Human gamma-band activity and behavior

Rieder, Maria; Rahm, Benjamin; Williams, John D.; Kaiser, Jochen

doi:10.1016/j.ijpsycho.2010.08.010

Cited by 66 publications

(49 citation statements)

References 106 publications

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“…Alpha waves (8 -12 Hz) are typically associated with a state of relaxed awareness and reduced cognitive processing, while beta waves (13 -30 Hz) are often associated with a state of active cognitive processing. Gamma waves (30 -80 Hz) are thought to be associated with the complex integration and processing of sensory stimuli, among other behaviors related to perception and awareness, memory, problem solving, and motor skills (Herrmann, Fründ, and Lenz, 2010;Reider et al, 2011). 5 The cognitive processing interpretation of alpha and beta waves partly has its basis in an EEG study by Galin and Ornstein (1972), who found evidence to suggest that a greater amount of alpha activity present in one hemisphere (as compared to the other) during a cognitive task was negatively correlated with that hemisphere's level of active engagement in the task (i.e., more alpha, less active engagement of the hemisphere).…”

Section: Eeg Monitoring and Functionalmentioning

confidence: 99%

Extrasensory Perception and the Brain Hemispheres: Where Does the Issue Stand Now?

Williams¹

2012

Neuroquantology

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For over a century, evidence has been gathered to indicate that the two cerebral hemispheres of the human brain each tend to have their own behavioral specializations. An issue that has long been of interest to parapsychologists is whether the ostensibly anomalous behavioral phenomenon of "extrasensory perception" (ESP), in which a person seems to obtain veridical information about other people, objects, places, or events beyond the range of the body's sensory-motor system, may be a specialized function of either of the brain hemispheres. To address this issue, a review of parapsychological experiments designed to explore the potential relevance of cerebral lateralization to ESP performance was initially conducted by Broughton in 1983. He generally concluded that, although there was some possible indication of a contribution to ESP by the right hemisphere, the results were mixed and possibly confounded by issues of interpretation. In a more concise review conducted in 2002, Alexander found that a limited number of experiments continued to indicate a right hemispheric tendency, although certain others separately indicated left hemispheric involvement. Thus, the issue is still clearly unresolved. This paper seeks to build upon these two previous reviews by providing an updated and broader review of the various findings obtained in the experiments that have been conducted up to the present time. Although several experiments continue to offer modest support for a right hemispheric contribution, general interpretation of the current database remains hindered by a wide degree of variability in experimental methods and outcomes, potentially confounding factors, and the scarcity of additional clarifying data. Thus, while the issue remains unresolved, there appear to be at least some potential avenues for progress in future experiments.

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Section: Eeg Monitoring and Functionalmentioning

confidence: 99%

Extrasensory Perception and the Brain Hemispheres: Where Does the Issue Stand Now?

Williams¹

2012

Neuroquantology

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“…the alpha band frequencies were of particular interest in this regard, given that previous research has associated alpha modulation with inhibition (Jokisch and Jensen 2007) and lower alpha specifically with effortful attention (Klimesch 1999). at the same time, in light of research from both human and animal studies supporting a role for neuronal synchronization in the gamma band underlying feature binding, learning, and memory (herrmann et al 2010;Jensen et al 2007;Rieder et al 2011), we also explored the possibility that fitness-and acute exercise-related differences would be observed in gamma coherence. While current theory and research suggests that gamma synchronization may be critical during the formation of new neural assemblies that undergird learning, theta is known to be involved in memory processing and has been related to gamma (gamma appearing during particular phases within the theta cycle) in studies using intracortical recordings (Mormann et al 2005) and EEG recording (Demiralp et al 2007).…”

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confidence: 99%

The interactive effects of physical fitness and acute aerobic exercise on electrophysiological coherence and cognitive performance in adolescents

et al. 2013

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“…Gamma band activity is related to a variety of functions such as: memory and consciousness [24]. Moreover, gamma band activity has an important role in complex and large movement during eyes opening and visual interpretation [25,26].…”

Section: Brain Regions and Eeg Band Activitiesmentioning

confidence: 99%

“…However, it can be noticed from all the previous studies that particular association was found between gamma band and depolarization process. On the other hand, other studies have shown that gamma band activity could be modulated by a variety of processes such as arousal, languages, object recognition, and long term memory [24,26,44,45]. Therefore, gamma band activity is assumed to reflect the most of cognition tasks [46].…”

Section: Biological Validation Of the Maximum Complexity Increasing Rmentioning

confidence: 99%

“…All of the current experiments were conducted in four groups of subjects: normal awake (NA), normal drowsy (ND), patient awake (PA) and patient drowsy (PD) groups, as shown in Table 1. DWT was used to decompose the EEG band (0 -60 Hz) related to eyes opening periods and eyes closing periods into the gamma (30 -60 Hz), beta (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), alpha (8 -13 Hz), theta (4 -8 Hz) and delta (0 -4 Hz) EEG subbands. ApEn was then estimated for each band at all electrodes corresponding to each of the frontal (F), central (C), (temporal (T), parietal (P), and occipital (O) regions.…”

Section: Introductionmentioning

confidence: 99%

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Effects of subject’s wakefulness state and health status on approximated entropy during eye opening and closure test of routine EEG examination

Alaraj¹,

Fukami²,

Ishikawa³

2012

JBiSE

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This study tested a novel method designed to provide useful information for medical diagnosis and treatment. We measured electroencephalography (EEG) during a test of eye opening and closing, a common test in routine EEG examination. This test is mainly used for measuring the degree of alpha blocking and sensitivity during eyes opening and closing. However, because these factors depend on the subject's awareness, drowsiness can interfere with accurate diagnosis. We sought to determine the optimal EEG frequency band and optimal brain region for distinguishing healthy individuals from patients suffering from several neurophysiological diseases (including dementia, cerebrovascular disorder, schizophrenia, alcoholism, and epilepsy) while fully awake, and while in an early drowsy state. We tested four groups of subjects (awake healthy subjects, drowsy healthy subjects, awake patients and drowsy patients). The complexity of EEG band frequencies over five lobes in the human brain was analyzed using wavelet-based approximate entropy (ApEn). Two-way analysis of variance tested the effects of the two factors of interest (subjects' health state, and subjects' wakefulness state) on five different lobes of the brain during eyes opening and closing. The complexity of the theta and delta bands over frontal and central regions, respectively, was significantly greater in the healthy state during eyes opening. In contrast, patients exhibited increased complexity of gamma band activity over the temporal region only, during eyes-close. The early drowsy state and wakefulness state increased the complexity of theta band activity over the temporal region only during eyes-close and eyes-open states respectively, and this change was significantly greater in control subjects compared with patients. We propose that this method may be useful in routine EEG examination, to aid medical doctors and clinicians in distinguishing healthy individuals from patients, regardless of whether the subject is fully awake or in the early stages of drowsiness.

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Human gamma-band activity and behavior

Cited by 66 publications

References 106 publications

Extrasensory Perception and the Brain Hemispheres: Where Does the Issue Stand Now?

Extrasensory Perception and the Brain Hemispheres: Where Does the Issue Stand Now?

The interactive effects of physical fitness and acute aerobic exercise on electrophysiological coherence and cognitive performance in adolescents

Effects of subject’s wakefulness state and health status on approximated entropy during eye opening and closure test of routine EEG examination

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