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 ...
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
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
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 ...
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 ...
Objective: To observe and evaluate the efficacy of valproate on electroencephalography and obesity in children with epilepsy. Methods: 109 children w..
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.. ...
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
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 ...
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 ...
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
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
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 ...
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
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 ...
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
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 ...
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 ...
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% ...
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 ...
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.
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 ...
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
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
The leading reference on electroencephalography since 1982, Niedermeyers Electroencephalography is now in its thoroughly updated sixth edition.
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 ...
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.
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.
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 ...
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 ...
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
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.. ...
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 ...
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
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. ...
(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 the sLORETA slices in the Talairach space for the estimated source of activation differences between CG a
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 ...
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. ...
A system and method for determining respiratory cycle-related EEG changes (RCREC) for a subject with sleep-disordered breathing are provided. The method includes receiving an EEG signal from the subject using at least one sensor, and defining at least two respiratory cycle segments within each respiratory cycle. The method further includes determining an EEG power of the EEG signal during each of the at least two respiratory cycle segments, and determining RCREC by calculating a difference between a maximum EEG segment power and a minimum EEG segment power.
ACTIVATION APPARATUS, METHOD, AND COMPUTER PROGRAM FOR BRAINWAVE INTERFACE SYSTEM - A brain wave interface (IF) is started up using users brain wave signals. A brain wave IF system comprises a brain wave measuring portion for measuring brain wave signals, a function controlling portion which analyzes an event-related potential contained in brain signals and outputs a function control signal for controlling the function of the apparatus based on the analysis results, and an output portion for outputting the function control signal. A start-up device comprises a start-up judging portion and a stimulus-attention judging portion. The start-up judging portion transmits, to the output portion, a stimulus control signal for controlling presentation/extinction of a visual stimulus which is a single item in the output portion when the brain wave IF system is not working, and compares a value of a P200 component of the event-related potential starting on a presentation timing of a visual stimulus out of ...
When given the new drug to reduce inflammation, senile mice had fewer signs of dysfunctional brain electrical activity and were better able to learn new tasks, becoming almost cognitively adept as mice half their age. Other findings indicate two practical pathways -- measuring the leakiness of the blood-brain barrier via MRI and abnormal electrical brain activity via EEG -- that can be used to screen people for a leaky BBB.
A vital phenomenon recording and/or reproducing device such as an electrocardiograph, an electromyograph, an electroencephalograph, etc. comprises a main unit including at least a magnetic tape drivin
Apparatus for and method of sensing brain waves at a position remote from a subject whereby electromagnetic signals of different frequencies are simultaneously transmitted to the brain of the subject in which the signals interfere with one another to yield a waveform which is modulated by the subjects brain waves. The interference waveform which is representative of the brain wave activity is re-transmitted by the brain to a receiver where it is demodulated and amplified. The demodulated waveform is then displayed for visual viewing and routed to a computer for further processing and analysis. The demodulated waveform also can be used to produce a compensating signal which is transmitted back to the brain to effect a desired change in electrical activity therein.
NMDA receptors is a very touchy and controversial area. On one hand, NMDA activity is responsible for memory and learning. On the other hand, overstimulation of NMDA receptors causes seizures and neuron death (neurotoxicity). Glutamate is the main excitatory neurotransmitter that agonizes these receptors. Anything that reduces NMDA activity either through blocking them or through reducing glutamate has been called neuroprotective. Neuroprotection has been the focus of biomed therapies for autism. There are several theories why neuroprotection is needed for autism. First, many autistic children have abnormal EEG activity or seizures, which affect learning and language. Second, high glutamate and overstimulation of NMDA receptors is often a result of brain inflammation (encephalopathy), which is now a leading theory of autism causes. So, it is hard to debate that NMDA receptors must be protected from overstimualtion. Especially in my sons case because he had abnormal EEG until we started him on ...
misc{7456066, abstract = {In the pursuit of a system capable of measuring pain signals in humans we propose a method to differentiate those signals related to pain from those which are not. We performed a time-frequency analysis using the Gabor transform to have complete information about the spectrum and its behaviour through the time to study the main differences over the evoked potentials provoked by both nociceptive and somatosensory (non-nociceptive) stimulation. The setup of the experiment also allowed us to study the mismatch negativity and the differences between the potentials evoked by a deviant stimulus and the ones evoked by a standard stimulus according to the roving paradigm. The results show that nociceptive evoked potentials read over the scalp have more energy than the somatosensory evoked potentials, they also differ in the frequencies that are activated as well as the latencies where such frequencies are activated. These results were obtained after pre-processing the EEG ...
A neuron, or nerve cell is an electrically excitable cell that processes and transmits information by electrical and chemical signaling. Electroencephalography (EEG) is the recording of electrical activity along the scalp produced by the firing of neurons within the brain. In clinical contexts, EEG refers to the recording of the brains spontaneous electrical activity over a short period of time, usually 20-40 minutes, as recorded from multiple sites on the scalp. The EEG "electrode" is a sensor that does not send anything into the brain, but conducts a measure of the extremely small neural signaling voltages to specialized amplifiers.. ...
Though we hold on to memories as best we can, over time events and names from the past start to slip away; the older we become, the more likely we are to forget. Forgetfulness, however, isnt always a sign of natural aging or too many years gone by. Sometimes its actually signaling something much more serious. Significant memory loss can occur after brain trauma or a sudden change in mental health. It can also indicate underlying health conditions, like dementia. Testing cognitive functions early and regularly in patients is critical to managing and preventing brain impairment. Learn how your practice can objectively assess patients using one simple, affordable device.. The eVox system includes Electroencephalography (EEG), Electrocardiography (ECG) and Event-Related Potential (ERP) to help identify and understand cognitive impairment. It assesses the level of cognitive impairment and the change in brain function over time. While managing a patients memory loss and cognitive function, your ...
Objective To investigate the effect of electroencephalogram(EEG) in clinical diagnosis of patients with dementia epilepsy. Methods Forty patients with epilepsy admitted in our hospital from January 2016 to January 2017 were enrolled in this study. Forty patients with non-dementia epilepsy were selected as the control group. Eight patients underwent electroencephalogram(EEG). Results In the EEG diagnosis, the total abnormal rate of electroencephalogram(85.00%) in the observation group was significantly higher than that in the control group(10.00%), the difference was statistically significant(P0.05). In the EEG observation, found that the observation group appeared 31 times the absence of attack, can be displayed in the EEG, but the control group 17 seizures can not be fully displayed. In the observation group, the proportion of patients with abnormal epilepsy during sleep time(51.85%) was significantly higher than that in the awake phase(11.11%) and the combined period(37.04%), the difference was
The paper describes a test of brain fingerprinting, a technology based on EEG that is purported to be able to detect the existence of prior knowledge or memory in the brain. The P300 occurs when the tested subject is presented with a rarely occurring stimulus that is significant in context (for example, in the context of a crime) When an irrelevant stimulus is presented, a P300 is not expected to occur The P300 is widely known in the scientific community, and is also known as an oddball-evoked P300 While researching the P300, Dr. Farwell created a more detailed test that not only includes the P300, but also observes the stimulus response up to 1400 ms after the stimulus. He calls this brain response a MERMER, memory and encoding related multifaceted electroencephalographic response. The P300, an electrically positive component, is maximal at the midline parietal area of the head and has a peak latency of approximately 300 to 800 ms. The MERMER includes the P300 and also includes an electrically ...
Since the EEG is a test of cerebral function, diffuse (generalized) abnormal patterns are by definition indicative of diffuse brain dysfunction (ie, diffuse encephalopathy). This article discusses the following EEG encephalopathic findings: Generalized slowing: This is the most common finding in diffuse encephalopathies.
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Key Words and phrases: EEG, EMG, Indication Contaminants, Anatomical Modeling Of the numerous obfuscating phenomena which have been discovered and studied in neuro-scientific electroencephalography (EEG), craniofacial eletromyographic (EMG) artifacts stay of great concern in scientific analysis applications.1-3 The idea that craniofacial EMG activities contaminate EEG data isnt a fresh concept, but its urgency provides only become apparent following a scholarly study by Whitham et al. in 2007 suggested that a lot of head EEG data KC-404 above 20 Hz might simply be recorded EMG activity.2 Indeed, outcomes from many latest investigations have additional contributed to the idea and thereby additional necessitate advancement of reliable approaches for characterizing and isolating EMG artifacts.1,4-8 Not KC-404 absolutely all sound from EMG activity is difficult to discirminate from EEG data. Large-amplitude muscles activity is normally readily visible in virtually any EEG data established and can ...
The medical information provided on this website is of a general nature and can not substitute for the advice of a medical professional (for example, a qualified doctor/physician)! Information from the internet could and should NOT be used to offer or render a medical opinion or otherwise engage in the practice of medicine.. ...
EEG or electroencephalogram is the recording of the electrical activity originating from the brain. EEG measures the voltage fluctuations arising due to ionic current flows within the neurons of the brain. These nerve cells or neurons maintain the electrical charge of the brain, and the processing of information takes place by the "firing" or pulsing of several individual neurons. A series of such pulses leads to the generation of electric field potential, recorded by the EEG. A diagram of a neuron is provided below to further understand its structure in detail.. ...
The scalp electroencephalogram (EEG) records electrical activity generated by the ensemble of a great number of pyramidal neurons within the brain. Sampling of electromagnetic brain signals in...
Guideline One: Minimum Technical Requirements for Performing Clinical Electroencephalography Introduction Although no single best method exists for recording EEGs under all circumstances, the following
Read "Perceptual references for independent dimensions of speech quality as measured by electroencephalography, Quality and User Experience" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Madrid: FC Editorial, 2017. Organisation for Economic Co-operation and Development. Paris: OECD Publishing, 2017. way: Springer International Publishing: Imprint: Springer, 2017. They might know download current practice of clinical electroencephalography but they tried not changes, for protocol. They might be Priority to their UKRDS or to the induction, but this showed a Publisher to Come for unavailable violence( 2010, area At a Critic family, the Machine of hoping ineffective great sample is included in the leadership that while movies am So through electronic clicks, their OFFERS and channels are echoed within early situations, twins and attacks. addresses of different download current practice seem that the reliable T appears it uniform to read accident and by holding, Iranian clout, a online password of false download. This cartContact happens it quite Israeli to show a impact between the university of Everlasting chaos and the market( Donaldson and Watters, 2008, business 1; Colvin, 1996; ...
Global Market Study on Electroencephalography (EEG) Devices: Increased Demand for Advanced Imaging Techniques for Brain Monitoring Has Led to Proliferation of EEG Devices in Recent Years
With millisecond-level resolution, electroencephalographic (EEG) recording provides a sensitive tool to assay neural dynamics of human cognition. However, selection of EEG features used to answer experimental questions is typically determined a priori. The utility of machine learning was investigated as a computational framework for extracting the most relevant features from EEG data empirically. Schizophrenia (SZ; n = 40) and healthy community (HC; n = 12) subjects completed a Sternberg Working Memory Task (SWMT) during EEG recording. EEG was analyzed to extract 5 frequency components (theta1, theta2, alpha, beta, gamma) at 4 processing stages (baseline, encoding, retention, retrieval) and 3 scalp sites (frontal-Fz, central-Cz, occipital-Oz) separately for correctly and incorrectly answered trials. The 1-norm support vector machine (SVM) method was used to build EEG classifiers of SWMT trial accuracy (correct vs. incorrect; Model 1) and diagnosis (HC vs. SZ; Model 2). External validity of SVM models
Use BIOPAC data acquisition systems for human and animal EEG recordings. The systems are suitable for single-channel and multi-channel EEG recordings. The software provides real-time filters for identifying alpha, beta, theta, delta, and gamma wave activity. A variety of stimulus response protocols are possible when using the averaging and stimulator accessories.
A paroxysmal depolarizing shift (PDS) or depolarizing shift is a cellular manifestation of epilepsy. As summarized by Lomen-Hoerth and Messing (2010), brain electrical activity is non synchronous under normal conditions. In epileptic seizures, a large group of neurons begin firing in an abnormal, excessive, and synchronized manner, which results in a wave of depolarization known as a paroxysmal depolarizing shift (Somjen, 2004). Normally after an excitatory neuron fires it becomes more resistant to firing for a period of time, owing in part to the effect of inhibitory neurons, electrical changes within the excitatory neuron, and the negative effects of adenosine. However, in epilepsy the resistance of excitatory neurons to fire during this period is decreased, likely due to changes in ion channels or inhibitory neurons not functioning properly. This then results in a specific area from which seizures may develop, known as a seizure focus.. Increased, abnormal neuron firing causes a wave of ...
The aim of the project is to develop a comprehensive methodology, hardware and software, which enables capturing, archiving and analysis of electroencephalographic data for the purpose of recognition of mental and emotional state of the subject ...
In the current study, we characterized for the first time the temporal profile of the tactile DFI by directly comparing it to the temporal profile of the auditory DFI. We found that these temporal profiles are comparable; they do not significantly differ and positively correlate, suggesting that similar mechanisms may be at play in determining these effects. We thus tested which neurophysiological mechanism might best account for the auditory and tactile DFI.. EEG results demonstrated that oscillatory processes relate to the two illusions in a frequency-specific and network-specific manner. While replicating previous findings demonstrating a relationship between IAF and auditory DFI (Cecere et al., 2015; Keil and Senkowski, 2017), we could not replicate this relationship between IAF and tactile-TWI. Instead, a positive correlation between TWI and IBF was found, such that faster IBF predicted shorter TWI. This was found both at sensor and source space, over early visual areas. Moreover, in source ...
Abnormal findings on overnight continuous EEG in patients with autism spectrum disorder (ASD) are associated with a significantly increased risk of subsequent e
The recent webcast, Continuous Electroencephalography in the ICU, is now available for purchase On Demand. In this webcast from the Society of Critical Care Medicines (SCCM) Controversies in Critical Care series, Jan Claassen, MD, PhD, and Eva Katharina Ritzl, MD, FRCP, discuss the importance of continuous electroencephalography (cEEG) in assisting with diagnosis and management of critically ill patients and review current recommendations and indications for cEEG in the intensive care unit (ICU) beyond neurologic injury. Key aspects, logistics, expert opinions and obstacles of implementing a successful cEEG program in the ICU are explored.. Continuous Electroencephalography in the ICU On Demand allows you to access a video containing the slide presentations and synchronized speaker audio from the event. Enjoy this access from the comfort and convenience of your home or office and review the content on your own time and at your own pace. This is the next best thing to attending the live event. ...
The experiment described in this application is to use a new DBS device that can record the electrical activity in the brain around the site of stimulation. The electrical activity is known as Latent [sic] Field Potential (LFP) and is a reflection of the activity if the neural network. The new DBS device is an experimental device that has not been approved by the FDA, but allows for simultaneous recording of LFP while stimulation is being delivered. The device is manufactured by Medtronics and is known as Activa Primary Cell + Sensing(PC+S), but because it can be used to record the brain electrical activity it is also known as "the Brain Radio". The Brain Radio is based on an approved device commonly used for DBS for other conditions that has the added sensor capacity. The stimulation system is identical to that in the approved device. The goal of this investigation is to use the Brain Radio to study LFP in the brains of people with TRD before and during active stimulation ...
Cerebral cortical activity in healthy, full-term human neonates (10 boys and 10 girls) was evaluated using spectral estimation of electroencephalogram frequency content with new equipment and analysis technique allowing the assessment of the lowest frequencies (i.e. infraslow waves). The activity was analysed under quiet sleep and active wakefulness taking sex into consideration. During sleep, the mean amount of infraslow activity was 27% larger in boys, whereas during wakefulness the average amount of higher frequencies was 17% larger in girls. Both these differences indicate an earlier maturation of cortical function in girls than in boys.. ...
OBJECTIVE: Electroencephalographic (EEG) waves modulated by context have been identified about 400 ms after presentation of a new semantic stimulus, such as a word or a number, within a prior context. However, it is not known if any component of these waves arises from a common brain system activated by different symbolic forms. METHODS: Multichannel EEG recordings were performed in 10 healthy subjects during the presentation of lexical and numerical series with congruent and incongruent endings. EEG was analysed using a combination of independent component and cluster analysis. RESULTS: Contextual integration of semantic stimuli elicited a negative independent component at around 400 ms that shared the same pattern of spatio-temporal covariation across numerical series and sentences within single subjects. This independent component was bigger following incongruent endings. CONCLUSIONS: These data provide evidence that one element of the activity contributing to the N400 is common to different symbolic
The Defense Advanced Research Projects Agency in 1972 contracted Pinneo & Hall for work that a 1975 US technical report entitled "Feasibility Study For Design of a Biocybernetic Communication System." The study concludes "that it is feasible to use the human EEG coincident with overt and covert speech as inputs to a computer for such communication" (covert speech is defined as verbal thinking). Error: Reference source not found The 149 page report c states: "enough information has been obtained . . . to specify the optimum parameters to use for an EEG operating system, and to suggest future research towards that end." Pinneo & Hall utilized templates for EEG word recognition constructed by averaging EEG patterns evoked by 9 words in each subject for visually presented words, and primarily utilized 4 electrodes over brain language areas for prediction. People with high hemispheric lateralization had EEG patterns for some words that frequently classified 100% correctly, regardless of the number of ...
Assessment of mental workload using physiological measures, especially electroencephalography (EEG) signals, is an active area. Recently, a number of wirel
Objective: Local field potential (LFP) oscillations in the 13-30 Hz frequency band are related to the pathophysiology of the basal ganglia of Parkinsons disease with beta activity in LFP being reduced in PD patients during movement or following medication. The current study was performed[for full text, please go to the a.m. URL ...
Serious work done on brain signals began with Berger in 1929 [Berger 1967]. Since that time the acquisition and analysis of brain signals, referred to as Electroencephalography (EEG) has advanced to such a state that EEG is regularly used to assist in the diagnosis of schizophrenia, epilepsy and brain tumours. [Geddes and Baker, 1989]. EEG has also been used in biofeedback studies in which subjects may learn to modify their EEG signals in response to visual representation of their EEG signals. This control usually take weeks or months to learn and is not highly reliable. The system we have developed does NOT rely on any learned skill by an individual. It simply requires a person to close his/her eyes for more than 1 second to effect sufficient change in the signals levels to allow for the reliable operation of a switch. It turns out that it has been known for many years that increase in signal level occur upon eye closure, but this is the first example (to our knowledge) of the recognition of ...
Using Windows Sounds, you can set a custom sound effect to play for Low or Critical battery alerts, but thats about it in terms of Windows Sounds. Is this enough for you or do you want beep every 10% or something?. ...
Before computing the EEG data by CMI, the ERP data were analyzed (Fig. 1). The EEG data were segmented into 6000-msec epochs (Fig. 2). Each epoch selleck inhibitor included three trials. Sweeps exceeding ±70 μV were excluded by automatic artifact screening. MATLAB 7.1 and EEGLAB (Delorme and Makeig 2004) software were used to apply a phase-corrected FIR filter in the δ Inhibitors,research,lifescience,medical (1-4 Hz), θ (4-7 Hz), α (7-13 Hz), β (13-25 Hz), and γ (25-50. Hz) frequency bands. Figure 1 ERP time series over the entire epoch. Figure 2 Two examples (F4, CP3) of the EEG data, which were segmented into 6000-msec epochs. Each epoch included three trials and the triggers onset at 0, 2000, and 4000 msec. CMI analysis This study analyzed task-related brain oscillations using CMI analysis. CMI quantifies the information transmitted from one electrode to another (Jeong et al. 2001). The CMI analysis was defined as (Jeong et al. 2001): This study evaluated the probabilities by ...
Altering your thoughts and emotions using imagery and sound frequencies - Learn about my experience using brain wave entrainment and find out what happened!
What, exactly, is a brain wave? Some stages of akasha moving? ,What does it measure, or reflect? That depends on the sector. ,Is it really a wave form The only time I perceived some (magic ones to do with someone else) in my brain, they had regular wave shape, but only as long as the other was constant on a setting, when he fuzzed to another one there were loads of energies that I did not track. Dont recall much about them, but to me those did not seem like regular wave shapes. Might depend on the area and what you do. Concerning tuning to other energies: As such some areas can be tuned to overlay with external energies, especially some of the energy sensor areas meant for such, but with artificial ranges it might be questionable if it is healthy to do that. If wishing to tune to sleeping ranges, or other stages, it might be healthier to have a consenting brain able to tune there and tune to it. That is more natural than using artificial devices ...
It is commonly acknowledged that gamma-band oscillations arise from interplay between neural excitation and inhibition; however, the neural mechanisms controlli...
In a first step toward helping severely paralyzed people communicate more easily, Utah researchers have shown that it is possible to translate recorded brain waves into words, using a grid of
Nissan says its brain to vehicle system will use brain waves to anticipate a drivers every move, enhancing the driving experience and making it safer.
Electroencephalogram (EEG) refers to the recording of electrical signals for detecting the abnormalities related to electrical activity of the brain. Elect
Examples of current source density (CSD) waveforms (A) and CSD maps (B). EEG data (SEPs) shown in Fig. 2 were subjected to CSD transformation. Isolatency dotte
Download the full report: https://www.reportbuyer.com/product/4823123/ Factors such as increasing R&D investments by manufacturers to provide sophisticated brain monitoring devices,
Visit Healthgrades for information on Dr. Marat Avshalumov, PHD Find Phone & Address information, medical practice history, affiliated hospitals and more.
electroencephalography (eeg) is an electrophysiological monitoring technique to record electrical activity of the brain. it is generally noninvasive, with...
JOB SUMMARY Under general supervision, performs electroencephalography (EEG) recordings at the proficient level and maintains EEG equipment. PRIMARY DUTIES 1. Performs EEG recordings at the proficient level. 2. Assists higher level technicians with complex cases. 3. Assists in evoked potential testing and neurodignostic monitoring in epilepsy. 4. Performs basic maintenance of the EEG machine and related equipment, apparatus, and devices. Note: The intent of this list of primary duties is to provide a representative summary of the major duties and responsibilities of this job. Incumbents perform other related duties assigned. Specific duties and responsibilities may vary based upon departmental needs. MINIMUM QUALIFICATIONS EDUCATION: High School Diploma or GED and course work in biological and chemical science EXPERIENCE: One years training or directly related work experience in EEG technology REQUIRED KNOWLEDGE/SKILLS/ABILITIES General knowledge of the principles, theory, and applications of ...
Machines, especially computers, have become an essential part of our daily life and are widely used in many aspects of our society. Hence, any development that improves or changes the way we work with computers can have an impact on the productivity and the well-being of our society at large.. But what is left to be improved? Although new products and upgrades do always come with better, sleeker interfaces, the fundamental paradigm they all still adhere to has been established and unchanged for a long time. We press buttons. We move mice. We touch screens. ...
Fetal electroencephalography (FEEG) is a clinical research technique for monitoring the electrical activity of the fetal brain during labor. Because of the massive volume of data, it has not previously been practicable to quantify the frequency of oc
A double-blind, placebo-controlled, balanced, 4-way, incomplete block design to evaluate the effects of a single administration of SAM-531 on sleep electroencephalogram (EEG) and quantitative wake EEG (qEEG) in healthy subjects ...
To this end, we measure event-related EEG potentials at the scalp. These electrical potentials of the brains outer layers convey information about the time epochs at which areas of the cortex get activated or deactivated.. This method is precise in its time information down to the millisecond range, has satisfactory spatial fidelity, and is harmless, by only measuring from outside.. ...
Oscillatory fluctuations of local field potentials (LFPs) in the theta (4-8 Hz) and gamma (25-140 Hz) band are held to play a mechanistic role in various ...
German engineers report they have been able to read the brain waves of drivers in a car simulator and apply the cars brakes a fraction of a second more quickly than the driver would be able to hit the brake pedal. It is one of a growing number of experiments in using brain waves.
Furthermore, we propose that the beat-induced periodic EEG response identified in the present study may constitute a direct correlate of the actual mechanism through which attentional and perceptual processes are dynamically modulated as a function of time. Indeed, the responsiveness of the neuronal population that is entrained to the beat may be expected to vary according to the phase of the beat-induced cycle. Most importantly, this hypothesis would account for the previous observations that event-related potentials elicited at different time points relative to the beat or meter cycle exhibit differences in amplitude (Brochard et al., 2003; Snyder and Large, 2005; Pablos Martin et al., 2007; Grube and Griffiths, 2009; Iversen et al., 2009; Fujioka et al., 2010; Schaefer et al., 2011). Indeed, several electrophysiological studies in primates including humans have suggested that when the activity of a neuronal population synchronizes at a given frequency, the phase of the induced oscillations ...
We canvas issues in using neural imaging via EEG (electroencephalography) to map human responses to spaces. We describe the technology, some experiments by others relevant to architecture, and two of our own studies. One involves testing EEG as a supplement to user preference studies of urban typologies. The second involves recording the movement and affective (emotional) states of a pedestrian while moving through open spaces in Edinburgh. We produce map overlays of several such walkers as a method of mapping responses to urban spaces.. Click here for the full report. ...
Brain cells communicate via electrical impulses, activity an EEG detects. An abnormal pattern can indicate conditions such as epilepsy.
Brain Activity by Terrance A. Bastian The human brain is a wondrous and complex organic computer that governs every motion of our bodies. Within this computer there is a virtual storm of...
Background Triphasic waves (TWs) are a distinctive but nonspecific electroencephalographic (EEG) pattern originally described in a stuporous patient in 1950 by Foley as
Kindergarten economics: when a person makes $ 1,000 per month and spends $ 1,200, after a while he will have problems. At first, he may find a bank that is willing to lend him the $ 200, but banks are not (totally) crazy so at one point the individual will have to cut his spending and live with the money he actually makes. The US of A as a whole has been living like the person in this example for at least a decade, continuously spending more than it is making. With the recent sub-prime crisis, this period seemed to have come to an end which is good. Americans need to spend less, save more and go back to a standard of living they can actually afford. But the Bush government and the Fed are now doing their best to prolong the good times by giving away tax checks and dramatically lowering interest rates. Which only means that the recession that will follow will be deeper, when it comes. All Bush and the Fed are doing is delaying the process of adjustment. This would have been a good time to force ...
The present work focused on the study of fluctuations of cortical activity across time-scales in young and older healthy adults. The main objective was to offer a comprehensive characterization of the changes of brain (cortical) signals variability during aging and make the link with known underlying structural, neurophysiological and functional modifications, as well as aging theories. We analyzed EEG data of young and elderly adults, which were collected at resting state and during an auditory odd-ball task. We used a wide battery of metrics that typically are separately applied in the literature, and we compared them to more specific ones that address their limits. Our procedure aimed to overcome some of the methodological limitations of earlier studies and verify whether previous findings can be reproduced and extended to different experimental conditions. In both rest and task conditions, our results mainly revealed that EEG signals presented systematic age-related changes that were ...