Effect of illuminance and color temperature on lowering of physiological activity. (1/272)

To investigate how illuminance and color temperature in illumination affect the autonomic nervous system and central nervous system in conditions tending to lower physiological activity, and with an ordinary residential setting in mind, we performed an experiment on 8 healthy male subjects. The experimental conditions consisted of 4 conditions provided by a combination of 2 levels of color temperature (3000 K, 5000 K) and 2 levels of illuminance (30 lx, 150 lx). Physiological measurement was carried out during a process of 22 minutes of light exposure followed by 20 minutes of sleep in darkness. Heart rate variability (HRV) was used as an index of the autonomic nervous system, and alpha attenuation coefficient (AAC) and mean frequency of EEG were used as indices of the central nervous system. Subjective evaluation of drowsiness during the experiment was also carried out immediately following the 20 minutes sleep. No effect on HRV from illumination was noted, but significantly (p < 0.05) lower values for AAC were obtained under 3000 K conditions than 5000 K conditions in measurements during the first half of light exposure (Session 1). During alpha attenuation testing, significantly (p < 0.05) lower values for mean frequency in the theta-beta EEG bandwidth were also obtained under 3000 K conditions than 5000 K conditions, but that pattern persisted in measurement during the second half of light exposure (Session 2). Subjective drowsiness was also higher under 3000 K conditions than 5000 K conditions. These results suggest that low color temperature light creates a smooth lowering of central nervous system activity, and that low color temperature illumination can be used effectively in a bedroom or other such environment where it is desirable to facilitate lowered physiological activity.  (+info)

Effect of wake-sleep transitions and rapid eye movement sleep on pharyngeal muscle response to negative pressure in humans. (2/272)

1. Genioglossus (GG) activation in response to upper airway negative pressure may be an important mechanism in the maintenance of airway patency. This reflex occurs during wakefulness but is diminished during stable non-rapid eye movement (NREM) sleep. Since obstructive events occur more commonly at wake-sleep transitions and during rapid eye movement (REM) sleep than during stable NREM sleep, we assessed the GG reflex during these two vulnerable states. 2. Seventeen healthy adults were studied throughout one evening and overnight. Electroencephalograms (EEGs), electro-oculograms (EOGs), submental electromyogram (EMG), GG EMG (intramuscular electrodes), and choanal plus epiglottic pressures were recorded. The GG reflex response to pulses of -8 cmH2O choanal pressure applied via nose mask during early inspiration was quantified repeatedly during relaxed wakefulness, within five breaths of wake-sleep transition (EEG alpha-theta transition) and during REM sleep. Only trials without EEG arousal were analysed, resulting in data from 14 subjects during sleep onset and 10 subjects during REM sleep (overall, 174-491 trials per state). 3. During wakefulness there was brisk GG reflex activation in response to negative pressure (amplitude: +78.5 +/- 28.3 % baseline (mean +/- s.e.m.); latency to maximal response: 177 +/- 16 ms). 4. At sleep onset, although there was marked variability among individuals, there was no significant reduction in the magnitude of the GG reflex for the group as a whole (amplitude: +33.2 +/- 8.2 % baseline; latency: 159 +/- 15 ms). 5. In contrast, during REM sleep there was a reduction of GG reflex (amplitude: -12.6 +/- 8.3 % baseline (P = 0.017 vs. awake); latency: 160 +/- 10 ms (n.s. vs. awake)) and greater airway collapsibility during the applied pressures (P = 0.043 vs. awake). 6. We conclude that there was no systematic reduction in the GG reflex to negative pressure at sleep onset. Nonetheless, it remains possible that sleep-deprived normal subjects and patients with sleep apnoea could react differently. 7. The apparent inhibition of the GG reflex during REM sleep may help explain why the upper airway is vulnerable to collapse during this state.  (+info)

Investigation of nonlinear ECoG changes during spontaneous sleep state changes and cortical arousal in fetal sheep. (3/272)

We examined the processes of cortical activation and deactivation of the fetal brain during spontaneous sleep state transitions and during central nervous processing of vibroacoustic stimulations (VASs) using nonlinear analysis of the electrocorticogram (ECoG). Tests of nonlinearity and a random shuffling routine revealed deterministic and nonlinear portions in the fetal ECoG. As common nonlinear measures are not applicable to nonstationary time series, we developed an algorithm to estimate the predictability of the ECoG in its time course by means of a point prediction error (PPE). The ECoG was recorded before and during VAS from the maternal abdominal surface in seven chronically instrumented fetal sheep at 0.8 of gestation. The PPE during REM sleep was significantly higher than during NREM sleep. VAS in NREM sleep resulted in an abrupt increase of the PPE not reaching the level of REM sleep. The steep increase of the PPE at onset and its slow decrease after cessation of the stimulus were very similar to the dynamics of spontaneous sleep state transitions, suggesting the involvement of the same cortical activating mechanisms. In conclusion, the stage and the time course of fetal brain activation and deactivation patterns can be clearly shown by PPE techniques. The PPE is a useful complement to spectral analysis. Both techniques describe different properties of the ECoG.  (+info)

Anticipatory biasing of visuospatial attention indexed by retinotopically specific alpha-band electroencephalography increases over occipital cortex. (4/272)

Alpha-band (8-14 Hz) oscillatory EEG activity was examined with high-density scalp electrical recording during the cue-stimulus interval of an endogenous spatial cueing paradigm. In different blocks, cued spatial locations (left or right) were in either the upper or lower visual field, and attended stimuli were either oriented Ts or moving dots. Distractor stimuli were equally likely in the uncued hemifield. Sustained focal increases of alpha-band activity were seen over occipital cortex contralateral to the direction of the to-be-ignored location (ipsilateral to the cued direction of attention) before onset of the to-be-attended stimulus. The focus of alpha-band activity also moved depending on whether cued locations were in the upper or lower field. Results are consistent with active gating of uncued spatial locations.  (+info)

Oscillatory cortical activities in the gamma band in the human EEG induced by visual stimuli--representation of the stimulus? (5/272)

The present work presents three experiments investigating cortical activities in the gamma band in humans. On the basis of theoretical models and animal experiments, synchronized oscillatory neuronal activity is discussed as the key mechanism by which the brain binds information processesed in different cortical areas to form a percept. Using an identical stimulation design--the same as used in animal studies--it was shown that induced gamma band responses in the EEG resemble the same features as those found in the intracortical recordings of animals. In addition, the present work demonstrates that these cortical activities are not higher harmonics of the alpha band and that they are sensitive to the features of the stimulus. These results support the notion that gamma band activity is not just a by-product of neuronal activity and that alpha- and gamma band activities most certainly represent different cortical functional states.  (+info)

Nonlinearity in human resting, eyes-closed EEG: an in-depth case study. (6/272)

The question of nonlinearity in the human electroencephalogram (EEG) is important, since linear methods of EEG analysis are more well-developed and computationally faster than nonlinear methods. Furthermore, the presence or absence of nonlinearity has important theoretical implications for understanding the nature of the brain's oscillatory activity. Using a linear summary measure as a control, we report a failure to reject the null hypothesis of a (largely) stationary linear-Gaussian process for normal, resting, eyes-closed EEG from a single participant. We found significant evidence of nonlinearity at two occipital sites (O1 and O2) where the 8-12.5 Hz alpha rhythm was prominent. However, this element of nonlinear structure appeared trivial, as (1) we found no evidence of time irreversibility at these loci, and (2) best-fitting linear models accounted on-average for over 94% of the variance in the data with nonlinear modeling doing no better. Half of the remaining variance could be accounted for by nonstationarity. While our findings technically apply only to the one individual tested, his EEG was typical of those seen under the conditions that we employed.  (+info)

The role of the thalamic reticular neurons in alpha- and gamma-oscillations in neocortex: a mechanism for selective perception and stimulus binding. (7/272)

The long-term objective is to understand how large masses of neurons in the brain process information during various learning and memory paradigms. Both time- and space-dependent processes have been identified in animals through computer-based analytic quantifications of event-related extracellular potentials. New nonlinear analyses have been introduced that presume that the fine-grain variation in the signal is determined and patterned in phase-space. Some neurons in the primary visual cortex manifest gamma-band oscillations. These cells show both a nonspecific phase-alignment (response synchrony) and a specific tuning (orientation tuning) when stimuli are presented to their receptive fields. This dual regulation of the sensory cells is proposed to underlie stimulus binding, a theoretical mechanism for "object" perception. Nonlinear analytic results from gamma-activities in a simple model neuropil (olfactory bulb) suggest that neuroplasticity may arise through self-organization, a process in which a nonlinear change in the dynamics of the oscillatory field potentials is the hallmark. This self-organization may follow simple dynamical laws in which global cooperativity among the neurons is transiently brought about that, over trials, results in enduring changes in the nonlinear dynamics of some neurons. In conclusion, the sculpturing of the synaptic throughput in the sensory cortex (stimulus binding) may be associated with the irregular phases of the gamma-activities and may result from both specific and nonspecific systems operating together in a nonlinear self-organizing manner.  (+info)

Neurophysiological measures of working memory and individual differences in cognitive ability and cognitive style. (8/272)

The capacity to deliberately control attention in order to hold and manipulate information in working memory is critical to higher cognitive functions. This suggests that between-subject differences in general cognitive ability might be related to observable differences in the activity of brain systems that support working memory and attention control. To test this notion, electroencephalograms were recorded from 80 healthy young adults during spatial working memory tasks. Measures of task-related neurophysiological and behavioral variables were derived from these data and compared to scores on a test battery commonly used to assess general cognitive ability (the WAIS-R). Subjects who scored high on the psychometric test also tended to respond faster in the experimental tasks without any loss of accuracy. The amplitude of the late positive component of the event-related potential was larger in high-ability subjects, and the frontal midline theta component of the EEG signal was also selectively enhanced in this group under conditions of sustained performance and high working memory load. These results suggest that subjects who scored high on the WAIS-R were better able to focus and sustain attention to task performance. Changes in the EEG alpha rhythm in response to manipulations of task practice and load were also examined and compared between frontal and parietal regions. The results indicated that high-ability subjects developed strategies that made relatively greater use of parietal regions, whereas low-ability subjects relied more exclusively on frontal regions. Other analyses indicated that hemispheric asymmetries in alpha band measures distinguish between individuals with relatively high verbal aptitude and those with relatively high nonverbal aptitude. In particular, subjects with a verbal cognitive style tended to make greater use of the left parietal region during task performance, and subjects with a nonverbal style tended to make greater use of the right parietal region. These results help clarify relationships between task-related brain activity and individual differences in cognitive ability and style.  (+info)

*History of neuroimaging

Cohen D (1968). "Magnetoencephalography: evidence of magnetic fields produced by alpha rhythm currents". Science. 161: 784-6. ...

*Magnetoencephalography

The brain's magnetic field, measuring at 10 femtotesla (fT) for cortical activity and 103 fT for the human alpha rhythm, is ... ISBN 9780205239399 pp 152-153 Cohen D. (1968). "Magnetoencephalography: evidence of magnetic fields produced by alpha rhythm ... "Altered temporal correlations in parietal alpha and prefrontal theta oscillations in early-stage Alzheimer disease". PNAS. 106 ...

*Brain connectivity estimators

"Dynamics of the human alpha rhythm: evidence for non-linearity?". Clin Neurophysiol. 110 (10): 1801-1813. doi:10.1016/S1388- ... well with the known phenomena of event related synchronization and desynchronization such as decrease of the activity in alpha ...

*Mind machine

Lynch, J.; Paskewitz, D.; Orne, M. (1974). "Some Factors in the Feedback Control of Human Alpha Rhythm". Psychosomatic Medicine ... It is aimed to reach a level of "slow alpha" (8 Hz). Glickson (1986) states that an alpha frequency of 10 Hz is optimal for ... He assumes that it's the change in alpha activity and not the alpha activity itself that is facilitating an altered state of ... The development of alpha EEG feedback (see neurofeedback) is an important starting point for biofeedback and its explicit use ...

*Audio-visual entrainment

With the development of the EEG, Adrian and Matthews published their results showing that the alpha rhythm could be "driven" ... Toman, J. (1941) Flicker potentials and the alpha rhythm in man. Journal of Neurophysiology, 4, 51-61. Barlow, J. (1960) ... In his view, the rhythms of the lamp interacted with the rhythms of the brain's electrical activity to produce a complex ... Visual entrainment alone, in the alpha frequency range (7-10 Hz), has been shown to easily induce hypnosis, and it has been ...

*Arno Villringer

Journal of Neuroscience 30(35):11670-7 Ritter, P., Moosmann, M., Villringer, A. (2009). Rolandic alpha and beta EEG rhythms' ... Correlates of alpha rhythm in functional magnetic resonance imaging and near infrared spectroscopy. Neuroimage. 20(1):145-58 ... 1996), combined EEG / fMRI to show fMRI correlates of background rhythms (Moosmann et al. 2003, Ritter et al. 2009) and ...

*Daniel N. Robinson

ISBN 1-4411-4851-5. Articles Robinson, Daniel N. (1966). "Visual reaction time and the human alpha rhythm: The effects of ...

*Neural oscillation

Noise-driven harmonic oscillators realistically simulate alpha rhythm in the waking EEG as well as slow waves and spindles in ... dynamical control of alpha rhythms in relation to focal attention". Int J Psychophysiol. 43 (1): 25-40. doi:10.1016/S0167-8760( ... Oscillatory rhythms at 10 Hz have been recorded in a brain area called the inferior olive, which is associated with the ... These ongoing rhythms can change in different ways in response to perceptual input or motor output. Oscillatory activity may ...

*Photostimulation

"Effects of levetiracetam vs topiramate and placebo on visually evoked phase synchronization changes of alpha rhythm in migraine ...

*Catherine Kerr (neuroscientist)

... somatosensory attention and top-down modulation of cortical alpha rhythms in mindfulness meditation". Frontiers in Human ... Kerr, Catherine (2011). "Effects of mindfulness meditation training on anticipatory alpha modulation in primary somatosensory ... Somatosensory attention and cortical alpha modulation in mindfulness meditation" Mindfulness 2014, "Moving beyond mindfulness: ...

*The Twilight of Briareus

Calvin proves to be a "diplodeviant", one of very few people whose zeta and alpha rhythms are in phase. McHarty suggests that ... The people who slept, mostly girls, are becoming known as "Zeta mutants" after a new "zeta" rhythm observable in their ...

*Saccade

Specific pre-target oscillatory (alpha rhythms) and transient activities occurring in posterior-lateral parietal cortex and ...

*Wilson-Cowan model

In waking adults this state is commonly associated with alpha rhythm, whereas slower (theta and delta) rhythms are usually ... alpha (t-t')[c_{1}E(t')-c_{2}I(t')+P(t')]dt'} where α ( t ) {\displaystyle \alpha (t)} is the stimulus decay function, c 1 {\ ... alpha (t-t')[c_{3}E(t')-c_{4}I(t')+Q(t')]dt'\right\}} Time Coarse Graining τ d E ¯ d t = − E ¯ + ( 1 − r E ¯ ) S e [ k c 1 E ... alpha (t-t')[c_{1}E(t')-c_{2}I(t')+P(t')]dt'\right\}} I ( t + τ ) = [ 1 − ∫ t − r t I ( t ′ ) d t ′ ] S i { ∫ − ∞ t α ( t − t ...

*Bolon (musical instrument)

"Alpha Rhythm Roots - Bolon". www.alpharhythmroots.com. Retrieved 2016-09-26. Stone, Ruth M., ed. "West Africa: An Introduction ...

*List of MeSH codes (E01)

... alpha rhythm MeSH E01.370.376.300.125 --- beta rhythm MeSH E01.370.376.300.150 --- cortical synchronization MeSH E01.370. ... alpha rhythm MeSH E01.370.405.245.125 --- beta rhythm MeSH E01.370.405.245.150 --- cortical synchronization MeSH E01.370. ... 405.245.175 --- delta rhythm MeSH E01.370.405.245.700 --- theta rhythm MeSH E01.370.405.250 --- electrokymography MeSH E01.370. ... 376.300.175 --- delta rhythm MeSH E01.370.376.300.700 --- theta rhythm MeSH E01.370.376.500 --- magnetoencephalography MeSH ...

*Itzhak Bentov

This resonant beat is approximately seven cycles per second, which corresponds not only to the alpha rhythm of the brain but ...

*Myoclonic astatic epilepsy

... during therapy and absence of occipital alpha-rhythm with therapy also suggest a poor prognosis (Doose 1992a). Myoclonic- ... Failure to suppress the EEG abnormalities (4- to 7-Hz rhythms and spike-wave discharges) ...

*EEG microstates

In 1999, Cantero, Atienza, Salas, and Gómez studied alpha rhythms in normal human subjects during 3 different drowsy/sleep ... they suggest that the alpha rhythm could be the "natural resonance frequency of the visual cortex during the waking state, ... Cantero, J. L.; Atienza, M.; Salas, R. M.; Gómez, C. M. (1999). "Brain spatial microstates of human spontaneous alpha activity ... It is also noteworthy that schizophrenic-like behavior can be induced by manipulating a normal human's alpha wave frequency. [ ...

*Alpha wave

That's clearly a stretch, but the Jell-O EEG readings do look pretty similar to a normal human alpha rhythm. Alpha waves are ... The first natural rhythm he documented was what would become known as the alpha wave. Berger was very thorough and meticulous ... Niedermeyer E (1997). "Alpha rhythms as physiological and abnormal phenomena". International Journal of Psychophysiology. 26 (1 ... The mature alpha wave, at 10 waves per second, is firmly established by age 3. The second occurrence of alpha wave activity is ...

*Atomic Opera

... on Alpha and Oranges) For Madmen Only (1994) Penguin Dust (1997, Review: Cross Rhythms) Alpha and Oranges (1999, Reviews: The ... Figgis, Alex (June 1999). "Atomic Opera - Alpha & Oranges". Cross Rhythms (51). Bixler, David (July-August 2000). "Reviews: / ... Alpha and Oranges, and Penguin Dust) Jonas Velasco - bass, vocals (on For Madmen Only and Alpha and Oranges) Jonathan Marshall ... While working on new material, Hart compiled the album Alpha and Oranges, a collection of unreleased demos originally from the ...

*Hans Berger

... such as the alpha wave rhythm (7.812-13.28 Hz), also known as "Berger's wave"; and its suppression (substitution by the faster ... and the discoverer of the alpha wave rhythm known as berger wave Berger was born in Neuses (now part of Coburg), Saxe-Coburg ... Using the EEG he was also the first to describe the different waves or rhythms which were present in the normal and abnormal ... beta waves) when the subject opens the eyes (the so-called alpha blockade). He also studied and described for the first time ...

*Convergent thinking

... both convergent and divergent thinking produced significant desynchronization of the Alpha 1,2 rhythms. Meanwhile, convergent ...

*Phi complex

The study demonstrated a clear reduction in occipital lobe alpha wave and mu wave rhythms during social interaction. The ... The phi complex is a brain rhythm in the awake human brain that appears to serve various social functions. Phi is one of ... This new brain rhythm that we have discovered and termed the 'phi complex' actually distinguishes when you're socially ... several brain rhythms in the awake human brain that coordinate human behavior. "Phi" operates in the 10-Hz band (ten ...

*Baldev Singh (neurologist)

With study of Alpha wave, also called Berger's rhythm in memory of Hans Berger, Singh undertook a training in electronics. In ...

*AMPT

"Prolonged inhibition of presynaptic catecholamine synthesis with alpha-methyl-para-tyrosine attenuates the circadian rhythm of ... Alpha-methyl-p-tyrosine (AMPT) is a tyrosine hydroxylase enzyme inhibitor. Alpha-methyl-p-tyrosine (AMPT) is a non-endogenous ... Elimination Small amounts of metabolites (alpha-methyldopa and alpha-methyldopamine) were found after the administration of ... Ankenman, Ralph; Salvatore, Michael F. (2007). "Low Dose Alpha-Methyl-Para-Tyrosine (AMPT) in the Treatment of Dystonia and ...

*Hemoencephalography

... when University of Chicago professor Joseph Kamiya trained a volunteer to recognize and alter alpha brain wave activity. Just ... revolutionary study on cats at the behest of NASA that proved that cats trained to consciously alter their sensorimotor rhythm ... Toomim was founding Toomim Biofeedback Laboratories and Biocomp Research Institute on the basis of a device known as the Alpha ... to humans in 1971 when Sterman trained an epileptic to control her seizures through a combination of sensorimotor rhythm and ...
Dr. Fernando H. Lopes da Silva accepted the invitation on 1 December 2007 (self-imposed deadline: 1 February 2008). This article will briefly cover: Definitions and diversity of alpha rhythms. Neurophysiology of alpha rhythms generators; cellular and network properties. The dynamics of alpha rhythms. Functional correlates of alpha rhythms in relation to behavior and cognitive processes. Clinical implications of alpha rhythms. ...
Conscious visual perception is proposed to arise from the selective synchronization of functionally specialized but widely distributed cortical areas. It has been suggested that different frequency bands index distinct canonical computations. Here, we probed visual perception on a fine-grained temporal scale to study the oscillatory dynam- ics supporting prefrontal-dependent sensory processing. We tested whether a predictive context that was embedded in a rapid visual stream modulated the perception of a subsequent near-threshold target. The rapid stream was presented either rhythmically at 10 Hz, to entrain parietooccipital alpha oscillations, or arrhythmically. We identified a 2- to 4-Hz delta signature that modulated posterior alpha activity and behavior during predictive trials. Importantly, delta-mediated top-down control diminished the behavioral effects of bottom-up alpha entrainment. Simultaneous source-reconstructed EEG and cross-frequency directionality analyses revealed that this ...
... definition, a pattern of slow brain waves (alpha waves) in normal persons at rest with closed eyes, thought by some to be associated with an alert but daydreaming mind. See more.
Studies exploring the role of neural oscillations in cognition have revealed sustained increases in alpha-band power during the delay period of verbal and visual working memory (VWM) tasks. There have been various proposals regarding the functional significance of such increases, including the inhibition of task-irrelevant cortical areas as well as the active retention of information in VWM. The present study examines the role of delay-period alpha-band power in mediating the effects of interference arising from on-going visual processing during a concurrent VWM task. Specifically, we reasoned that, if set-size dependent increases in alpha-band power represent the gating out of on-going task-irrelevant visual inputs, they should be predictive with respect to some modulation in visual evoked potentials resulting from a task-irrelevant delay period probe stimulus. In order to investigate this possibility, we recorded the electroencephalogram while subjects performed a change detection task requiring the
In the normal awake adult (with eyes closed), alpha rhythm predominates in the posterior part of the head. The amplitude of the alpha waves falls off anteriorly, and it is often replaced by low-voltage beta activity. Often, some low-voltage theta activity can be seen in frontocentral or temporal regions. The alpha rhythm, which is prominent posteriorly, disappears (or is blocked) when the eyes open. This reactivity to eye opening/closure is an important aspect of a normal EEG, and is often attenuated with many pathologies.. When a normal adult becomes drowsy, the alpha rhythm gradually disappears, frontocentral beta activity may become more prominent, and frontocentrotemporal theta activity becomes predominant. Drowsiness is stage I sleep. As sleep becomes deeper, high-voltage single or complex theta or delta waves, called vertex sharp waves, appear centrally. Stage II sleep is characterized by increased numbers of vertex sharp waves, and runs of sinusoidal 12- to 14-Hz beta activity, called ...
Atrophy of hippocampus and alteration of resting eyes-closed electroencephalographic (EEG) rhythms represent important features of mild cognitive impairment (MCI) and Alzheimers disease (AD). Here we evaluated linear and non-linear aspects of the relationship between these features in the continuum along MCI and AD conditions, as a reflection of neurodegenerative processes. Eyes-closed resting EEG data were recorded in 60 healthy elderly (Nold), 88MCI, and 35 Alzheimers disease (AD) patients. Hippocampal volumewasmeasured in magnetic resonance imaging of the MCI and AD subjects. Based on the normalized hippocampal volume, selected MCI subjects could be divided into two demographically paired sub-groups: those with larger hippocampal volume (MCI +h; N=40; mini mental state evaluation - MMSE - score=27.5±0.26 SE) and those with smaller hippocampal volume (MCI −h; N=40; h; MMSE=26.5±0.34 SE); the normalized hippocampal volume was statistically greater in the MCI +h than in the MCI −h and AD ...
Define alpha alpha wave. alpha alpha wave synonyms, alpha alpha wave pronunciation, alpha alpha wave translation, English dictionary definition of alpha alpha wave. n. 1. The first letter of the Greek alphabet. See Table at alphabet. 2. The first of a series; the beginning. 3. Astronomy The brightest star in a...
When people identify an object, they have to match what they sense against their knowledge. In general, people accomplish recognition by a combination of two information processing pathways: top-down and bottom-up. Bottom-up processing (i.e. sensation) occurs when the sensory input information induces perceptual representation, whereas top-down processing (i.e. identification) occurs when the perceptual representation is influenced by some higher mental function such as previous knowledge, motivation, or expectation.. To facilitate perceptual identification, one may use subjective expectations of the stimulus to come. Accordingly, a cognitive intention (e.g. expectation, mental readiness, active redirection of attention), embedded in a top-down process, may precede an event or stimulus. Bottom-up sensory processing is then guided by such top-down processing as a specific reallocation of attention relevant to the type of stimulus to follow or task to be performed. In this way, top-down ...
Hypnotizability is a cognitive multidimensional trait that involves peculiar imagery characteristics. Subjects with high- (Highs) and low (Lows)-susceptibilities to hypnosis have shown different levels of skill at visual and somesthetic-guided imageries performed during upright stance. The aim of this experiment is to study the modulation of the EEG alpha and theta band amplitude during guided visual and somesthetic imageries in Highs and Lows, as these rhythms are responsive to the cognitive activities involved in mental imagery. Our results show that, at variance with standing subjects, subjects in both groups in a semi-reclined position report higher vividness and lower effort for visual than for somesthetic imagery. EEG patterns however are different between the two groups. Highs exhibit a more widespread alpha desynchronization and slightly different EEG patterns during visual and somesthetic imageries, while Lows show segregated alpha- and theta-desynchronization, without any difference between
This paper presents a new approach to investigate the spatial correlation of brain alpha activity in functional magnetic resonance imaging (fMRI) and electroencephalography (EEG). To avoid potential problems of simultaneous fMRI and EEG acquisitions in imaging brain alpha activity, data from each modality were acquired separately under a "three conditions" setup where one of the conditions involved closing eyes and relaxing, thus making it conducive to generation of alpha activity. The other two conditions -- eyes open in a lighted room or engaged in a mental arithmetic task, were designed to attenuate alpha activity. Using the Mixture Density Independent Component Analysis (MD-ICA) that incorporates flexible non-linearity functions into the conventional ICA framework, we could identify the spatiotemporal components of fMRI activations and EEG activities associated with the alpha rhythm. The sources of the individual EEG alpha activity component were localized by a Maximum Entropy (ME) method ...
Pictures are powerful tools for illustrating quantitative data and capturing public interest. Each year, NASA releases many beautiful images of Martian dunes and distant nebulae which help win public funding. Likewise, when it comes to grabbing headlines and commanding public attention, noninvasive studies of functional brain activity often do best when they beautifully illustrate said activity as colorful pixels dancing on the convoluted surface of the cerebral cortex.Continue reading. ...
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The article deals with the study of bioelectric activity of the brain in patients with various forms of migraine, complicated by status migrainosus. The EEG-mapping was performed for 32 patients with diff erent forms of migraine. The EEG registration was carried out between the attacks. Patients were calm and active and performed functional tests. The following frequency ranges were analyzed: delta rhythm, theta rhythm, alpha rhythm, beta rhythm. The spectral powers of the rhythms in the frontal, parietal, temporal, occipital regions of the cerebral hemispheres were evaluated. The results of EEG-mapping showed that patients with diff erent forms of migraine demonstrated a decrease in reactivity of the cerebral cortex as per fast-wave indices, which was even more prominent in a group of patients with migraine without aura, as well as the activation of slow-wave activity in these patients. Analysis of the data of cartograms shows that activation of slow-wave ranges and alpha frequency inhibition ...
Temporal expectations have been shown to enhance visual analysis of task-relevant events, especially when these are coupled with spatial expectations. Oscillatory brain activity, particularly in the alpha band, has been implicated in regulating excitability in visual areas as a function of anticipatory spatial attention. Here we asked whether temporal expectations derived from regular, rhythmic events can modulate ongoing oscillatory alpha-band activity, so that the changes in cortical excitability are focused over the time intervals at which target events are expected. The task we used involved making a perceptual discrimination about a small target stimulus that reappeared from behind a peripheral occluding band. Temporal expectations were manipulated by the regular, rhythmic versus irregular, arrhythmic approach of the stimulus toward the occluding band. Alpha-band activity was measured during the occlusion period, in which no stimulus was presented, but target reappearance was anticipated in
It has been suggested recently that the influence of the neuro-magnetic field should make electrical brain activity directly detectable by MRI. To test this hypothesis, we performed combined EEG-MRI experiments which aim to localize the neuronal current sources of alpha waves (8-12 Hz), one of the most prominent EEG phenomena in humans. A detailed analysis of cross-spectral coherence between simultaneously recorded EEG and MRI time series revealed no sign of alpha waves. Instead the EEG-MRI approach was found to be hampered by artefacts due to cardiac pulsation, which extend into the frequency band of alpha waves. Separate brain displacement mapping experiments confirmed that not only the EEG but also the MRI signal is confounded by harmonics of the cardiac frequency even at 10 Hz and beyond. This well-known ballistocardiogram artefact cannot be avoided or eliminated entirely by available signal processing techniques. Therefore we must conclude that current EEG-MRI methodology based on ...
Time is an inseparable component of every physical event that we perceive, yet it is not clear how the brain processes time or how the neuronal representation of time affects our perception of events. Here, we asked subjects to perform a visual discrimination task, while we changed the temporal context in which the stimuli were presented. We collected electroencephalography (EEG) signals in two temporal contexts. Predictable blocks: stimuli were presented after a constant delay relative to a visual cue, and unpredictable blocks: stimuli were presented after variable delays relative to the visual cue. Four sub-second delays of 83, 150, 400 and 800 ms were used in the predictable and unpredictable blocks. We observed that predictability modulated the power of prestimulus alpha oscillations in the parieto-occipital sites and this modulation only occurred in the longest delay period, 800 ms, in which the predictability also improved the behavioral performance of the subjects. Moreover, learning the ...
In a recent study (Long-term stability in childrens frontal EEG alpha asymmetry between 14-months and 83-months, we measured resting state alpha EEG in children at two measurement points.
The relationship between the electro-encephalographic (EEG) alpha and beta oscillations in the resting condition was investigated in the study. EEGs were recorded in 33 subjects, and alpha (7.5-12.5Hz) and beta (15-25Hz) oscillations were extracted with the use of a modified wavelet transform. Power, peak frequency and phase synchronisation were evaluated for both types of oscillation. The average beta-alpha peak frequency ratio was about 1.9-2.0 for all electrode derivations. The peak frequency of beta activity was within 70-90 % of the 95 % confidence interval of twice the alpha frequency. A significant (p , 0.05) linear regression was found between beta and alpha power in all derivations in 32 subjects, with the slope of the regression line being approximate to 0.3. There was no significant difference in the slope of the line in different electrode locations, although the power correlation was strongest in the occipital locations where alpha and beta oscillations had the largest power. A ...
Mary Brazier (1961) has described the work of the German psychiatrist Hans Berger as the triumph of a man working with equipment that was inadequate even by the standards of his day. Like Caton, Berger attempted to record electrical responses to sensory stimuli in animals, although it seems that the work he did between 1902 and 1910 was in general unsuccessful. In 1924 he turned to the measurement of human electrical potentials but delayed publication of his results until 1929, when the first recorded electroencephalogram (of his young son) appeared in Archiv forschung Psychiatrie.. Berger discovered alpha rhythm, running at 10 cycles per second (hertz or Hz). He found that this disappeared if the eyes were opened, with mental effort such as doing mental arithmetic (with the eyes closed) and with loud noises or painful stimuli. Bergers work was disregarded by physiologists partly ecause it was published in psychiatric journals, and perhaps because of his reputation for eccentricity, ...
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Celestial Chronicles is a music studio album recording by ALPHA WAVE MOVEMENT (Progressive Electronic/Progressive Rock) released in 2014 on cd, lp / vinyl and/or cassette. This page includes Celestial Chronicless : cover picture, songs / tracks list, members/musicians and line-up, different releases details, free MP3 download (stream), buy online links: ebay and amazon, ratings and detailled reviews by our experts, collaborators and members.
Kinetic is a music studio album recording by ALPHA WAVE MOVEMENT (Progressive Electronic/Progressive Rock) released in 2016 on cd, lp / vinyl and/or cassette. This page includes Kinetics : cover picture, songs / tracks list, members/musicians and line-up, different releases details, free MP3 download (stream), buy online links: ebay and amazon, ratings and detailled reviews by our experts, collaborators and members.
The over-arching hypothesis that drives my work is that neural dynamics, fluctuating on millisecond to second time scales, powerfully impact perception. In this thesis, I employ correlative electrophysiological recording methods and causal optogenetic control of neural circuits to systematically test the importance of dynamics in the expression of pre-stimulus oscillations on perception. Specifically, I test the prediction that alpha oscillations expressed in a given sensory representation within a neocortical map predict diminished sensory capability in that region of sensory space, while gamma oscillations predict enhanced capacity. My model system throughout is primary somatosensory neocortex and tactile perception: I combine studies from human and mouse to benefit from the relative merits of each preparation. Several prior studies support this more generally stated view of oscillatory dynamics -- alpha predicting diminished and gamma predicting enhanced perceptual capacity. However, there is ...
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(Medical Xpress) -- It has long been suspected that humans do not experience the world continuously, but rather in rapid snapshots.
If you examine the rise of a typical leader, the ability to look and listen decreases as power increases. Thats a trend you need to be aware of. At the outset, a future leader often rises out of a | this curious life
Enjoyed on 7/19/2011 Brewery: Boneyard Beer Location: Bend, OR Beer: Armored Fist Web: http://www.boneyardbeer.com/ Presentation: 64oz Growler Vintage: 2011 Style: Northwest Style Cascadian Dark Ale Barrel: N/A ABV: 10.0% IBU: 80 Hops: N/A Malt: N/A Commercial Description: Imperial Cascadian is the NW style of this brew. This is a very well balanced, extremely hoppy black […] … ...
The present magnetoencephalography (MEG) study tested the hypothesis of a phase synchronization (functional coupling) of cortical alpha rhythms (about 6-12 Hz) within a speech cortical neural network comprising bilateral primary auditory cortex and Wernickes areas, during dichotic listening (DL) of consonant-vowel (CV) syllables. Dichotic stimulation was done with the CV-syllable pairs /da/-/ba/ (true DL, yielded by stimuli having high spectral overlap) and /da/-/ka/ (sham DL, obtained with stimuli having poor spectral overlap). Whole-head MEG activity (165 sensors) was recorded from 10 healthy right-handed non-musicians showing right ear advantage in a speech DL task. Functional coupling of alpha rhythms was defined as the spectral coherence at the following bands: alpha I (about 6-8 Hz), alpha 2 (about 8-10 Hz), and alpha 3 (about 10-12) with respect to the peak of individual alpha frequency. Results showed an inverse pattern of functional coupling: during DL of speech sounds, spectral ...
Looking for online definition of alpha wave in the Medical Dictionary? alpha wave explanation free. What is alpha wave? Meaning of alpha wave medical term. What does alpha wave mean?
Background:: The neural mechanisms of anesthetic vapors have not been studied in depth. However, modeling and experimental studies on the intravenous anesthetic propofol indicate that potentiation of γ-aminobutyric acid receptors leads to a state of thalamocortical synchrony, observed as coherent frontal alpha oscillations, associated with unconsciousness. Sevoflurane, an ether derivative, also potentiates γ-aminobutyric acid receptors. However, in humans, sevoflurane-induced coherent frontal alpha oscillations have not been well detailed. Methods:: To study the electroencephalogram dynamics induced by sevoflurane, the authors identified age- and sex-matched patients in which sevoflurane (n = 30) or propofol (n = 30) was used as the sole agent for maintenance of general anesthesia during routine surgery. The authors compared the electroencephalogram signatures of sevoflurane with that of propofol using time-varying spectral and coherence methods. Results:: Sevoflurane general anesthesia is ...
Recent studies have investigated local oscillations, long-range connectivity, and global network patterns to identify neural changes associated with anesthetic-induced unconsciousness. These studies typically employ anesthetic protocols that either just cross the threshold of unconsciousness, or induce deep unconsciousness for a brief period of time-neither of which models general anesthesia for major surgery. To study neural patterns of unconsciousness and recovery in a clinically-relevant context, we used a realistic anesthetic regimen to induce and maintain unconsciousness in 8 healthy participants for three hours. High-density electroencephalogram (EEG) was acquired throughout and for another three hours after emergence. Seven epochs of 5-minute eyes-closed resting states were extracted from the data at baseline as well as 30, 60, 90, 120, 150 and 180 minutes post-emergence. Additionally, 5-minute epochs were extracted during induction, unconsciousness and immediately prior to recovery of
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Weve provided the first evidence that specifically enhancing alpha oscillations is a causal trigger of a specific and complex behavior, in this case, creativity.
The waking EEG is thought to be one of the most heritable physiologic signals, based on numerous studies in monozygotic and dizygotic twin pairs (Stassen et al. 1987; van Beijsterveldt et al. 1996). Moreover, between‐subject differences in spectral power are stable across weeks or months, assessed across the major EEG frequency bands (Gasser et al. 1985; Pollock et al. 1991; Salinsky et al. 1991). In particular, strong individual differences in EEG alpha activity are observed when assessed in rested participants who have their eyes closed. Here, we demonstrate that between‐subject differences in delta, theta, alpha, and beta activity are reproducible across repeated exposures to sleep deprivation, assessed when participants were taking the PVT. After adjusting for individual differences at baseline, however, only EEG alpha power exhibited significant individual differences in response to sleep deprivation. These findings are consistent with a previous study in which the most reproducible EEG ...
The evidence for other neurobehavioural effects in volunteer studies, such as the effects on brain electrical activity, cognition, sleep, hypersensitivity and mood, is less clear. Generally, such studies have been carried out at exposure levels below those required to induce the effects described above, and have produced evidence only of subtle and transitory effects at best. The conditions necessary to elicit such responses are not well-defined at present.. Despite some scattered field-dependent changes, most notably in the alpha frequency band, and with intermittent exposure perhaps more effective than continuous exposure, these studies have produced inconsistent and sometimes contradictory results.. Generally, while electrophysiological considerations suggest that the central nervous system is potentially susceptible to induced electric fields; cognitive studies have not revealed any clear, unambiguous finding.. There is some evidence suggesting the existence of field-dependent effects on ...
The above is a representation of the electrical activity of the brain by frequency after 20 minutes of use of Alpha-Stim CES at 0.5 Hz. The EEG of 30 research volunteers was averaged and analyzed by computer to generate the average of brain changes in brain activity after 20 minutes of Alpha-Stim. This is a difference brain map, where a decrease in activity after the use of Alpha-Stim is shown in shades of blue and an increase in activity is seen in shades of yellow and red (green indicates no change). The above map shows that there is a decrease in delta, the 1, 2, and 3 Hz frequencies associated in waking individuals with impaired cognitive functioning. Significant increases are seen in alpha frequencies with peak activity at 9 Hz. Increases were also seen in activity at 12, 13 and 14 Hz, with 13 and 14 Hz activity centering on C3. It is common practice in EEG biofeedback (Neurotherapy) to train increases of 13-15 Hz activity (SMR) at C3 to create increased relaxation and treat epilepsy, ADHD, ...
Persons consuming alcohol before sleep are found to have sleep disturbances later, found in a study, increasing the SWS-related delta power and frontal alpha power.
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مقاله ISI انگلیسی شماره 77710 - ترجمه نشده - موضوع : واقعیت مجازی - 7 صفحه - سال انتشار : 2015 - منبع : الزویر ساینس دایرکت
Neuroscientific studies indicate that increased EEG alpha power is sensitive to sensory inhibition or internal processing demands. This allows us to study whether variations in EEG alpha power are related to the state of mind that is supportive for spontaneous creativity. In particular, we will investigate, following preliminary evidence from Pearce et al. (2010a), whether EEG alpha power variations can be related to measures assumed to be involved in creativity (recognition-h, prediction-h and prediction-H).. ...
TY - JOUR. T1 - Genome-wide association analysis links multiple psychiatric liability genes to oscillatory brain activity. AU - Smit, Dirk J.A.. AU - Wright, Margaret J.. AU - Meyers, Jacquelyn L.. AU - Martin, Nicholas G.. AU - Ho, Yvonne Y.W.. AU - Malone, Stephen M.. AU - Zhang, Jian. AU - Burwell, Scott J.. AU - Chorlian, David B.. AU - de Geus, Eco J.C.. AU - Denys, Damiaan. AU - Hansell, Narelle K.. AU - Hottenga, Jouke Jan. AU - McGue, Matt. AU - van Beijsterveldt, Catharina E.M.. AU - Jahanshad, Neda. AU - Thompson, Paul M.. AU - Whelan, Christopher D.. AU - Medland, Sarah E.. AU - Porjesz, Bernice. AU - Lacono, William G.. AU - Boomsma, Dorret I.. N1 - © 2018 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.. PY - 2018/11. Y1 - 2018/11. N2 - Oscillatory activity is crucial for information processing in the brain, and has a long history as a biomarker for psychopathology. Variation in oscillatory activity is highly heritable, but current understanding of specific ...
Neural Plasticity is a peer-reviewed, Open Access journal that publishes articles related to all aspects of neural plasticity, with special emphasis on its functional significance as reflected in behavior and in psychopathology. Neural Plasticity publishes research and review articles from the entire range of relevant disciplines, including basic neuroscience, behavioral neuroscience, cognitive neuroscience, biological psychology, and biological psychiatry.
Results from research by Dr. Victor Rosenfeld published in the Journal of Clinical Neurophysiology give interesting insights into sleep irregularities in people with fibromyalgia. He found that 45% of the FM group had obstructive sleep apnea, and significant differences were present in the qEEG ratio of delta to alpha frequency power, which was 95% specific for fibromyalgia.
Shifts of covert visual attention induce changes in alpha power over posterior electrode sites. Initial analyses revealed that an early desynchronization was of little discriminative value regarding the direction of attention shifts. We believe that this early desynchronization may be related to the preparation of covert attention shifts. A subsequent synchronization, however, yielded distinctive topographic patterns for the different directions and served as a basis for classification.. Using regularized logistic regression, significant binary classification performance was obtained for each participant, with a mean accuracy of 73.65% for the best pair of directions. A classification accuracy of 70% was proposed as performance threshold above which BCI performance can be considered as robust [32, 33]. In the present study, six participants had a peak performance above 70%, and two participants had a performance that was slightly lower (66% and 69%). Interestingly, this figure is close to the ...
Essential oils stimulates the powerful sense of smell. It is known that odors we smell have a significant impact on how we feel. Studies with brain wave frequency has shown that smelling lavender increases alpha waves in the back of the head, which are associated with relaxation. Fragrance of Jasmine increases beta waves in the front of the head, which are associated with a more alert state.
Listen to Alpha Wave Movement & Jim Cole Radio free online. Listen to free internet radio, sports, music, news, podcasts, talk, and audiobooks. Stream live events, live play-by-play NFL, MLB, NBA, NHL, college football, NCAA basketball, and Premier League matches. CNN, MSNBC, Fox News, ESPN, BBC, NPR.
The aim of this study was to investigate changes in task-related brain oscillations and corticocortical connections in patients with mild cognitive impairment (MCI) and those with normal aging using cross-mutual information (CMI) analysis. We hypothesized that task-related brain oscillations and corticocortical connections were affected by age- and disease-related changes, which could be reflected in the CMI analysis. Electroencephalogram (EEG) recordings were measured in 16 MCI patients, 15 healthy age-matched controls, and 16 healthy younger individuals. The frequencies and interhemispheric CMI data were estimated in all groups. The specific EEG rhythms measured were delta (δ), theta (θ), alpha (α), beta (β), and gamma (γ) bands. Significant differences in δ, θ, α, and β bands were observed between the younger and elderly groups. However, only the θ band was significantly different between the elderly and MCI groups. Moreover, this study used EEG recordings to investigate age- and ...
Background: Postoperative delirium may manifest in the immediate post-anaesthesia care period. Such episodes appear to be predictive of further episodes of inpatient delirium and associated adverse outcomes. Frontal electroencephalogram (EEG) findings of suppression patterns and low proprietary index values have been associated with postoperative delirium and poor outcomes. However, the efficacy of titrating anaesthesia to proprietary index targets for preventing delirium remains contentious. We aim to assess the efficacy of two strategies which we hypothesise could prevent post-anaesthesia care unit (PACU) delirium by maximising the alpha oscillation observed in frontal EEG channels during the maintenance and emergence phases of anaesthesia. Methods: This is a 2 × 2 factorial, double-blind, stratified, randomised control trial of 600 patients. Eligible patients are those aged 60 years or over who are undergoing non-cardiac, non-intracranial, volatile-based anaesthesia of expected duration of ...
Study Music Alpha Waves: Relaxing Studying Music, Brain Power, Focus Concentration Music, is ideal background music to help you concentrate, focus and work more effectively. This instrumental music uses alpha waves and binaural beats to boost concentration and brain power, and is the ideal relaxing music for stress relief. This soothing music can help you study for exams and focus at work.. ...
Study Music Alpha Waves: Relaxing Studying Music, Brain Power, Focus Concentration Music, is ideal background music to help you concentrate, focus and work more effectively. This instrumental music uses alpha waves and binaural beats to boost concentration and brain power, and is the ideal relaxing music for stress relief. This soothing music can help you study for exams and focus at work.. ...
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 ...
Stress and anxiety can cause your brain to malfunction, and that is what yoga can help avert. Here are the 7 effective asanas in yoga for brain power increase. Have a look
comment by sdr · 2018-01-04T05:38:48.595Z · score: 17 (6 votes) · LW · GW. Hello my values a decade ago, its so nice to see you publicly documented! In retrospect & in particular, the level of paranoia imbued here will serve you well against incentive hijacking, and will serve as a foundational stone in goal stability.. There is one particular policy here, where my thinking has changed significantly since then; and Id love to check against Time whether it makes sense, or has my values been shifted:. , Reject invest-y power. Some kinds of power increase your freedom. Some other kinds require an ongoing investment of your time and energy, and explode if you fail to provide it. The second kind binds you, and ultimately forces you to give up your values. The second kind is also easier, and youll be tempted all the time.. Contrast with:. , Optimization never stops. Avoid one-time effort if at all possible. Aim for long-term stability of the process that generates improvements. There is no room ...
Electroencephalogram (EEG) refers to the recording of electrical signals for detecting the abnormalities related to electrical activity of the brain. Elect
electroencephalography (eeg) is an electrophysiological monitoring technique to record electrical activity of the brain. it is generally noninvasive, with...
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Electron microscopy of the skin biopsy showed proliferation of vascular smooth-muscle cells, crenation of the internal elastic lamina and fragmentation of elastic fibres. The basement membrane was irregular and osmiophilic granules were observed.. Neurophysiological examination showed normal visual, auditory and somatosensory evoked potentials, while the EEG revealed a single focal burst of sharp transients left mid-temporally; the alpha rhythm showed lower voltage on the left side.. Case 5. A 67-year-old white woman presented with memory problems and behavioural disturbances. The short-term memory loss had commenced 3 years previously; the behavioural disturbances were more recent, involving paranoid delusions, inappropriate behaviour and an obsession with sweets and diet pills. Episodes of confusion and a gait disturbance involving stiffness of the right leg had been noticed. Previously, the patient had suffered from migraine and had been treated for depression. She did not smoke. At least 2 ...
Electron microscopy of the skin biopsy showed proliferation of vascular smooth-muscle cells, crenation of the internal elastic lamina and fragmentation of elastic fibres. The basement membrane was irregular and osmiophilic granules were observed.. Neurophysiological examination showed normal visual, auditory and somatosensory evoked potentials, while the EEG revealed a single focal burst of sharp transients left mid-temporally; the alpha rhythm showed lower voltage on the left side.. Case 5. A 67-year-old white woman presented with memory problems and behavioural disturbances. The short-term memory loss had commenced 3 years previously; the behavioural disturbances were more recent, involving paranoid delusions, inappropriate behaviour and an obsession with sweets and diet pills. Episodes of confusion and a gait disturbance involving stiffness of the right leg had been noticed. Previously, the patient had suffered from migraine and had been treated for depression. She did not smoke. At least 2 ...
The Brain & Cognition lab has been investigating the interplay between attentional prioritization and working memory for several years. In two recently funded projects by the British Academy and the Royal Society to Nahid Zokaei (British Academy Post-doctoral Fellowship) and Freek van Ede (Newton International Fellowship), we will be further investigating how information in working memory can be dynamically prioritized and what neural mechanisms prior to encoding and during working-memory maintenance contribute to this. This builds on recent research in the lab demonstrating that cues presented during working memory maintenance can dynamically prioritize items in working memory (Wallis et al., 2015) and that ongoing brain states (alpha oscillations) can influence the precision of subsequent working memory representations (Myers et al., 2014).. Experimental Approach. This research programme makes use of behavioural psychophysical experiments as well as state-of-the-art neuroimaging methodologies ...
Arns, M, de Ridder, S, Strehl, U, Breteler, M, & Coenen, A. (2009). Efficacy of neurofeedback treatment in ADHD: The effects on inattention, impulsivity and hyperactivity: A meta-analysis. Clinical EEG and Neuroscience, 40(3) 180-189.. Baehr, E., Rosenfeld, J. P., & Baehr, R. (2001). Clinical use of an alpha asymmetry neurofeedback protocol in the treatment of mood disorders: Follow-up study one to five years post therapy. Journal of Neurotherapy, 4(4), 11-18. Boynton, T. (2001). Applied research using alpha/theta training for enhancing creativity and well-being. Journal of Neurotherapy, 5(1-2), 5-18. Cunningham, M., & Murphy, P. (1981). The effects of bilateral EEG biofeedback on verbal, visuospatial and creative skills in LD male adolescents. Journal of Learning Disabilities, 14(4), 204-208.. Fritson, K. K., Wadkins, T. A., Gerdes, P., & Hof, D. (2007). The impact of neurotherapy on college students cognitive abilities and emotions. Journal of Neurotherapy, 11(4), 1-9.. Gruzelier, J., Egner, ...
KORE Power provides an update about the manufacturing, assembly, testing and development process for its Mark 1 Energy Storage System in advance of expected production in Q1 2020 and confirms that the Company is on target to produce over 5,000 cells/10 Mark 1 Energy Storage System racks, per day.
Want to learn more about Neurofeedback? We have lots of informative links, here! Learn about how Neurofeedback may be of help for specific conditions, download our brochure, or read an article weve written.
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Background Triphasic waves (TWs) are a distinctive but nonspecific electroencephalographic (EEG) pattern originally described in a stuporous patient in 1950 by Foley as
Training time is rapid: After the initial session, self-administered training sessions take 20 to 30 minutes 2 to 3 times per week. Significant improvements in concentration and reduced stress are normally seen in less than 5 sessions ...
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
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We examined whether prestimulus activity that benefits memory encoding is under voluntary control. Three main findings emerged. First, electrical brain activity elicited by a cue presented before a word predicted later memory of the word but only when the cue indicated a high monetary reward for remembering the word. This encoding-related activity started shortly after cue onset and persisted until the word appeared. Second, encoding-related activity was most pronounced before words that were later recollected. Third, encoding-related activity differed, at least in part, from reward-related activity.. These findings provide strong evidence that some anticipatory processes that benefit encoding are under voluntary control. The observation that prestimulus activity affects encoding in a high-reward, but not low-reward, condition implies that individuals are in command of the use of such activity. High- and low-reward trials were randomly intermixed. If prestimulus influences on encoding are the ...
It doesnt matter if its a work project or a relationship. Whatever you dont have an answer to lies down there in theta neurofeedback range. I, myself, have done thousands of neurofeedback sessions and taught many more thousands of people in large groups. Everyone can meditate independently and through neurofeedback in DC. Everyone can get their answers, and everyone, especially . . . I see this when people are hooked up to the Mind Mirror neurofeedback system, over either a weekend or five-day training session. They make the most extraordinary advances in consciousness through neurofeedback training. You end a neurofeedback meditation with certain brainwave pattern. You start the next meditation the next day with the same brainwave pattern, because what this is about is conditioning. You are taking your brain to the place where it is able to have an optimal awareness and optimal functioning through neurofeedback. The brain says, "Oh. Well, this is where I was when I was a child, or this is ...
As you know, the state of ones mind may be measured by the state of their brainwaves. Higher-frequency beta waves indicate wakeful alertness, lower alpha waves indicate daydreaming and relaxation, and even lower delta waves indicate deep sleep. Now, knowing this, what happens if you can employ a simple concept in physics called entrainment. Entrainment means that things naturally fall into rhythm with each other -- for example, if you put two grandfather clocks up against the same wall, it wont be long before their pendulums become synchronized. Well, it turns out that if you beam certain frequencies at the brain, the brain will tend to fall into rhythm with these frequencies. So, theoretically, you could make that person sleepy, dreamy, alert or else put them in a state of nervous agitation by beaming the frequencies corresponding to delta, alpha, beta or high beta frequencies ...
The minerals Potassium, Calcium, Sodium, and Manganese can all help to decalcify the Pineal gland. Essentials oils can also be used to help decalcify the gland, but the most effective way to help decalcify the Pineal Gland is to simply listen to Binaural brain entrainment, which can either be heard in Alpha waves, Beta waves, or Theta waves(Theta being the most effective of the three) and what these sound frequencies do is synchronize both hemispheres of the brain, opening up new neuropathways between the left and right hemispheres. The most important thing that Binaurals do is decalcify the pineal gland which will enhance and heighten spiritual awareness. Carrier tones used in these binaural recordings also influence consciousness and can activate different chakras in your body, especially the Crown chakra. Here take a look this> Pineal Stimulation Brainwaves and then tell me it is all hogwash, and dont say they are just trying to make ...
I also checked on the email that Lipton sent me and I just had to chuckle because the subject of the email was "Coping with stress in the work place: Get in the Zone with Lipton Hot Tea". If I read through that email, I wouldve saved myself a lot of time agonizing over pushing myself to focus. Why? Because Lipton Hot Tea has Theanine in it and its supposed to "induce a state of relaxation, Theanine in tea decreases cluttering of the mind. Studies have shown that Theanine, which is an amino acid, produces a stimulating effect on the brains alpha waves thus improving the persons mental ability. This amino acid is related to glutamine, which, among its other functions, serves as an alternative fuel to the brain. Theanine can also cross the blood-brain barrier, and because it can enter the brain, this amino acid has psychoactive properties ...
All images, information, concepts, and examples are property of Brainmaster Technologies, Inc. and are not to be duplicated or transferred with out expressed written permission of BrainMaster Technologies, Inc. Atlantis I, MicroTesla, BrainAvatar are all trademarks of BrainMaster Technologies. Equipment sold only under the supervision of a licensed practitioner only to be used within scope of practice for relaxation purposes using Alpha waves. Registered as MicroTesla Therapeutic Magnetic Stimulator for pain control. Patent pending on BrainAvatar and Live Z-Score software. All Brainmaster equipment meets IEC-60601, ISO, AAMI, FDA, and CE standards.. ...
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EEG Neurofeedback, also known as biofeedback, has been used for over 25 years. Many parents have reported positive results and there have been some published studies showing encouraging results.
This article provides an overview of the role of neurofeedback as an intervention to target symptoms associated with psychiatric disorders. 2
Common questions about neurofeedback and neurointegration, and how it can help with conditions like Fybromyalgia, Depression, Anxiety, ADD, Dyslexia, addiction
EEG biofeedback trains the brain to function better. Learn what is EEGbiofeedback, what a session is like, issues it helps, find a provider, FAQs & more.
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
There are 33 designs in the FocusedAlert Design package which is part of the Peak Achievement Trainer. The Peak BrainHappiness Trainer, the Deluxe edition, includes these and 31 more ...
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It is possible that the ADHD behaviour improves with the neurofeedback, in particular for patients who are in the active group. This is what was found in the previous study. However, it cannot be guaranteed that patients get better as this is a research study and there is no guarantee that every child gets better with the neurofeedback treatment. Previous studies have shown that some children improve a lot after neurofeedback and other children do not improve that much. Given that we have two types of neurofeedback training, the active group who receive the optimal neurofeedback and the other group that receive sham (i.e. dummy) neurofeedback (not real neurofeedback, but like a placebo), it is expected that patients only get better if they are in the group of children who do the active neurofeedback. If they are in the group of children who do the sham neurofeedback, only small changes are expected, which they may not notice. Participation in the study will help develop better treatment in the ...
The gas-fired combined-cycle power facility is an independent power producer (IPP) that supplies power to a subsidiary of Consolidated Edison, under a power purchase agreement (PPA) through May 2016. After the term of the PPA, the project plans to sell electricity to the New York electricity market ...
FUNCTIONS: Pedometer, Distance, Calories Burned Measuring, Sleep Monitor, SMS Reminding, Call Reminder, SMS Content Shows, Incoming Call ID Show, APP Message Reminder (Like Facebook, Twitter, etc), Camera Remote Control, Sedentary Reminder, Find Your Phone, Anti-lost, Sports target remind ...
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 ...
Serotonin Boost stimulates serotonin production in the brain using a combination of alpha waves and specially tuned meditation music.
By Myrna Martin, MN, RCC, RCST® A: Neurofeedback is a specific type of biofeedback procedure directed toward the renormalization of the brain and central nervous system. It utilizes the very tiny EEG (electroencephalogram) signals obtained from sensors on the scalp, to monitor the brainwaves and provide a corresponding signal (feedback) to the brain. In short, Neurofeedback is brainwave training, a tool for the brain to directly learn flexibility, mental control and increased stability.
To stick with the Dishonored example, an incredibly important distinction for me is whats being tracked by the game. Personally, everything in the screenshot Shamus posted is fine, with the exception of that damn coin count.. All of the supernatural gewgaws can be revealed and homed in on using the Heart, and knowing the exact location but not the route is a simple and generally effective way to pull the player into new situations. Fun. Theyre also usually immediate chunks of additional power, so its in your best interest to seek them out no matter what, no-power runs aside.. Paintings and blueprints tend to be squirreled way in notable side areas and worst case scenario are large enough to stick out like a sore thumb when you use the enhanced vision mode. Potentially annoying, but fine. Some blueprints are minor, others are incredibly useful, so again, worth poking around for even if theyre not an immediate power increase.. But coins…oof. No joke, that coin stat is part of why I bounced ...
To stick with the Dishonored example, an incredibly important distinction for me is whats being tracked by the game. Personally, everything in the screenshot Shamus posted is fine, with the exception of that damn coin count.. All of the supernatural gewgaws can be revealed and homed in on using the Heart, and knowing the exact location but not the route is a simple and generally effective way to pull the player into new situations. Fun. Theyre also usually immediate chunks of additional power, so its in your best interest to seek them out no matter what, no-power runs aside.. Paintings and blueprints tend to be squirreled way in notable side areas and worst case scenario are large enough to stick out like a sore thumb when you use the enhanced vision mode. Potentially annoying, but fine. Some blueprints are minor, others are incredibly useful, so again, worth poking around for even if theyre not an immediate power increase.. But coins…oof. No joke, that coin stat is part of why I bounced ...
Neurofeedback requires the child to be motivated to complete the full treatment. If the child gets bored, the treatment wont work as well.. The child has to be at the right age for the treatment. If he is too young, he will not be able to do what he needs to do. As he gets older, it may become boring for him. Also, the older the patient gets, the harder it is to make the EEG changes. Adults have a more difficult time getting good results with this treatment than children.. Finally, this treatment does not work for everybody. I have not seen any hard data on what the percentages are. The leading proponents claim that the success rate is greater than 90%.. Is this true? Probably not. One therapist told me that he feels it might help only about 50% of the patients. The trouble is that you dont know whom it is going to help until you are very far into the program. It make take over twenty sessions before you know things are not going well. That is a lot of money and time invested in a treatment ...
Diann Wingert, LCSW, BCD - The Low Energy Neurofeedback System is a bioelectrical therapy that can help people who feel mentally stuck or overwhelmed.
Insomnia is an epidemic in the US. Neurofeedback (NFB) is a little used, psychophysiological treatment with demonstrated usefulness for treating insomnia. Our objective was to assess whether two disti
Researchers have long been interested in whether particular temperamental traits in childhood connote risk for depressive disorders. For example, children characterized as having high negative emotionality (NE; sadness, fear, anger) and low positive emotionality (PE; anhedonia, listlessness, and lack of enthusiasm) are hypothesized to be at risk for depression. Few studies, however, have examined whether (and how) these two temperamental dimensions interact to confer risk. In a sample of 329 preschoolers, the present study addressed this question by examining the relation between PE and NE and asymmetry in resting EEG activity in frontal and posterior regions, which are putative biomarkers for depression. Using a laboratory battery to define temperament, we found an interaction of PE and NE on posterior asymmetry. Specifically, when PE was high, NE was associated with greater relative right activity. When PE was low, NE was not related to posterior asymmetry. These results were driven by ...
Our results reveal that low-intensity, pulsed FUS sonication suppressed the number of epileptic signal bursts observed in EEG recordings after the induction of acute epilepsy via intraperitoneal injection of PTZ. The presence of the suppressive effect was found in terms of the number of epileptic EEG spikes from the analysis of the unfiltered (Figure 4A) and theta-band (Figure 4B) EEG activity. FUS-mediated reduction of epileptic EEG activity was most notably observed in the theta band. EEG theta activity has also been consistently reported to have a positive correlation with the level of epilepsy [33-35]. Thus, our findings may offer more information with regard to the possible mechanisms involved in the reduction of epileptic activity (for example, the region-specific efficacy of FUS and its manifestation in theta band activity). The assessment of EEG patterns associated with sonication, in the absence of induced epilepsy, will offer rich information on the excitatory or inhibitory influence ...
I found Dr. John after learning about neurofeedback from Bessel Van Der Kolk who thinks neurofeedback is the first thing to do for dysregulated people. Dr. John was the closest person I could find so I make the 7 hour drive each week. Not only am I learning to increase my calm focus brain waves but Dr. John also teaches us resonant breathing to increase vagal tone which has minimized my heart fibrillations since the vagus nerve controls the heart. During our first neurofeedback session we did theta alpha waves with hypnotic suggestions and those suggestions have been extraordinarily effective in my day to day life. Plus Dr. John is also the kindest person who is deeply informed about neuroscience, neurobiology and neurophysiology so you and your loved ones are in safe and capable hands. ...
Recent brain imaging research has revealed oxytocin (OT) effects on an individuals brain activity during social interaction but tells little about whether and how OT modulates the coherence of inter-brain activity related to two individuals coordination behavior. We developed a new real-time coordination game that required two individuals of a dyad to synchronize with a partner (coordination task) or with a computer (control task) by counting in mind rhythmically. Electroencephalography (EEG) was recorded simultaneously from a dyad to examine OT effects on inter-brain synchrony of neural activity during interpersonal coordination. Experiment 1 found that dyads showed smaller interpersonal time lags of counting and greater inter-brain synchrony of alpha-band neural oscillations during the coordination (vs control) task and these effects were reliably observed in female but not male dyads. Moreover, the increased alpha-band inter-brain synchrony predicted better interpersonal behavioral ...
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 ...
Theta activity is one of the most prominent rhythms in the brain and appears to be conserved among mammals. These 4-12 Hz oscillations have been predominantly studied in the dorsal hippocampus where they are correlated with a broad range of voluntary and exploratory behaviors. Theta activity has been also implicated in a number of mnemonic processes, long-term potentiation (LTP) induction and even acting as a global synchronizing mechanism. Moving along the dorso-ventral axis theta activity is reduced in power and desynchronized from the dorsal part. However, theta activity can also be generated in the ventral hippocampus itself during anxiety- and fear-related behaviors. Until now it was unknown which hippocampal cell population was capable to generate theta activity and it was controversial if its origin was local, in the hippocampus, or driven by other brain regions. In this thesis I present compelling in vitro and in vivo evidence that a subpopulation of OLM interneurons (defined by the ...
TY - CONF. T1 - Mathematical Anxiety influences the cortical connectivity profiles in lower alpha band during working memory tasks. AU - Bayrak, Şeyma. AU - Margulies, Daniel. AU - Bamidis, Panagiotis. AU - Klados, Manousos A.. PY - 2016/7/30. Y1 - 2016/7/30. N2 - Introduction Highly math-anxious (HMA) individuals are characterized by a strong tendency to avoid math, which ultimately undercuts their math competence and forecloses important career paths (Ashcraft, 2002). It is hypothesized that worries and intrusive thoughts associated with math anxiety (MA) reduce working memory resources needed for cognitively demanding math tasks (Chang & Beilock, 2016). However, mental processes that access the memory representations of mathematical knowledge has not been fully uncovered (Ashcraft, 2001). Previous studies indicate that the frontal cortex is dominantly involved in working memory (WM) and more specifically while updating the working memory representations (Smith & Jonides, 1997). Additionally, ...

Hippocampal volume and cortical sources of EEG alpha rhythms in mild cognitive impairment and Alzheimer disease | IRIS Univ....Hippocampal volume and cortical sources of EEG alpha rhythms in mild cognitive impairment and Alzheimer disease | IRIS Univ....

EEG rhythms of interest were delta (2-4 Hz), theta (4-8 Hz), alpha 1 (8-10.5 Hz), alpha 2 (10.5-13 Hz), beta 1 (13-20 Hz), and ... EEG rhythms of interest were delta (2-4 Hz), theta (4-8 Hz), alpha 1 (8-10.5 Hz), alpha 2 (10.5-13 Hz), beta 1 (13-20 Hz), and ... Hippocampal volume and cortical sources of EEG alpha rhythms in mild cognitive impairment and Alzheimer disease. ... Hippocampal volume and cortical sources of EEG alpha rhythms in mild cognitive impairment and Alzheimer disease ...
more infohttps://ricerca.uniba.it/handle/11586/47974

Alpha alpha wave - definition of alpha alpha wave by The Free DictionaryAlpha alpha wave - definition of alpha alpha wave by The Free Dictionary

alpha alpha wave synonyms, alpha alpha wave pronunciation, alpha alpha wave translation, English dictionary definition of alpha ... alpha wave. n. 1. The first letter of the Greek alphabet. See Table at alphabet. 2. The first of a series; the beginning. 3. ... B. CPD alpha particle N (Phys) → partícula f alfa. alpha rhythm, alpha wave N (Physiol) → ritmo m alfa ... Alpha alpha wave - definition of alpha alpha wave by The Free Dictionary https://www.thefreedictionary.com/alpha+alpha+wave ...
more infohttp://www.thefreedictionary.com/alpha+alpha+wave

Spatial correspondence of brain alpha activity component in fMRI and EEG | (2005) | Jeong |  Publications | SpieSpatial correspondence of brain alpha activity component in fMRI and EEG | (2005) | Jeong | Publications | Spie

... we could identify the spatiotemporal components of fMRI activations and EEG activities associated with the alpha rhythm. The ... Spatial correspondence of brain alpha activity component in fMRI and EEG Author(s): Jeong-Won Jeong; Sung-Heon Kim; Manbir ... The resulting dipole sources of EEG alpha activity were spatially transformed to 3D MRIs of the subject and compared to fMRI ... This paper presents a new approach to investigate the spatial correlation of brain alpha activity in functional magnetic ...
more infohttp://spie.org/Publications/Proceedings/Paper/10.1117/12.595393

Features of bioelectric activity of the brain in patients with diff erent forms of migraineFeatures of bioelectric activity of the brain in patients with diff erent forms of migraine

The following frequency ranges were analyzed: delta rhythm, theta rhythm, alpha rhythm, beta rhythm. The spectral powers of the ... It proves that such peculiarity of localization of changes in the specifi c weight of the major rhythms of EEG may form typical ... Analysis of the data of cartograms shows that activation of slow-wave ranges and alpha frequency inhibition was observed ... migraine, status migrainosus, EEG-mapping, frequency range of rhythms, slow-wave activity, fast-wave activity of the brain ...
more infohttp://uvnpn.com.ua/en/archive-of-numbers/2017/volume-25-issue-3-92/features-of-bioelectric-activity-of-the-brain-in-patients-with-diff-erent-forms-of-migraine

α oscillations related to anticipatory attention follow temporal expectations. - Wellcome Centre for Integrative Neuroimagingα oscillations related to anticipatory attention follow temporal expectations. - Wellcome Centre for Integrative Neuroimaging

Alpha-band activity was measured during the occlusion period, in which no stimulus was presented, but target reappearance was ... Alpha desynchronization increased rhythmically, peaking just before the expected reappearance of target times. Analysis of the ... Here we asked whether temporal expectations derived from regular, rhythmic events can modulate ongoing oscillatory alpha-band ... Time-frequency analysis showed that the amplitude of alpha-desynchronization followed the time course of temporal expectations ...
more infohttps://www.win.ox.ac.uk/publications/186619

Circadian rhythm - WikipediaCircadian rhythm - Wikipedia

... deletion of the Rev-ErbA alpha clock gene facilitates diet-induced obesity and changes the balance between glucose and lipid ... The rhythm has an endogenous free-running period that lasts approximately 24 hours. The rhythm persists in constant conditions ... The rhythms are entrainable. The rhythm can be reset by exposure to external stimuli (such as light and heat), a process called ... The sleep-wake rhythm may, in these circumstances, become out of phase with other circadian or ultradian rhythms such as ...
more infohttps://en.bywiki.com/wiki/Circadian_rhythm

Deletion of Rictor in Brain and Fat Alters Peripheral Clock Gene Expression and Increases Blood PressureNovelty and...Deletion of Rictor in Brain and Fat Alters Peripheral Clock Gene Expression and Increases Blood PressureNovelty and...

The nuclear receptors Rev-erbs and RORs integrate circadian rhythms and metabolism. Diab Vasc Dis Res. 2008;5:82-88. doi: ... Rev-Erb-alpha (Rev-Erb-α), and Rorα during a 24-hour cycle in PVAT and in aortic tissue (Figure 5 and Figure S5, respectively ... We found that the circadian rhythm of blood pressure (Figure 1) and locomotor activity (Figure 2) is altered in RictoraP2KO ... Integration of metabolic and cardiovascular diurnal rhythms by circadian clock. Endocr J. 2012;59:447-456. ...
more infohttp://hyper.ahajournals.org/content/66/2/332

Frontiers | Alpha Rhythms in Audition: Cognitive and Clinical Perspectives | PsychologyFrontiers | Alpha Rhythms in Audition: Cognitive and Clinical Perspectives | Psychology

However knowledge about the functional relevance of the auditory alpha rhythm has remained scarce so far. Results from the ... However knowledge about the functional relevance of the auditory alpha rhythm has remained scarce so far. Results from the ... for the existence of an auditory alpha-like rhythm independent of visual or motor generators, something that is occasionally ... for the existence of an auditory alpha-like rhythm independent of visual or motor generators, something that is occasionally ...
more infohttps://www.frontiersin.org/articles/10.3389/fpsyg.2011.00073/full

S06 EEG 2 Alpha Rhythms in the Occipital Lobe | BIOPACS06 EEG 2 Alpha Rhythms in the Occipital Lobe | BIOPAC

S06 EEG 2 Alpha Rhythms in the Occipital Lobe. Home , Curriculum , S06 EEG 2 Alpha Rhythms in the Occipital Lobe ... To examine differences in the level of alpha rhythm activity during mental arithmetic and hyperventilation, compared to the ... The system records and displays the raw EEG together with the alpha wave and alpha-RMS activity. Students compare baseline EEG ... Alpha wave activity and alpha-RMS waveforms are automatically filtered and displayed. ...
more infohttps://www.biopac.com/curriculum/s06-eeg-2-alpha-rhythms-in-the-occipital-lobe/

Thalamocortical Mechanisms for the Anteriorization of Alpha Rhythms during Propofol-Induced Unconsciousness | Journal of...Thalamocortical Mechanisms for the Anteriorization of Alpha Rhythms during Propofol-Induced Unconsciousness | Journal of...

... the normal alpha rhythm (8-13 Hz) in the occipital cortex disappears and a frontal alpha rhythm emerges. This spatial shift in ... In the frontal component an alpha rhythm emerges (Fig. 4A-D). Propofol acts on the frontal circuit to produce alpha in two ways ... thought to be the generators of awake alpha, fire at the alpha frequency, resulting in a peak at the alpha frequency in the ... 2009) Temporal framing of thalamic relay-mode firing by phasic inhibition during the alpha rhythm. Neuron 63:683-696, doi: ...
more infohttp://www.jneurosci.org/content/33/27/11070.long

Article: Thalamic Involvement in the Generation of the Alpha Rhythms | FuturehealthArticle: Thalamic Involvement in the Generation of the Alpha Rhythms | Futurehealth

Alpha its not a simple idling rhythm lets look at alpha generators: The thalamic involvement in the generation of the alpha ... rhythm is being under-valued when looking at the LORETA images of alpha current source generators. ... Thalamic Involvement in the Generation of the Alpha Rhythms - ... Alpha" its not a simple idling rhythm" lets look at alpha ... The alpha power may come from the sources that LORETA identifies, but the thalamus is intimately involved in alpha rhythm ...
more infohttps://www.futurehealth.org/articles/Thalamic-Involvement-in-th-by-Jay-Gunkelman-091106-567.html

Most recent papers with the keyword alpha rhythm | Read by QxMDMost recent papers with the keyword alpha rhythm | Read by QxMD

The desynchronization of alpha and beta oscillations (mu rhythm) in the central scalp EEG during action observation and action ... The resting EEG spectrum of alpha (8-13 Hz) rhythm was measured in 22 healthy subjects who have used the Internet for ... EEG Correlates of the Flow State: A Combination of Increased Frontal Theta and Moderate Frontocentral Alpha Rhythm in the ... Functional cortical source connectivity of resting state electroencephalographic alpha rhythms shows similar abnormalities in ...
more infohttps://www.readbyqxmd.com/keyword/85404

Frontiers | Mindfulness starts with the body: somatosensory attention and top-down modulation of cortical alpha rhythms in...Frontiers | Mindfulness starts with the body: somatosensory attention and top-down modulation of cortical alpha rhythms in...

... view of ST-Mindfulnesss somatic focus as a form of training for optimizing attentional modulation of 7-14 Hz alpha rhythms ... that ST-Mindfulness enhanced attentional regulation of alpha in primary somatosensory cortex (SI). The framework allows us to ... that ST-Mindfulness enhanced attentional regulation of alpha in primary somatosensory cortex (SI). The framework allows us to ... a novel view of ST-Mindfulnesss somatic focus as a form of training for optimizing attentional modulation of 7-14 Hz alpha ...
more infohttps://www.frontiersin.org/articles/10.3389/fnhum.2013.00012/full

The effect of mobile phone electromagnetic fields on the alpha rhythm of (...) - Asociación Vallisoletana de Afectad@s por las...The effect of mobile phone electromagnetic fields on the alpha rhythm of (...) - Asociación Vallisoletana de [email protected] por las...

The effect of mobile phone electromagnetic fields on the alpha rhythm of human electroencephalogram R.J. Croft 1 2 *, D.L. ... The effect of mobile phone electromagnetic fields on the alpha rhythm of human electroencephalogram R.J. Croft 1 2 *, D.L. ... Portada del sitio , Documentos , Estudios Científicos , The effect of mobile phone electromagnetic fields on the alpha rhythm ... The effect of mobile phone electromagnetic fields on the alpha rhythm of human electroencephalogram Bioelectromagnetics ...
more infohttp://www.avaate.org/spip.php?article880

EMF-Portal | Effects of 2G and 3G mobile phones on human alpha rhythms: Resting EEG in adolescents, young adults, and the...EMF-Portal | Effects of 2G and 3G mobile phones on human alpha rhythms: Resting EEG in adolescents, young adults, and the...

Effects of 2G and 3G mobile phones on human alpha rhythms: Resting EEG in adolescents, young adults, and the elderly. med./bio ... 2010): Mobile phone emission modulates inter-hemispheric functional coupling of EEG alpha rhythms in elderly compared to young ... 2008): The effect of mobile phone electromagnetic fields on the alpha rhythm of human electroencephalogram. ... 2007): Mobile phone emission modulates interhemispheric functional coupling of EEG alpha rhythms. ...
more infohttps://www.emf-portal.org/de/article/18143

Alpha a rhythm | definition of alpha a rhythm by Medical dictionaryAlpha a rhythm | definition of alpha a rhythm by Medical dictionary

... alpha a rhythm explanation free. What is alpha a rhythm? Meaning of alpha a rhythm medical term. What does alpha a rhythm mean? ... Looking for online definition of alpha a rhythm in the Medical Dictionary? ... alpha (alpha) rhythm. (redirected from alpha a rhythm) al·pha (α) rhythm. (alfă ridhŭm) 1. A wave pattern in the ... Alpha a rhythm , definition of alpha a rhythm by Medical dictionary https://medical-dictionary.thefreedictionary.com/alpha+a+ ...
more infohttp://medical-dictionary.thefreedictionary.com/alpha+a+rhythm

Sub-second temporal attention modulates alpha rhythms. A high-resolution EEG study. - Nuffield Department of Clinical...Sub-second "temporal attention" modulates alpha rhythms. A high-resolution EEG study. - Nuffield Department of Clinical...

Could orienting attention to a selective point in time influence the alpha rhythms as a function of the SHORT vs. LONG ... In conclusion, temporal attention for a sub-second delay (800 ms) did modulate low-band alpha rhythm over large regions of both ... Compared to the LONG condition (foreperiod), the SHORT condition induced a quicker and stronger ERS at low-band alpha rhythm ( ... of alpha rhythms was computed during an S1-S2 paradigm, in which a visual cue (S1) predicted a SHORT (600 ms) or LONG (1400 ms ...
more infohttps://www.ndcn.ox.ac.uk/publications/8750

Chronic caregiver-related stress linked to diurnal salivary alpha-amylase rhythms - SalimetricsChronic caregiver-related stress linked to diurnal salivary alpha-amylase rhythms - Salimetrics

Chronic caregiver-related stress linked to diurnal salivary alpha-amylase rhythms. Diurnal Salivary Alpha-Amylase Dynamics ... A 3-level unconditional linear spline model was fit to describe the typical sAA diurnal rhythms. Predictors were then added to ... Fewer ADS days were associated with a more flattened sAA diurnal rhythm. Additionally, greater daily care-related stressor ... Objective: The study examined diurnal regulation of salivary alpha-amylase (sAA) in association with daily stressors, adult day ...
more infohttps://www.salimetrics.com/chronic-caregiver-related-stress-linked-to-diurnal-salivary-alpha-amylase-rhythms/

How delays matter in an oscillatory whole-brain spiking-neuron network model for MEG alpha-rhythms at rest. - Oxford centre for...How delays matter in an oscillatory whole-brain spiking-neuron network model for MEG alpha-rhythms at rest. - Oxford centre for...

In the current study, we present a spiking neuron network model that is able to produce noisy, distributed alpha-oscillations, ... We studied how well the model captured the inter-node correlation structure of the alpha-band power envelopes for different ... Alpha-oscillations, Delays, MEG, Resting-state model, SFA, Spike-frequency adaptation, Spontaneous alpha, Adult, Alpha Rhythm, ... How delays matter in an oscillatory whole-brain spiking-neuron network model for MEG alpha-rhythms at rest. ...
more infohttps://www.ohba.ox.ac.uk/publications/440289

Trends in e-Health and m-Health: Technology developments for improved healthcareTrends in e-Health and m-Health: Technology developments for improved healthcare

Portable wireless neurofeedback system of EEG alpha rhythm enhances memory Effect of neurofeedback training (NFT) on ... The trainability of brain rhythm using a neurofeedback system is uncertainty be... ...
more infohttps://www.biomedcentral.com/collections/ehealth

Cued Spatial Attention Drives Functionally-Relevant Modulation of The Mu Rhythm in Primary Somatosensory CortexCued Spatial Attention Drives Functionally-Relevant Modulation of The Mu Rhythm in Primary Somatosensory Cortex

SI Mu-Alpha Rhythms We have developed a model of SI that predicts the origin of the MEG mu rhythm and tactile ERs (Jones et al ... Impact of mu-alpha and mu-beta on detection probabilities We could not use the current data to assess the impact of mu-alpha ... In the somatosensory neocortex in humans, a spontaneous mu rhythm containing a complex of mu-alpha (7-14 Hz) and mu-beta (15-29 ... The historical view of electro-/magneto-encephalography (EEG/MEG) measured alpha rhythms (7-14Hz) as a resting brain state is ...
more infohttp://pubmedcentralcanada.ca/pmcc/articles/PMC2970512/?lang=en-ca

Neural efficiency of experts brain during judgment of actions: a high-resolution EEG study in elite and amateur karate...'Neural efficiency' of experts' brain during judgment of actions: a high-resolution EEG study in elite and amateur karate...

Alpha Rhythm. Athletes*. Brain / physiology*. Cortical Synchronization. Electroencephalography. Female. Humans. Judgment / ... With reference to a pre-stimulus period, the power decrease of alpha (8-12 Hz) rhythms during the video indexed the cortical ... In conclusion, athletes judgment of observed sporting actions is related to less pronounced alpha ERD, as a possible index of ... Regarding the hypothesis of intermediate cortical activity in amateur karate athletes, low- and high-frequency alpha ERD was ...
more infohttp://www.biomedsearch.com/nih/Ral-efficiency-experts-brain-during/19891991.html

Theta w | definition of theta w by Medical dictionaryTheta w | definition of theta w by Medical dictionary

alpha wave. An electroencephalographic deflection often generated by cells in the visual cortex of the brain. See: alpha rhythm ... See also alpha, beta, delta, and theta waves.. C wave in intracranial pressure monitoring, a small rhythmic oscillation in ... See also: rhythm. 2. The elevation of the pulse, felt by the finger or represented in the curved line of the sphygmograph. See ... alpha ws brain waves having a frequency of 8 to 13 per second, typical of a normal person awake in a quiet resting state; they ...
more infohttps://medical-dictionary.thefreedictionary.com/theta+w

Exam 3 Flashcards by Cal Zahn | BrainscapeExam 3 Flashcards by Cal Zahn | Brainscape

The rat would display the circadian rhythm of the donor rat. The host always adopts the donor cycle, even if the cycle were ... controls a bunch of circadian rhythms. Goes to dorsal medial thalamus and causes release of a bunch of hormones. Scn keeps a ... In depressed patients, it only mildly blocks cortisol rather than turning off the cortisol circadian rhythm like normal ... "timegiver" external cues that happen at the same time every day to entrain circadian rhythm ...
more infohttps://www.brainscape.com/flashcards/exam-3-6123539/packs/9271945
  • Atrophy of hippocampus and alteration of resting eyes-closed electroencephalographic (EEG) rhythms represent important features of mild cognitive impairment (MCI) and Alzheimer's disease (AD). (uniba.it)
  • Results showed that the power of occipital, parietal, and temporal alpha 1 sources was maximum inMCI +h, intermediate inMCI −h, and low in AD patients. (uniba.it)
  • When subjects were considered as a unique group, there was a significant linear correlation of hippocampal volume with the magnitude of alpha 1 sources in the parietal, occipital and temporal areas. (uniba.it)
  • EEG rhythms of interest were delta (2-4 Hz), theta (4-8 Hz), alpha 1 (8-10.5 Hz), alpha 2 (10.5-13 Hz), beta 1 (13-20 Hz), and beta 2 (20-30 Hz). (uniba.it)
  • In support of the framework, we describe our previous finding that ST-Mindfulness enhanced attentional regulation of alpha in primary somatosensory cortex (SI). (frontiersin.org)
  • Objective: The study examined diurnal regulation of salivary alpha-amylase (sAA) in association with daily stressors, adult day services (ADS) use, and other caregiving characteristics. (salimetrics.com)
  • The evidence presented in this article corroborates findings from other modalities, indicating that alpha-like activity functionally has an universal inhibitory role across sensory modalities. (frontiersin.org)
  • The thalamus distributes the alpha posteriorly via specific sensory relays, which have a simple return circuit. (futurehealth.org)
  • In depression relapse, we predict ST-Mindfulness's somatic attention competes with internally focused rumination, as internally focused cognitive processes (including working memory) rely on alpha filtering of sensory input. (frontiersin.org)
  • These results support the growing consensus that cue-induced alpha modulation is a functionally relevant sensory gating mechanism deployed by attention. (pubmedcentralcanada.ca)
  • However, allocation of these rhythms following an attentional cue, in anticipation of tactile sensory processing, has not been investigated. (pubmedcentralcanada.ca)
  • The mu rhythm has been documented on subdural recording of both sensory and motor cortex and shows the same characteristics as that seen on surface EEG, including distribution, morphology, and reactivity. (medscape.com)
  • The contrast between the first and second halves of the page illustrates the reactivity of a normal alpha rhythm, with attenuation upon eye opening. (medscape.com)
  • This spatial shift in alpha activity is called anteriorization. (jneurosci.org)
  • We investigated whether spatial attention directed to or away from the hand impacted allocation of mu-alpha and mu-beta, the predictive value of these rhythms for detection, and the impact of cued attention on evoked responses. (pubmedcentralcanada.ca)
  • Our computational model predicts ST-Mindfulness enhances top-down modulation of alpha by facilitating precise alterations in timing and efficacy of SI thalamocortical inputs. (frontiersin.org)
  • Translating this theory into neurophysiology, we hypothesize that with its somatic focus, mindfulness' top-down alpha rhythm modulation in SI enhances gain control which, in turn, sensitizes practitioners to better detect and regulate when the mind wanders from its somatic focus. (frontiersin.org)
  • The polarization within the thalamus sets the base frequency of the alpha, but the cortical rhythm requires a complex multi-layer feedback loop from the thalamus to the cortex, and back to the thalamus. (futurehealth.org)
  • Functional significance of the mu rhythm of human cortex: an electrophysiologic study with subdural electrodes. (medscape.com)
  • Analysis of a second data set showed that, on a trial-by-trial basis, tactile detection probabilities decreased linearly with pre-stimulus mu-alpha and mu-beta power. (pubmedcentralcanada.ca)
  • The contribution of this paper is to show why propofol and other anesthetics known to act through GABA promote alpha frontally but suppress it posteriorly. (jneurosci.org)
  • Regarding the hypothesis of reduced activity in elite karate athletes, low- and high-frequency alpha ERD was less pronounced in dorsal and "mirror" pathways in the elite karate athletes than in the non-athletes. (biomedsearch.com)
  • In conclusion, athletes' judgment of observed sporting actions is related to less pronounced alpha ERD, as a possible index of "neural efficiency" in experts engaged in social cognition. (biomedsearch.com)
  • Could orienting attention to a selective point in time influence the alpha rhythms as a function of the SHORT vs. LONG foreperiod? (ox.ac.uk)
  • The resting EEG spectrum of alpha (8-13 Hz) rhythm was measured in 22 healthy subjects who have used the Internet for recreational purpose. (readbyqxmd.com)
  • The thalamic involvement in the generation of the alpha rhythm is being under-valued when looking at the LORETA images of alpha current source generators. (futurehealth.org)
  • Hyperpolarization of the thalamus slows the alpha, and hypopolarization speeds it up until it desynchronizes at about 16 Hz, and becomes a low voltage fast EEG. (futurehealth.org)
  • A 3-level unconditional linear spline model was fit to describe the typical sAA diurnal rhythms. (salimetrics.com)
  • In healthy conditions, the model generates an alpha rhythm. (utwente.nl)
  • This basic mechanism is the reason alpha-theta training works so well on the low voltage fast EEGs seen so commonly in alcohol addiction. (futurehealth.org)