems. To determine the reliability of these associations, we used meta-analysis to test whether variation in resting frontal EEG asymmetry is consistently associated with (a) having experienced psychosocial risk (e.g., parental depression or maltreatment) and (b) internalizing and externalizing behavior outcomes in children ranging from newborns to adolescents. Three meta-analyses including 38 studies (N=2,523) and 50 pertinent ...
The Impact of Amplitude-Integrated Electroencephalography on NICU Practice.The Impact of Amplitude-Integrated Electroencephalography on NICU Practice.
Objective: To examine how the introduction of amplitude-integrated electroencephalography (aEEG) to our neonatal intensive care unit (NICU) influenced clinical practice. Methods: This was a retrospective study examining clinical practice three years
Modeling of intracerebral interictal epileptic discharges: Evidence for network interactions<...Modeling of intracerebral interictal epileptic discharges: Evidence for network interactions<...
TY - JOUR. T1 - Modeling of intracerebral interictal epileptic discharges. T2 - Evidence for network interactions. AU - Meesters, Stephan. AU - Ossenblok, Pauly. AU - Colon, Albert. AU - Wagner, Louis. AU - Schijns, Olaf. AU - Boon, Paul. AU - Florack, Luc. AU - Fuster, Andrea. PY - 2018/6/1. Y1 - 2018/6/1. KW - Stereo-electroencephalography. KW - Analysis framework. KW - Interictal epileptic discharges. KW - Spatiotemporal network interaction. KW - Epilepsy surgery. KW - TEMPORAL-LOBE EPILEPSY. KW - INDEPENDENT COMPONENT ANALYSIS. KW - EPILEPTOGENIC NETWORKS. KW - SOURCE LOCALIZATION. KW - BLIND SEPARATION. KW - CLUSTER-ANALYSIS. KW - BRAIN NETWORKS. KW - EEG. KW - SIGNALS. KW - SEEG. U2 - 10.1016/j.clinph.2018.03.021. DO - 10.1016/j.clinph.2018.03.021. M3 - Article. VL - 129. SP - 1276. EP - 1290. JO - Clinical Neurophysiology. JF - Clinical Neurophysiology. SN - 1388-2457. IS - 6. ER - ...
Quantitative EEG as a biomarker in mild cognitive impairment with Lewy bodies | Alzheimers Research & Therapy | Full TextQuantitative EEG as a biomarker in mild cognitive impairment with Lewy bodies | Alzheimer's Research & Therapy | Full Text
To investigate using quantitative EEG the (1) differences between patients with mild cognitive impairment with Lewy bodies (MCI-LB) and MCI with Alzheimers disease (MCI-AD) and (2) its utility as a potential biomarker for early differential diagnosis. We analyzed eyes-closed, resting-state, high-density EEG data from highly phenotyped participants (39 MCI-LB, 36 MCI-AD, and 31 healthy controls). EEG measures included spectral power in different frequency bands (delta, theta, pre-alpha, alpha, and beta), theta/alpha ratio, dominant frequency, and dominant frequency variability. Receiver operating characteristic (ROC) analyses were performed to assess diagnostic accuracy. There was a shift in power from beta and alpha frequency bands towards slower frequencies in the pre-alpha and theta range in MCI-LB compared to healthy controls. Additionally, the dominant frequency was slower in MCI-LB compared to controls. We found significantly increased pre-alpha power, decreased beta power, and slower dominant
QEEG (Quantitative Electroencephalography) - Christopher Fisher, PhDQEEG (Quantitative Electroencephalography) - Christopher Fisher, PhD
Learn more about quantitative electroencephalography (QEEG), also known as brainmapping and neuroimaging provided by Dr. Christopher Fisher.
Does muscle tension reflect arousal? Relationship between electromyographic and electroencephalographic recordings<...Does muscle tension reflect arousal? Relationship between electromyographic and electroencephalographic recordings<...
TY - JOUR. T1 - Does muscle tension reflect arousal? Relationship between electromyographic and electroencephalographic recordings. AU - Hoehn-Saric, Rudolf. AU - Hazlett, Richard L.. AU - Pourmotabbed, Tahere. AU - McLeod, Daniel R.. PY - 1997/5/16. Y1 - 1997/5/16. N2 - Increased muscle tension and heightened arousal are the most consistent finding in patients with anxiety disorders. This study examined the relationship between frontalis and gastrocnemius electromyographic (EMG) and electroencephalographic activity on 14 female generalized anxiety disorder patients and 14 female control subjects. In GAD patients, gastrocnemius but not frontalis EMG was correlated with right but not left hemisphere activity. For the non-anxious subjects, there was a pattern for both β1 and β2 waves to be positively associated with both frontalis and gastrocnemius muscle tension levels. The results, while preliminary, suggest that EMG activity may reflect central nervous system arousal.. AB - Increased muscle ...
Intrinsic Connectivity Networks, Alpha Oscillations, and Tonic Alertness: A Simultaneous Electroencephalography/Functional...Intrinsic Connectivity Networks, Alpha Oscillations, and Tonic Alertness: A Simultaneous Electroencephalography/Functional...
Spontaneous fluctuations of ongoing brain activity can be observed across a wide range of states, from sleep and even sedation, anesthesia, and coma over resting wakefulness all the way to effortful mental activity (Fox and Raichle, 2007). The fluctuations are spatially organized into ICNs. Their spatial patterns remain qualitatively robust across the different states but show fine-grained quantitative changes of connectivity (Horovitz et al., 2009; Vanhaudenhuyse et al., 2010). EEG has a longstanding tradition in monitoring and actually defining different brain states but it has also recently been shown to reflect activity fluctuations occurring within a given state as resting wakefulness. Activity in different ICNs, as recorded for instance in resting state fMRI studies, has been tied to power in different EEG frequency bands or even patterns of power across the EEG spectrum (Mantini et al., 2007). Here, we have pursued a hypothesis derived from previous work and focused on slow activity ...
Accurate epileptogenic focus localization through time-variant functional connectivity analysis of intracranial...Accurate epileptogenic focus localization through time-variant functional connectivity analysis of intracranial...
article{1266159, author = {van Mierlo, Pieter and Carrette, Evelien and Hallez, Hans and Vonck, Kristl and Van Roost, Dirk and Boon, Paul and Staelens, Steven}, issn = {1053-8119}, journal = {NEUROIMAGE}, keyword = {DEEP BRAIN-STIMULATION,DIRECTED TRANSFER-FUNCTION,VAGUS NERVE-STIMULATION,TEMPORAL-LOBE EPILEPSY,INFORMATION-FLOW,REFRACTORY EPILEPSY,GRANGER CAUSALITY,FMRI DATA,SPECTRAL-ANALYSIS,EEG ACTIVITY,Functional connectivity pattern,Intracranial electroencephalography,Epilepsy,Time-variant multivariate autoregressive modeling,Adaptive directed transfer function}, language = {eng}, number = {3}, pages = {1122--1133}, title = {Accurate epileptogenic focus localization through time-variant functional connectivity analysis of intracranial electroencephalographic signals}, url = {http://dx.doi.org/10.1016/j.neuroimage.2011.02.009}, volume = {56}, year = {2011 ...
Efficacy of valproate on electroencephalography and obesity in children with epilepsy | AbstractEfficacy of valproate on electroencephalography and obesity in children with epilepsy | Abstract
Objective: To observe and evaluate the efficacy of valproate on electroencephalography and obesity in children with epilepsy. Methods: 109 children w..
Health Information | Almondsbury Surgery | Electroencephalograph (EEG)Health Information | Almondsbury Surgery | Electroencephalograph (EEG)
Where there is doubt about a diagnosis of epilepsy, or where the type of seizures someone experiences is unclear, video-telemetry can be helpful. This is a test that uses a video camera linked to an EEG machine. The camera will visually record your movements and, at the same time, the EEG machine will record your brainwave pattern. Both the video and EEG are stored on to a computer so that they can be reviewed once the test is finished. The doctor will be able to see any seizures that you may have had, as well as any changes in your EEG at that time. The test is often carried out over a number of days in order to increase the chances of recording one of your seizures.. ...
Neural correlates of age-related visual search decline: A combined ERP and sLORETA study - Semantic ScholarNeural correlates of age-related visual search decline: A combined ERP and sLORETA study - Semantic Scholar
Differences in the neural systems underlying visual search processes for young (n=17, mean age 19.6+/-1.9) and older (n=22, mean age 68.5+/-6) subjects were investigated combining the Event-Related Potential (ERP) technique with standardized Low-Resolution brain Electromagnetic Tomography (sLORETA) analyses. Behavioral results showed an increase in mean reaction times (RTs) and a reduction in hit rates with age. The ERPs were significantly different between young and older subjects at the P3 component, showing longer latencies and lower amplitudes in older subjects. These ERP results suggest an age-related decline in the intensity and speed of visual processing during visual search that imply a reduction in attentional resources with normal aging. The sLORETA data revealed a significantly reduced neural differentiation in older subjects, who recruited bilateral prefrontal regions in a nonselective manner for the different search arrays. Finally, sLORETA between-group comparisons revealed that relative
Processed Electroencephalographic Changes Associated with Hypoglycemia during the Resection of an Insulinoma | Anesthesiology |...Processed Electroencephalographic Changes Associated with Hypoglycemia during the Resection of an Insulinoma | Anesthesiology |...
Over the next 15 min, during preparation and draping of the patient, the PSA value gradually decreased to 17, and the isoflurane was discontinued. Despite this adjustment, his electroencephalography value remained essentially unchanged. During this time, there were no significant changes in heart rate or blood pressure, and the patient remained normothermic. An arterial blood sample was drawn, the analysis of which revealed a blood glucose concentration of 40 mg/dl, an arterial oxygen tension of 171 mmHg, and an arterial carbon dioxide tension of 32 mmHg. Intravenous dextrose, 12.5 g, was given rapidly. Approximately 2 to 3 min later, his PSA value increased to 48, and his blood glucose concentration was 235 mg/dl. The isoflurane was restarted at 0.2%, while the surgeons continued to prepare and drape the patient. Several minutes prior to incision, the isoflurane was titrated up to 1.9%. The patient tolerated the incision, and the isoflurane was gradually decreased. The patient remained stable ...
archive-nl.com: epilepsievereniging.nl - Neuroimaging and electroencephalographic changes after VNS - Epilepsie Vereniging...archive-nl.com: epilepsievereniging.nl - Neuroimaging and electroencephalographic changes after VNS - Epilepsie Vereniging...
a 5 year period Patients with complete 6 and 12 month follow up data were included Analysis was also done across various subgroups including gender age at implantation seizure type abnormal MRI findings pre implantation number of medications at baseline history of SE and duration of epilepsy Results complete follow up data were available for 69 patients Median seizure reduction for these patients was 50 Q1 0 Q3 73 at 6 months and 40 Q1 25 Q3 75 at 12 months When stratified by baseline seizure frequency there was a significant reduction from baseline of 61 at 6 months and 69 at 12 months for patients in the high baseline frequency group There were no significant reductions at month 6 or 12 months for the lower baseline frequency group Adverse events were reported in 40 6 28 out of 69 patients Six patients had the VNS removed for reasons including lack of efficacy and side effects and were excluded from the study group http www ncbi nlm nih gov pubmed 24438620 Comments of reviewer Prof Van ...
US4417590A - Electroencephalograph - Google PatentsUS4417590A - Electroencephalograph - Google Patents
A multi-channel instrumentation system is provided wherein signals from selected electrode pairs are sequentially connected to the isolated input of a common signal amplifying path. The electrode pair selecting means is included in a portable head box which may be placed adjacent to the patient to be tested. Included in the head box are facilities for testing the impedance of any selected one of the patient electrodes and providing a visual indication of the magnitude of such impedance. The head box also includes facilities for selecting a group of patient electrodes which are connected together and used as an average or reference potential for one input of the common signal path. Facilities are also provided for calibrating the common signal path by applying a d.c. calibration signal to the input thereof by means isolated from system ground. An improved circuit arrangement is provided for limiting the current which can be drawn from the patient ground electrode to a small value to provide for the
Frontiers | Long-Range Temporal Correlations in Resting State Beta Oscillations are Reduced in Schizophrenia | PsychiatryFrontiers | Long-Range Temporal Correlations in Resting State Beta Oscillations are Reduced in Schizophrenia | Psychiatry
Symptoms of schizophrenia (SCZ) are likely to be generated by genetically mediated synaptic dysfunction, which contribute to large-scale functional neural dysconnectivity. Recent electrophysiological studies suggest that this dysconnectivity is present not only at a spatial level but also at a temporal level, operationalized as long-range temporal correlations (LRTCs). Previous research suggests that alpha and beta frequency bands have weaker temporal stability in people with SCZ. This study sought to replicate these findings with high-density electroencephalography (EEG), enabling a spatially more accurate analysis of LRTC differences, and to test associations with characteristic SCZ symptoms and cognitive deficits. A 128-channel EEG was used to record eyes-open resting state brain activity of 23 people with SCZ and 24 matched healthy controls (HCs). LRTCs were derived for alpha (8-12 Hz) and beta (13-25 Hz) frequency bands. As an exploratory analysis, LRTC was source projected using sLoreta. People
CN102821681B - Brain wave measuring device and electric noise estimation method - Google PatentsCN102821681B - Brain wave measuring device and electric noise estimation method - Google Patents
By taking such measures that in the brain wave measurement by a wearable device capable of an acoustic output and in a brain wave interface or in a brain wave monitor, noise derived from an output acoustic signal is estimated and removed from the voltage level obtained at an electrode, brain waves can be used without being affected by the noise. A brain wave measuring device comprises: a brain wave measuring unit for measuring the brain waves of the user by using a plurality of electrodes; an electroacoustic converter disposed in the vicinity of at least one electrode among the plurality of electrodes when the user wears the brain wave measuring unit and presenting an acoustic signal to the user; an amplitude envelope extraction unit for extracting the amplitude envelope of the acoustic signal presented from the electroacoustic converter; a frequency analysis unit for analyzing the frequency of the amplitude envelope extracted by the amplitude envelope extraction unit; and a noise estimation unit
Interictal abnormalities of gamma band activity in visual evoked responses in migraine: an indication of thalamocortical...Interictal abnormalities of gamma band activity in visual evoked responses in migraine: an indication of thalamocortical...
Coppola G, Ambrosini A, Di Clemente L, Magis D, Fumal A, Gérard P, Pierelli F & Schoenen J. Interictal abnormalities of gamma band activity in visual evoked responses in migraine: an indication of thalamocortical dysrhythmia? Cephalalgia 2007; 27:1360-1367. London. ISSN 0333-1024. Between attacks, migraineurs lack habituation in standard visual evoked potentials (VEPs). Visual stimuli also evoke high-frequency oscillations in the gamma band range (GBOs, 20-35 Hz) assumed to be generated both at subcortical (early GBOs) and cortical levels (late GBOs). The consecutive peaks of GBOs were analysed regarding amplitude and habituation in six successive blocks of 100 averaged pattern reversal (PR)-VEPs in healthy volunteers and interictally in migraine with (MA) or without aura patients. Amplitude of the two early GBO components in the first PR-VEP block was significantly increased in MA patients. There was a significant habituation deficit of the late GBO peaks in migraineurs. The increased ...
Granger Causality Analysis of Steady-State Electroencephalographic Signals during Propofol-Induced AnaesthesiaGranger Causality Analysis of Steady-State Electroencephalographic Signals during Propofol-Induced Anaesthesia
Changes in conscious level have been associated with changes in dynamical integration and segregation among distributed brain regions. Recent theoretical developments emphasize changes in directed functional (i.e., causal) connectivity as reflected in quantities such as integrated information and causal density. Here we develop and illustrate a rigorous methodology for assessing causal connectivity from electroencephalographic (EEG) signals using Granger causality (GC). Our method addresses the challenges of non-stationarity and bias by dividing data into short segments and applying permutation analysis. We apply the method to EEG data obtained from subjects undergoing propofol-induced anaesthesia, with signals source-localized to the anterior and posterior cingulate cortices. We found significant increases in bidirectional GC in most subjects during loss-of-consciousness, especially in the beta and gamma frequency ranges. Corroborating a previous analysis we also found increases in synchrony in
Read Download Brain Wave Vibration (Second Edition): Getting Back into the Rhythm of a Happy, Healthy Life Ebook Full ~...Read Download Brain Wave Vibration (Second Edition): Getting Back into the Rhythm of a Happy, Healthy Life Ebook Full ~...
Gratuit Science of brain wave technology for intellectual ... Neurofeedback is a form of training that monitors your brain waves and trains you to control them. Providers claim it makes you smarter and more creative. Brain Wave 32 Advanced Binaural Brainwave Entrainment ... Read reviews, compare customer ratings, see screenshots, and learn more about Brain Wave 32 Advanced Binaural Brainwave Entrainment Programs with ... Electroencephalography Wikipedia Electroencephalography (EEG) is an electrophysiological monitoring method to record electrical activity of the brain. It is typically noninvasive, with the electrodes ... Brain Waves Binaural Beats Android Apps on Google Play With this app you can easily generate pure waves that will stimulate your concentration, meditation or relaxation. Very Important Use headphones for a ... Alpha Brain Waves Boost Creativity and Reduce Depression ... Neuroscientists recently made a correlation between an increase of alpha brain waveseither through electrical ...
EnkephaloVision: Anatomical Functionality Indicated by Ultrashort Transient Regional EEG Spectral Power Changes during...EnkephaloVision: Anatomical Functionality Indicated by Ultrashort Transient Regional EEG Spectral Power Changes during...
Anatomical functionality is a major topic in brain research. Numerous investigations have shown task dependent activation of focal brain areas, with most information based on time-averaged data due to methodological limitations. Ultra-fast quantitative EEG, especially in the newly developed combination with eye tracking (EnkephaloVision), is very suitable to follow activities of local electric circuits. This investigation in 57 subjects revealed transient focal frequency changes reaching up to more than 6000% of global median spectra power during cognitive and emotional challenges at frontal electrode positions. Recording epochs of 364 ms uncovered coherences with respect to focal brain areas and single frequencies, which are typically lost during averaged calculations. When averaging data over a whole scene, a least demanding challenge like viewing a boring animal video only activated the lateral frontal lobe, whereas solving brain-teasers and performance of mathematical calculations led to delta
Evaluation of a Handheld Event Related Potential (ERP)/Quantitative Electroencephalography (qEEG) System (COGNISION™) as a...Evaluation of a Handheld Event Related Potential (ERP)/Quantitative Electroencephalography (qEEG) System (COGNISION™) as a...
Inclusion Criteria:. AD Cohort:. Subjects between 60 and 90 years old meeting NINCDS-ADRDA criteria for probable AD2 and DSM-IV criteria for dementia of the Alzheimers type3 will be recruited in the AD cohort (MMSE ≥21, ≤26).. Memory complaint by subject and/or study partner SRP-1418 N Page: 8 of 26. Abnormal memory function score on Logical Memory II subscale (Delayed Paragraph Recall) from the Wechsler Memory Scale - Revised (adjusted for education. Maximum score is 25):. i. , 10 for 16 or more years of education ii. , 6 for 8-15 years of education iii. , 4 for 0-7 years of education Clinical Dementia Rating (CDR) = 0.5, 1.0 or 2.0 Modified Hachinski Ischemic Scale (HIS) ≤ 4 Geriatric Depression Scale (GDS) , 6 For subjects that decide to provide a CSF sample: Platelet count ≥ 100,000/μL, Prothrombin Time (PT) = 11 to 16 seconds, International Normalized Ratio = 0.8 to 1.2 Study partner or caregiver to accompany subject to all scheduled visits Fluent in English Adequate visual acuity ...
Evaluation of a Handheld Event Related Potential (ERP)/Quantitative Electroencephalography (qEEG) System (COGNISION™) as a...Evaluation of a Handheld Event Related Potential (ERP)/Quantitative Electroencephalography (qEEG) System (COGNISION™) as a...
Inclusion Criteria:. AD Cohort:. Subjects between 60 and 90 years old meeting NINCDS-ADRDA criteria for probable AD2 and DSM-IV criteria for dementia of the Alzheimers type3 will be recruited in the AD cohort (MMSE ≥21, ≤26).. Memory complaint by subject and/or study partner SRP-1418 N Page: 8 of 26. Abnormal memory function score on Logical Memory II subscale (Delayed Paragraph Recall) from the Wechsler Memory Scale - Revised (adjusted for education. Maximum score is 25):. i. , 10 for 16 or more years of education ii. , 6 for 8-15 years of education iii. , 4 for 0-7 years of education Clinical Dementia Rating (CDR) = 0.5, 1.0 or 2.0 Modified Hachinski Ischemic Scale (HIS) ≤ 4 Geriatric Depression Scale (GDS) , 6 For subjects that decide to provide a CSF sample: Platelet count ≥ 100,000/μL, Prothrombin Time (PT) = 11 to 16 seconds, International Normalized Ratio = 0.8 to 1.2 Study partner or caregiver to accompany subject to all scheduled visits Fluent in English Adequate visual acuity ...
Quantitative EEG in ischemic stroke : correlation with infarct volume and functional status in posterior circulation and...Quantitative EEG in ischemic stroke : correlation with infarct volume and functional status in posterior circulation and...
Objective The significant impact of stroke on health care results in an unmet need for efficient stroke care in resources limited environments. Practical, inexpensive and easy to obtain predictive EEG parameters have been suggested in anterior circulation syndromes. We investigated whether EEG parameters are of additional predictive value with regard to lesion volume and short-term functional outcome in lacunar (LACS) and posterior circulation (POCS) syndromes of presumed ischemic origin. Methods Sixty (60) patients presenting with LACS or POCS were incrementally included. EEG parameters were correlated with volume of ischemia and functional status. Predictive values for definite stroke and unfavourable outcome were calculated using receiver operating characteristic (ROC) curves and logistic regression modelling. Results The pairwise derived brain symmetry index (pdBSI) emerged as independent predictor for definite stroke in patients presenting with LACS and POCS (odds ratio (OR) 2.69, 95% ...
Your Brain Waves May Show Whether Youre Paying Attention in ClassYour Brain Waves May Show Whether You're Paying Attention in Class
You really can get on the same wavelength as someone else: In a new study, the brain waves of high school students synced up when they were highly engaged during a biology class.. On 11 days over the course of one semester, researchers hooked up all 12 of the students in a biology class to portable devices called electroencephalograms (EEGs) that measured their brain waves. The more synced up a students brain waves were with the brain waves of the rest of the students in the class, the more likely that person was to say that he or she enjoyed the class that day, according to the study, published today (April 27) in the journal Current Biology. For example, when the researchers analyzed brain waves called alpha waves, they found that students waves were more likely to rise and fall at the same time as other students waves when they were highly engaged in the class.. Likewise, when a students brain waves were less synced with those of the rest of the class, the student was less likely to say ...
Neurophysiological Mechanisms - Oxford ScholarshipNeurophysiological Mechanisms - Oxford Scholarship
The seventh part of this book deals with possible neurophysiological mechanisms involved in motor synergies. It starts with a discussion of the structure-function controversy in neurophysiology. Then, it presents reviews of the literature on the role in synergy formation of different structures within the central nervous system such as the spinal cord, the cerebellum, the basal ganglia, and the cortex of the large hemispheres. The review covers animal studies, studies of patients with different neurological disorders, and studies of healthy persons. Studies using transcranial magnetic stimulation are reviewed with respect to the equilibrium-point hypothesis of movement control. Relations between neuronal population vectors and performance variables are discussed. There is one more Digression in this part addressing the issue of localization of functions within brain structures.
Neurophysiological Mechanisms and Consciousness - Ciba Foundation Symposium 69 - Brain and Mind - Creutzfeldt - Wiley Online...Neurophysiological Mechanisms and Consciousness - Ciba Foundation Symposium 69 - Brain and Mind - Creutzfeldt - Wiley Online...
Creutzfeldt, O. D. (1979) Neurophysiological Mechanisms and Consciousness, in Ciba Foundation Symposium 69 - Brain and Mind (eds G. E. W. Wolstenholme and M. OConnor), John Wiley & Sons, Ltd., Chichester, UK. doi: 10.1002/9780470720523.ch12 ...
QEEG (Quantitative Electroencephalography) - Listen And Learn CentreQEEG (Quantitative Electroencephalography) - Listen And Learn Centre
QEEG is a comprehensive diagnostic tool to measure brain activity for ADHD and a range of treatment areas, available in Melbourne.
Best Electroencephalography Eeg Doctor in Gurgaon, Electroencephalography Eeg Doctors | CredihealthBest Electroencephalography Eeg Doctor in Gurgaon, Electroencephalography Eeg Doctors | Credihealth
Find the best electroencephalography eeg doctors in Gurgaon. Get guidance from medical experts to select electroencephalography eeg specialist in Gurgaon from trusted hospitals - credihealth.com
Computer analysis of epileptiform EEG abnormalities | Cleveland Clinic Journal of MedicineComputer analysis of epileptiform EEG abnormalities | Cleveland Clinic Journal of Medicine
AbstractPROLONGED multichannel electroencephalographic (EEG) recordings are required for the evaluation of an epilepsy surgery candidate in order to define precisely the epileptogenic areas, the patients suitability for surgical treatment, and the extent of a proposed resection. An adequate sample of ictal and interictal EEG abnormalities must be obtained to make these important clinical decisions. The minimal monitoring period required to obtain the sample varies from patient to patient, but should be as short as possible.Minimizing the time away from home is especially important when recording from pediatric patients. Children do not understand the importance of the diagnostic test, may be less patient in a restricted and boring setting, and are more likely to interfere with the apparatus. Nevertheless, a positive diagnosis and definite classification are more important at this stage of life than at any other. In patients of any age requiring intensive inpatient EEG monitoring, a computer system can
Niedermeyers Electroencephalography: Basic Principles, Clinical Applications, and Related FieldsNiedermeyer's Electroencephalography: Basic Principles, Clinical Applications, and Related Fields
The leading reference on electroencephalography since 1982, Niedermeyers Electroencephalography is now in its thoroughly updated sixth edition.
Category: Brain Mapping/QEEG - BELLABEECategory: Brain Mapping/QEEG - BELLABEE
Normal frequencies of the human brain associated states are shown below. These frequencies can be picked up by an EEG (Electroencephalogram) from the surface of the brain, after their amplification, as they are in the range of micro-volts. A mixture of these frequencies is present at any given time. Quantitative Electroencephalography (QEEG) is an extension of the analysis of the visual EEG interpretation which may assist and even augment our understanding of the EEG and brain function. QEEG is a procedure that processes the recorded EEG activity from a multi-electrode recording using a computer and converts it into a brain map showing different brain waves ...
UBIRA ETheses - Neurophysiological correlates of preparation for action measured by electroencephalographyUBIRA ETheses - Neurophysiological correlates of preparation for action measured by electroencephalography
The optimal performance of an action depends to a great extend on the ability of a person to prepare in advance the appropriate kinetic and kinematic parameters at a specific point in time in order to meet the demands of a given situation and to foresee its consequences to the surrounding environment. In the research presented in this thesis, I employed high-density electroencephalography in order to study the neural processes underlying preparation for action. A typical way for studying preparation for action in neuroscience is to divide it in temporal preparation (when to respond) and event preparation (what response to make). In Chapter 2, we identified electrophysiological signs of implicit temporal preparation in a task where such preparation was not essential for the performance of the task. Electrophysiological traces of implicit timing were found in lateral premotor, parietal as well as occipital cortices. In Chapter 3, explicit temporal preparation was assessed by comparing anticipatory ...
IJERPH | Free Full-Text | Binge Drinking Effects on EEG in Young Adult Humans | NotesIJERPH | Free Full-Text | Binge Drinking Effects on EEG in Young Adult Humans | Notes
Young adult (N = 96) university students who varied in their binge drinking history were assessed by electroencephalography (EEG) recording during passive viewing. Groups consisted of male and female non-binge drinkers (|1 to 5/4 drinks/ounces in under two hours), low-binge drinkers (5/4-7/6 drinks/ounces in under two hours), and high-binge drinkers (≥ 10 drinks/ounces in under two hours), who had been drinking alcohol at their respective levels for an average of 3 years. The non- and low-binge drinkers exhibited less spectral power than the high-binge drinkers in the delta (0-4 Hz) and fast-beta (20-35 Hz) bands. Binge drinking appears to be associated with a specific pattern of brain electrical activity in young adults that may reflect the future development of alcoholism.
Detection of synchronized oscillations in the electroencephalogram: an evaluation of methods. - Nuffield Department of Clinical...Detection of synchronized oscillations in the electroencephalogram: an evaluation of methods. - Nuffield Department of Clinical...
The signal averaging approach typically used in ERP research assumes that peaks in ERP waveforms reflect neural activity that is uncorrelated with activity in the ongoing EEG. However, this assumption has been challenged by research suggesting that ERP peaks reflect event-related synchronization of ongoing EEG oscillations. In this study, we investigated the validity of a set of methods that have been used to demonstrate that particular ERP peaks result from synchronized EEG oscillations. We simulated epochs of EEG data by superimposing phasic peaks on noise characterized by the power spectrum of the EEG. When applied to the simulated data, the methods in question produced results that have previously been interpreted as evidence of synchronized oscillations, even though no such synchrony was present. These findings suggest that proposed analysis methods may not effectively disambiguate competing views of ERP generation.
MRI with and without a high-density EEG cap--what makes the difference? - Zurich Open Repository and ArchiveMRI with and without a high-density EEG cap--what makes the difference? - Zurich Open Repository and Archive
Besides the benefit of combining electroencephalography (EEG) and magnetic resonance imaging (MRI), much effort has been spent to develop algorithms aimed at successfully cleaning the EEG data from MRI-related gradient and ballistocardiological artifacts. However, there are also studies showing a negative influence of the EEG on MRI data quality. Therefore, in the present study, we focused for the first time on the influence of the EEG on morphometric measurements of T1-weighted MRI data (voxel- and surfaced-based morphometry). Here, we demonstrate a strong influence of the EEG on cortical thickness, surface area, and volume as well as subcortical volumes due to local EEG-related inhomogeneities of the static magnetic (B0) and the gradient field (B1). In a second step, we analyzed the signal-to-noise ratios for both the anatomical and the functional data when recorded simultaneously with EEG and MRI and compared them to the ratios of the MRI data without simultaneous EEG measurements. These ...
A decision support framework for the discrimination of children with controlled epilepsy based on EEG analysis | Journal of...A decision support framework for the discrimination of children with controlled epilepsy based on EEG analysis | Journal of...
In this work we consider hidden signs (biomarkers) in ongoing EEG activity expressing epileptic tendency, for otherwise normal brain operation. More specifically, this study considers children with controlled epilepsy where only a few seizures without complications were noted before starting medication and who showed no clinical or electrophysiological signs of brain dysfunction. We compare EEG recordings from controlled epileptic children with age-matched control children under two different operations, an eyes closed rest condition and a mathematical task. The aim of this study is to develop reliable techniques for the extraction of biomarkers from EEG that indicate the presence of minor neurophysiological signs in cases where no clinical or significant EEG abnormalities are observed. We compare two different approaches for localizing activity differences and retrieving relevant information for classifying the two groups. The first approach focuses on power spectrum analysis whereas the second
Brain waves, or the EEG are electrical signals that can be recorded from the brain, either directly or through the scalp. The...Brain waves, or the EEG are electrical signals that can be recorded from the brain, either directly or through the scalp. The...
Brain waves, or the EEG, are electrical signals that can be recorded from the brain, either directly or through the scalp. The kind of brain wave recorded depends on the behavior of the animal, and is the visible evidence of the kind of neuronal (brain cell) processing necessary for that behavior.. We are working on fast brain waves, at about 40 cycles per second (Hz), which are known as gamma band. Gamma rhythms appear to be involved in higher mental activity, including perception and consciousness. It seems to be associated with consciousness, eg it disappears with general anesthesia.. Synchronous activity at about 40Hz appears to be involved in binding sensory inputs into the single, unitary object we perceive. This process is so efficient, we are hardly aware that it goes on at all. Recordings of neurons in visual cortex show that synchronization at about 40 Hz links parts of the cortex excited by the same object, and not those excited by different objects, implicating in gamma rhythms in ...
Employing neuronal networks to investigate the pathophysiological basis of abnormal cortical oscillations in Alzheimers...Employing neuronal networks to investigate the pathophysiological basis of abnormal cortical oscillations in Alzheimer's...
TY - JOUR. T1 - Employing neuronal networks to investigate the pathophysiological basis of abnormal cortical oscillations in Alzheimers disease.. AU - Abuhassan, Kamal. AU - Coyle, DH. AU - Maguire, LP. PY - 2011. Y1 - 2011. N2 - This paper describes an investigation into the pathophysiological causes of abnormal cortical oscillations in Alzheimers disease (AD) using two heterogeneous neuronal network models. The effect of excitatory circuit disruption on the beta band power (13-30 Hz) using a conductance-based network model of 200 neurons is assessed. Then, the neural correlates of abnormal cortical oscillations in different frequency bands based on a larger network model of 1000 neurons consisting of different types of cortical neurons is also analyzed. The results show that, despite the heterogeneity of the network models, the beta band power is significantly affected by excitatory neural and synaptic loss. Secondly, the results of modeling a functional impairment in the excitatory circuit ...
Publications | Max Planck InstitutePublications | Max Planck Institute
A number of recent studies have hypothesized that monitoring in speech production may occur via domain-general mechanisms responsible for the detection of response conflict. Outside of language, two ERP components have consistently been elicited in conflict-inducing tasks (e.g., the flanker task): the stimulus-locked N2 on correct trials, and the response-locked error-related negativity (ERN). The present investigation used these electrophysiological markers to test whether a common response conflict monitor is responsible for monitoring in speech and non-speech tasks. Electroencephalography (EEG) was recorded while participants performed a tongue twister (TT) task and a manual version of the flanker task. In the TT task, people rapidly read sequences of four nonwords arranged in TT and non-TT patterns three times. In the flanker task, people responded with a left/right button press to a center-facing arrow, and conflict was manipulated by the congruency of the flanking arrows. Behavioral ...
Frontiers | Ongoing EEG Phase as a Trial-by-Trial Predictor of Perceptual and Attentional Variability | PsychologyFrontiers | Ongoing EEG Phase as a Trial-by-Trial Predictor of Perceptual and Attentional Variability | Psychology
Even in well-controlled laboratory environments, apparently identical repetitions of an experimental trial can give rise to highly variable perceptual outcomes and behavioral responses. This variability is generally discarded as a reflection of intrinsic noise in neuronal systems. However, part of this variability may be accounted for by trial-by-trial fluctuations of the phase of ongoing oscillations at the moment of stimulus presentation. For example, the phase of an EEG oscillation reflecting the rapid waxing and waning of sustained attention can predict the perception of a subsequent visual stimulus at threshold. Similar ongoing periodicities account for a portion of the trial-by-trial variability of visual reaction times. We review the available experimental evidence linking ongoing EEG phase to perceptual and attentional variability, and the corresponding methodology. We propose future tests of this relation, and discuss the theoretical implications for understanding the neuronal dynamics of
ELECTROENCEPHALOGRAPHY (EEG)ELECTROENCEPHALOGRAPHY (EEG)
What is the purpose of the test?. An electroencephalogram (EEG) is a test used to find problems related to electrical activity of the brain. An EEG tracks and records brain wave patterns. Small metal discs with thin wires (electrodes) are placed on the scalp, and then send signals to a computer to record the results.. What is the test about?. Electroencephalography (EEG) is a neurophysiology test which analyses the electrical activity generated by the brain. Special sensors (metal disc electrodes) are attached onto the head and hooked by wires to a computer. Common reasons for referral include:. Seizures. Encephalopathies (disease of the brain). EEG can also be performed as part of the investigations of some patients with syncope. Syncope, also known as fainting in medical terms, is defined as a transient loss of consciousness and postural tone, characterised by rapid onset, short duration and spontaneous recovery due to low blood flow to the brain usually because of low blood pressure. ...
Monitoring - Continuous EEGMonitoring - Continuous EEG
This course provides an overview for the indications and methodology of cEEG (Continuous Electroencephalography) monitoring in the ICU, and discusses the role of some quantitative EEG (Electroencephalography) analysis techniques. Clinical examples of cEEG use, including monitoring of status epileptics, assessment of ongoing therapy for treatment of seizures in critically ill patients, and monitoring for cerebral ischemia, are presented and discussed.. ...
Brain Electrical Activity | Contemplative StudiesBrain Electrical Activity | Contemplative Studies
Improve the Aging Brains Cognition with Mindfulness. By John M. de Castro, Ph.D.. "there is a small but growing body of evidence that regular meditation really can slow ageing - at least at the cellular level." - James Kingsland. Human life is one of constant change. We revel in our increases in physical and mental capacities during development, but regret their decreases during aging. The aging process involves a systematic progressive decline in every system in the body, the brain included. This includes our mental abilities which decline with age including impairments in memory, attention, problem solving ability, and emotion regulation. It is inevitable and cannot be avoided. There is some hope for these age-related declines, however, as there is evidence that they can be slowed. There are some indications that physical and mental exercise can reduce the rate of cognitive decline and lower the chances of dementia. For example, contemplative practices such as meditation, yoga, and tai chi or ...
PPT - Global Electroencephalography Equipment Market 2015-2019 PowerPoint presentation | free to download - id: 7fb253-OTcxYPPT - Global Electroencephalography Equipment Market 2015-2019 PowerPoint presentation | free to download - id: 7fb253-OTcxY
Global Electroencephalography Equipment Market 2015-2019, has been prepared based on an in-depth market analysis with inputs from industry experts. The report covers APAC, EMEA, and the America; it also covers the landscape of the global electroencephalography equipment market and its growth prospects in the coming years. The report includes a discussion of the key vendors operating in this market. – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7fb253-OTcxY
EEG | IEEE DataPortEEG | IEEE DataPort
Recent advances in scalp electroencephalography (EEG) as a neuroimaging tool have now allowed researchers to overcome technical challenges and movement restrictions typical in traditional neuroimaging studies. Fortunately, recent mobile EEG devices have enabled studies involving cognition and motor control in natural environments that require mobility, such as during art perception and production in a museum setting, and during locomotion tasks. ...
New tool offers unprecedented insight into brain electrical activityNew tool offers unprecedented insight into brain electrical activity
(Medical Xpress)-A team of researchers at Stanford University has announced the development of a new tool that they claim will offer unprecedented insight into the actions of neurons inside a living creature. In their paper ...
Results of the sLORETA analysis.Notes: The image shows | Open-iResults of the sLORETA analysis.Notes: The image shows | Open-i
Results of the sLORETA analysis.Notes: The image shows the sLORETA slices in the Talairach space for the estimated source of activation differences between CG a
Plus itPlus it
Post injury epilepsy (PIE) is a devastating sequela of various brain insults. While recent studies offer novel insights into the mechanisms underlying epileptogenesis and discover potential preventive treatments, the lack of PIE biomarkers hinders the clinical implementation of such treatments. Here we explored the biomarker potential of different electrographic features in five models of PIE. Electrocorticographic or intrahippocampal recordings of epileptogenesis (from the insult to the first spontaneous seizure) from two laboratories were analyzed in 3 mouse and 2 rat PIE models. Time, frequency, fractal and non-linear properties of the signals were examined, in addition to the daily rate of epileptiform spikes, the relative power of five frequency bands (θ, α, β, low- and high-γ), and the dynamics of these features over time.. During the latent, pre-seizure period, epileptiform spikes were more frequent in epileptic compared to non-epileptic rodents, however this feature showed limited ...
Cognitive scienceCognitive science
Ear-EEGEar-EEG
Panayiotopoulos syndromePanayiotopoulos syndrome
P300 (neuroscience)P300 (neuroscience)
HypsarrhythmiaHypsarrhythmia
Electrophysiological techniques for clinical diagnosisElectrophysiological techniques for clinical diagnosis
P3bP3b
Frontal lobe disorderFrontal lobe disorder
Cognitive neuroscience of musicCognitive neuroscience of music
Benzodiazepine overdoseBenzodiazepine overdose
Germ line developmentGerm line development
Alcohol use and sleepAlcohol use and sleep
José Manuel Rodriguez DelgadoJosé Manuel Rodriguez Delgado
Brainwave entrainmentBrainwave entrainment
N100N100
John Rothwell (physiologist)John Rothwell (physiologist)
P3aP3a
Euclid High SchoolEuclid High School
Hjorth parametersHjorth parameters
Positive NeurosciencePositive Neuroscience
Olfactory tubercleOlfactory tubercle
Case VanderwolfCase Vanderwolf
Robert Galbraith HeathRobert Galbraith Heath
Brain activity and meditationBrain activity and meditation
Mary BrazierMary Brazier
BioelectromagneticsBioelectromagnetics
Priming (psychology)Priming (psychology)
Research on meditationResearch on meditation
Evoked potentialEvoked potential
ElectrocorticographyElectrocorticography
AnatomyDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsInformation ScienceNamed GroupsHealth Care
ElectroencephalographyBrain WavesMagnetoencephalographyEpilepsies, PartialEpilepsyAlpha RhythmSeizuresSignal Processing, Computer-AssistedBrain MappingDelta RhythmBrainMagnetic Resonance ImagingCerebral CortexEvoked PotentialsBeta RhythmEvoked Potentials, VisualEvoked Potentials, SomatosensoryCortical SynchronizationStatus EpilepticusMonitoring, PhysiologicBrain-Computer InterfacesEvent-Related Potentials, P300Term BirthPersistent Vegetative StateScalpElectrooculographyEpilepsy, Frontal LobeSpasms, InfantileSleep StagesEpilepsy, GeneralizedConsciousness DisordersElectrodes, ImplantedSleepMonitoring, IntraoperativeEpilepsy, Tonic-ClonicArtifactsAnticonvulsantsReaction TimeEpilepsy, AbsenceWakefulnessCommunication Aids for DisabledPhotic StimulationTranscranial Magnetic StimulationElectrodesEpilepsy, Temporal LobeOccipital LobeEvoked Potentials, AuditoryEpilepsy, ReflexFunctional LateralityConsciousness MonitorsImage Processing, Computer-AssistedModels, NeurologicalHypoxia-Ischemia, BrainUnconsciousnessPsychomotor PerformanceMalformations of Cortical DevelopmentParietal LobeFrontal LobeEpilepsy, Complex PartialConsciousnessTheta RhythmContingent Negative VariationNerve NetBrain DiseasesElectroencephalography Phase SynchronizationAcoustic StimulationAnticipation, PsychologicalAttentionCognitionPoint-of-Care SystemsComaElectromyographyVisual PerceptionSleep DeprivationNeuropsychological TestsDiagnosis, Computer-AssistedSpectroscopy, Near-InfraredVideo RecordingUnnecessary ProceduresNeuroimagingArousalMotor CortexTemporal LobeAuditory PerceptionDiscriminant AnalysisNeurologic ExaminationCerebrovascular CirculationTime FactorsSleep, REMBrain IschemiaHeadNeural PathwaysAlgorithmsBehaviorEndarterectomy, CarotidInfant, NewbornAnalysis of VarianceReproducibility of ResultsHallucinationsHypothermia, InducedFourier AnalysisTask Performance and AnalysisMovementOxygenMemory, Short-TermSpectrum AnalysisDominance, CerebralSensitivity and SpecificityData Interpretation, StatisticalTomography, Emission-Computed, Single-PhotonPropofolBiological ClocksThalamusRetrospective StudiesAnesthetics, IntravenousHypnotics and SedativesNervous System DiseasesBrain InjuriesNeurosurgical ProceduresSchizophreniaUltrasonography, Doppler, TranscranialAuditory CortexPeriodicityPolysomnographyEvoked Potentials, MotorNonlinear DynamicsPredictive Value of TestsVisual CortexComputer SimulationPattern Recognition, VisualPrefrontal CortexProspective StudiesSomatosensory CortexCognition DisordersPositron-Emission TomographyTomography, X-Ray ComputedTreatment OutcomeUser-Computer InterfaceHippocampusDepressive Disorder, MajorEye MovementsRecognition (Psychology)Severity of Illness IndexImage Interpretation, Computer-AssistedMemoryCuesEmotionsStatistics as TopicMotor ActivityCase-Control Studies
EEG: ElectroencephalographyEEG: Electroencephalography
The Impact of Amplitude-Integrated Electroencephalography on NICU Practice.The Impact of Amplitude-Integrated Electroencephalography on NICU Practice.
Niedermeyers Electroencephalography: Basic Principles, Clinical Applications, and Related FieldsNiedermeyer's Electroencephalography: Basic Principles, Clinical Applications, and Related Fields
Intrinsic Connectivity Networks, Alpha Oscillations, and Tonic Alertness: A Simultaneous Electroencephalography/Functional...Intrinsic Connectivity Networks, Alpha Oscillations, and Tonic Alertness: A Simultaneous Electroencephalography/Functional...
UBIRA ETheses - Neurophysiological correlates of preparation for action measured by electroencephalographyUBIRA ETheses - Neurophysiological correlates of preparation for action measured by electroencephalography
PPT - Global Electroencephalography Equipment Market 2015-2019 PowerPoint presentation | free to download - id: 7fb253-OTcxYPPT - Global Electroencephalography Equipment Market 2015-2019 PowerPoint presentation | free to download - id: 7fb253-OTcxY
Efficacy of valproate on electroencephalography and obesity in children with epilepsy | AbstractEfficacy of valproate on electroencephalography and obesity in children with epilepsy | Abstract
Perceptual references for independent dimensions of speech quality as measured by electroencephalography, Quality and User...Perceptual references for independent dimensions of speech quality as measured by electroencephalography, Quality and User...
EEG ElectroencephalographyEEG Electroencephalography
Pharmaco-electroencephalography - WikipediaPharmaco-electroencephalography - Wikipedia
Quantitative electroencephalography - WikipediaQuantitative electroencephalography - Wikipedia
Electroencephalography | EcouterreElectroencephalography | Ecouterre
Electroencephalography | Encyclopedia.comElectroencephalography | Encyclopedia.com
electroencephalography: Brainwave Patterns | Infopleaseelectroencephalography: Brainwave Patterns | Infoplease
Clinical Electroencephalography | Oriano Mecarelli | SpringerClinical Electroencephalography | Oriano Mecarelli | Springer
electroencephalography - Science-Based Medicineelectroencephalography - Science-Based Medicine
Electroencephalography dictionary definition | electroencephalography definedElectroencephalography dictionary definition | electroencephalography defined
Jonathan Harris - Sacramento, CA - Electroencephalography (EEG) | Healthgrades.comJonathan Harris - Sacramento, CA - Electroencephalography (EEG) | Healthgrades.com
Electroencephalography Data Collection System | Ohio UniversityElectroencephalography Data Collection System | Ohio University
Electroencephalography - Simple English Wikipedia, the free encyclopediaElectroencephalography - Simple English Wikipedia, the free encyclopedia
Role of Electroencephalography in Presurgical Evaluation of Temporal Lobe EpilepsyRole of Electroencephalography in Presurgical Evaluation of Temporal Lobe Epilepsy
Electroencephalography (EEG) labsElectroencephalography (EEG) labs
Role of Electroencephalography in Presurgical Evaluation of Temporal Lobe EpilepsyRole of Electroencephalography in Presurgical Evaluation of Temporal Lobe Epilepsy
Electroencephalography | Technology TrendsElectroencephalography | Technology Trends
Electroencephalography (EEG) Systems - Global Market Outlook (2016-2022)Electroencephalography (EEG) Systems - Global Market Outlook (2016-2022)
Electroencephalography (EEG) Scan Definition & Test ResultsElectroencephalography (EEG) Scan Definition & Test Results
Anesthetic considerations for stereotactic electroencephalography implantationAnesthetic considerations for stereotactic electroencephalography implantation
Dr. Marat Avshalumov, PHD - Rockville Centre, NY - Electroencephalography (EEG) | Healthgrades.comDr. Marat Avshalumov, PHD - Rockville Centre, NY - Electroencephalography (EEG) | Healthgrades.com
electroencephalography | EUdict | English...electroencephalography | EUdict | English...
L03 Electroencephalography I | BIOPACL03 Electroencephalography I | BIOPAC
The Fundamental and Applied Electroencephalography Laboratory - University of PlymouthThe Fundamental and Applied Electroencephalography Laboratory - University of Plymouth
What is the role of electroencephalography in the treatment of central pontine myelinolysis (CPM)?What is the role of electroencephalography in the treatment of central pontine myelinolysis (CPM)?
Putting Electroencephalography (EEG) in the Emergency Department - Full Text View - ClinicalTrials.govPutting Electroencephalography (EEG) in the Emergency Department - Full Text View - ClinicalTrials.gov
Dissociating Perceptual Quality Dimensions of Transmitted Speech Using Electroencephalography - IEEE Conference PublicationDissociating Perceptual Quality Dimensions of Transmitted Speech Using Electroencephalography - IEEE Conference Publication
Medical Xpress - electroencephalographyMedical Xpress - electroencephalography
Related Specialties | Electroencephalography (EEG) | Main Line Health | Philadelphia, PennsylvaniaRelated Specialties | Electroencephalography (EEG) | Main Line Health | Philadelphia, Pennsylvania
Future Internet | Free Full-Text | Combining Facial Expressions and Electroencephalography to Enhance Emotion RecognitionFuture Internet | Free Full-Text | Combining Facial Expressions and Electroencephalography to Enhance Emotion Recognition
AnatomyDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsInformation ScienceNamed GroupsHealth Care
ElectroencephalographyBrain WavesMagnetoencephalographyEpilepsies, PartialEpilepsyAlpha RhythmSeizuresSignal Processing, Computer-AssistedBrain MappingDelta RhythmBrainMagnetic Resonance ImagingCerebral CortexEvoked PotentialsBeta RhythmEvoked Potentials, VisualEvoked Potentials, SomatosensoryCortical SynchronizationStatus EpilepticusMonitoring, PhysiologicBrain-Computer InterfacesEvent-Related Potentials, P300Term BirthPersistent Vegetative StateScalpElectrooculographyEpilepsy, Frontal LobeSpasms, InfantileSleep StagesEpilepsy, GeneralizedConsciousness DisordersElectrodes, ImplantedSleepMonitoring, IntraoperativeEpilepsy, Tonic-ClonicArtifactsAnticonvulsantsReaction TimeEpilepsy, AbsenceWakefulnessCommunication Aids for DisabledPhotic StimulationTranscranial Magnetic StimulationElectrodesEpilepsy, Temporal LobeOccipital LobeEvoked Potentials, AuditoryEpilepsy, ReflexFunctional LateralityConsciousness MonitorsImage Processing, Computer-AssistedModels, NeurologicalHypoxia-Ischemia, BrainUnconsciousnessPsychomotor PerformanceMalformations of Cortical DevelopmentParietal LobeFrontal LobeEpilepsy, Complex PartialConsciousnessTheta RhythmContingent Negative VariationNerve NetBrain DiseasesElectroencephalography Phase SynchronizationAcoustic StimulationAnticipation, PsychologicalAttentionCognitionPoint-of-Care SystemsComaElectromyographyVisual PerceptionSleep DeprivationNeuropsychological TestsDiagnosis, Computer-AssistedSpectroscopy, Near-InfraredVideo RecordingUnnecessary ProceduresNeuroimagingArousalMotor CortexTemporal LobeAuditory PerceptionDiscriminant AnalysisNeurologic ExaminationCerebrovascular CirculationTime FactorsSleep, REMBrain IschemiaHeadNeural PathwaysAlgorithmsBehaviorEndarterectomy, CarotidInfant, NewbornAnalysis of VarianceReproducibility of ResultsHallucinationsHypothermia, InducedFourier AnalysisTask Performance and AnalysisMovementOxygenMemory, Short-TermSpectrum AnalysisDominance, CerebralSensitivity and SpecificityData Interpretation, StatisticalTomography, Emission-Computed, Single-PhotonPropofolBiological ClocksThalamusRetrospective StudiesAnesthetics, IntravenousHypnotics and SedativesNervous System DiseasesBrain InjuriesNeurosurgical ProceduresSchizophreniaUltrasonography, Doppler, TranscranialAuditory CortexPeriodicityPolysomnographyEvoked Potentials, MotorNonlinear DynamicsPredictive Value of TestsVisual CortexComputer SimulationPattern Recognition, VisualPrefrontal CortexProspective StudiesSomatosensory CortexCognition DisordersPositron-Emission TomographyTomography, X-Ray ComputedTreatment OutcomeUser-Computer InterfaceHippocampusDepressive Disorder, MajorEye MovementsRecognition (Psychology)Severity of Illness IndexImage Interpretation, Computer-AssistedMemoryCuesEmotionsStatistics as TopicMotor ActivityCase-Control Studies
BrainFMRIStudyRecordingAnalysisResearchAmplitude-integrated electroencephalographyNear-infrared speGlobal Electroencephalography Equipment marketQuantitativeFacial Expressions and ElectroencephalographySingle-channel electroencephalographyRole of ElectroencephalographyNeuroscienceClinicalStereo-electroencephalographyInpatient electroencephalographyElectromyography2016North AmericaNeonatalFunctional2020ContinuousClassificationNeurophysiologyIctalNeurophysiologicalCerebralElectroencephalogramMedical illustrationTechniqueDiagnosticMarketCortex
Brain4
FMRI1
  • We used simultaneous acquisition of functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) in the absence of any paradigm to test an ensuing hypothesis, namely that spontaneous fluctuations in this ICN′s activity (as measured by fMRI) should show a positive correlation with the electrical signatures of tonic alertness (as recorded by concurrent EEG). (jneurosci.org)
Study1
  • In the research presented in this thesis, I employed high-density electroencephalography in order to study the neural processes underlying preparation for action. (bham.ac.uk)
Recording1
Analysis1
  • Global Electroencephalography Equipment Market 2015-2019, has been prepared based on an in-depth market analysis with inputs from industry experts. (powershow.com)
Research1
  • Research analysts forecast the global electroencephalography equipment market to grow at a CAGR of 7.34 during 2014-2019. (powershow.com)
Amplitude-integrated electroencephalography8
Near-infrared spe3
Global Electroencephalography Equipment market7
Quantitative5
Facial Expressions and Electroencephalography1
Single-channel electroencephalography2
Role of Electroencephalography1
Neuroscience1
  • Terry Daugherty, Ernest Hoffman, Kathleen Kennedy, and Megan Nolan (2014) ,"Consumer Neuroscience: Testing Effectual Advertising Using Dense-Array Electroencephalography", in NA - Advances in Consumer Research Volume 42, eds. (acrwebsite.org)
Clinical6
  • His main area of interest is electroencephalography and clinical epileptology. (springer.com)
  • This comprehensive atlas presents the clinical practice of neonatal electroencephalography (EEG) through text, references, and detailed figures demonstrating normal and abnormal features of the neonatal EEG from the most premature infant to one month post-term. (springerpub.com)
  • Early Detection of Preterm Intraventricular Hemorrhage From Clinical Electroencephalography. (lu.se)
  • This thesis presents the results of investigating the applicability of objective electrophysiological metrics for assessing CI performance, introducing a new approach to reduce the effect of electrical artefact in CI electroencephalography recordings (EEG), deriving new neural based correlates of CI performance and evaluating them in a clinical environment. (tcd.ie)
  • The prevalence of epileptiform activity in individuals with ASD and no clinical history of seizures is approximately 6% to 30% and is dependent on the type of electroencephalography (EEG) study done, the length of the EEG recording, methodology specific to collecting and interpretation of EEGs, and the specific population of children with ASD being studied. (oxfordmedicine.com)
  • The Electromyography (EMG), Electroencephalography (EEG), and Neurophysiology in Clinical Practice 2020 will be held in Phoenix, AZ, United States on 26-31 January 2020. (clocate.com)
Stereo-electroencephalography8
Inpatient electroencephalography2
Electromyography2
20161
North America2
  • North America dominated the Electroencephalography systems market which can be attributed to increasing occurrence of various sleep & neurodegenerative disorders and accessibility to insurance. (medindia.net)
  • This report focuses on the Electroencephalography Equipment in Global market, especially in North America, Electroencephalography Equipment Market in Europe and Asia-Pacific, Electroencephalography Equipment Market in Latin America, Electroencephalography Equipment Market in Middle and Africa. (beforeitsnews.com)
Neonatal2
Functional2
  • electroencephalography ( EEG ) and functional MRI to observe the neurophysiological indices surrounding performance. (humankinetics.com)
  • We used simultaneous acquisition of functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) in the absence of any paradigm to test an ensuing hypothesis, namely that spontaneous fluctuations in this ICN′s activity (as measured by fMRI) should show a positive correlation with the electrical signatures of tonic alertness (as recorded by concurrent EEG). (jneurosci.org)
20201
Continuous1
  • A continuous video-electroencephalography (EEG) recording, and/or diligent direct observation, facilitates quantification of exact duration of different stages of convulsive seizures (Racine stages 3-5) to determine the severity of SE. (frontiersin.org)
Classification1
  • ACT-R » Publications » Stages of Processing in Associative Recognition: Evidence from Behavior, Electroencephalography, and Classification. (cmu.edu)
Neurophysiology1
  • Featuring current developments from the field, this book covers every aspect of electroencephalography - from history to neurophysiology, to the most. (slugbooks.com)
Ictal1
Neurophysiological1
  • Electroencephalography (EEG) forms the basis of multiple neurophysiological techniques and is a powerful diagnostic tool. (edu.au)
Cerebral1
  • Specific patterns of psychophysiological activity from the cerebral cortex, in the form of event-related slow potentials (SPs), as well as spectral content measured by electroencephalography (EEG), occur in the few seconds of performance (preshot) preparation. (humankinetics.com)
Electroencephalogram1
Medical illustration1
Technique1
  • Endovascular electroencephalography: the technique and its application during carotid amytal assessment. (bmj.com)
Diagnostic1
Market6
Cortex1
  • Worden MS, Foxe JJ, Wang N et al (2000) Anticipatory biasing of visuospatial attention indexed by retinotopically specific alpha-band electroencephalography increases over occipital cortex. (springer.com)
JCDR - Convulsions, Electroencephalography changes, Paroxysmal abdominal pain, Spike wave pattern
JCDR - Convulsions, Electroencephalography changes, Paroxysmal abdominal pain, Spike wave pattern (jcdr.net)
Is streamlined evaluation of children for epilepsy surgery possible? - Patil - 2008 - Epilepsia - Wiley Online Library
Is streamlined evaluation of children for epilepsy surgery possible? - Patil - 2008 - Epilepsia - Wiley Online Library (onlinelibrary.wiley.com)
Nervous System | Encyclopedia.com
Nervous System | Encyclopedia.com (encyclopedia.com)
How Is Intraoperative Neurophysiological Monitoring Performed?
How Is Intraoperative Neurophysiological Monitoring Performed? (medicinenet.com)
Clinical Electroencephalography | Oriano Mecarelli | Springer
Clinical Electroencephalography | Oriano Mecarelli | Springer (springer.com)
HIV Encephalopathy and AIDS Dementia Complex: Overview, Pathophysiology, Epidemiology
HIV Encephalopathy and AIDS Dementia Complex: Overview, Pathophysiology, Epidemiology (emedicine.medscape.com)
Alzheimer Disease in Down Syndrome: Overview, Pathophysiology/Risk Factors, Epidemiology
Alzheimer Disease in Down Syndrome: Overview, Pathophysiology/Risk Factors, Epidemiology (emedicine.medscape.com)
Temporal Lobe Epilepsy Workup: Approach Considerations, Computed Tomography Scanning, Magnetic Resonance Imaging
Temporal Lobe Epilepsy Workup: Approach Considerations, Computed Tomography Scanning, Magnetic Resonance Imaging (emedicine.medscape.com)
Ependymoma Workup: Approach Considerations, Imaging Studies, Procedures
Ependymoma Workup: Approach Considerations, Imaging Studies, Procedures (emedicine.medscape.com)
EEG - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
EEG - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
VideoEEG - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
VideoEEG - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
MCSCap - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
MCSCap - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
IJERPH | Free Full-Text | Real Foliage Plants as Visual Stimuli to Improve Concentration and Attention in Elementary Students ...
IJERPH | Free Full-Text | Real Foliage Plants as Visual Stimuli to Improve Concentration and Attention in Elementary Students ... (mdpi.com)
Imperial College Clinical Imaging Facility | Faculty of Medicine | Imperial College London
Imperial College Clinical Imaging Facility | Faculty of Medicine | Imperial College London (imperial.ac.uk)
Opening the Black Box of the Brain
Opening the Black Box of the Brain (ascd.org)
Electroencephalography Archives - First Coast Hearing Clinic
Electroencephalography Archives - First Coast Hearing Clinic (firstcoasthearing.com)
Augmented Cognition. Neurocognition and Machine Learning | SpringerLink
Augmented Cognition. Neurocognition and Machine Learning | SpringerLink (link.springer.com)
Robert S. Ogilvie | Open Library
Robert S. Ogilvie | Open Library (openlibrary.org)
Epilepsy Pathophysiology
Epilepsy Pathophysiology (news-medical.net)
Occupational Neurology - Read Online
Occupational Neurology - Read Online (scribd.com)
Frontiers | Sensor Measures of Affective Leaning | Psychology
Frontiers | Sensor Measures of Affective Leaning | Psychology (frontiersin.org)
Frontiers | Exogenous Cortisol Administration; Effects on Risk Taking Behavior, Exercise Performance, and Physiological and...
Frontiers | Exogenous Cortisol Administration; Effects on Risk Taking Behavior, Exercise Performance, and Physiological and... (frontiersin.org)
Frontiers | Connecting Deep Neural Networks to Physical, Perceptual, and Electrophysiological Auditory Signals | Neuroscience
Frontiers | Connecting Deep Neural Networks to Physical, Perceptual, and Electrophysiological Auditory Signals | Neuroscience (frontiersin.org)
Surgery and Cognition | The New York Academy of Sciences
Surgery and Cognition | The New York Academy of Sciences (nyas.org)
Epilepsy and Seizures Workup: Approach Considerations, Prolactin Study, Serum Studies of Anticonvulsant Agents
Epilepsy and Seizures Workup: Approach Considerations, Prolactin Study, Serum Studies of Anticonvulsant Agents (emedicine.medscape.com)
EEGStudio DSA trend graphs - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
EEGStudio DSA trend graphs - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
Frontiers | Mental Fatigue Alters Cortical Activation and Psychological Responses, Impairing Performance in a Distance-Based...
Frontiers | Mental Fatigue Alters Cortical Activation and Psychological Responses, Impairing Performance in a Distance-Based... (frontiersin.org)
Epilepsy - Seizure Types, Symptoms and Treatment Options
Epilepsy - Seizure Types, Symptoms and Treatment Options (aans.org)
Electroencephalography - Science-Based Medicine
Electroencephalography - Science-Based Medicine (sciencebasedmedicine.org)
Frontiers | Using Brain Oscillations and Corticospinal Excitability to Understand and Predict Post-Stroke Motor Function |...
Frontiers | Using Brain Oscillations and Corticospinal Excitability to Understand and Predict Post-Stroke Motor Function |... (frontiersin.org)
SmartBCI-24 EEG Cap Rev1 - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
SmartBCI-24 EEG Cap Rev1 - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
SmartBCI-24 EEG Cap Rev2 - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
SmartBCI-24 EEG Cap Rev2 - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
IBrain startup and SmartBCI technology - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG)
IBrain startup and SmartBCI technology - Mitsar :: Neurodiagnostics :: Electroencephalography (EEG) (mitsar-eeg.com)
October 1959 - Volume 14 - Issue 5 : Obstetrical & Gynecological Survey
October 1959 - Volume 14 - Issue 5 : Obstetrical & Gynecological Survey (journals.lww.com)