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Brain Waves

Brain Waves

Brain waves are electrical signals generated by the neurons in the brain, which are regularly monitored to measure mental activities. Brain waves and their frequency ranges can be measured using an electroencephalogram or EEG. There are four main types of brain waves, each with distinct characteristics:

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Related Experiment Video

Updated: Mar 2, 2026

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

[High freuquency oscillatory activity in the human brain].

¹Dept. of Psychology, University of Liverpool, UK.

Zeitschrift Fur Experimentelle Psychologie : Organ Der Deutschen Gesellschaft Fur Psychologie

|January 2, 2001

Summary

Synchronized neural activity in the gamma band (30-95 Hz) is crucial for human cognitive functions like perception and memory. This review covers evoked and induced gamma band activity in EEG and MEG studies.

Area of Science:

Neuroscience
Cognitive Science

Context:

Synchronized neural oscillations in the gamma frequency band (above 20 Hz) in animal visual cortex are linked to temporal feature binding.
This has spurred significant research using noninvasive human electrophysiological recordings.

Purpose:

To review research on evoked and induced gamma band activity in human EEG and MEG, focusing on auditory and visual modalities.
To discuss the role of gamma band activity in perceptual processes, feature integration, language processing, and attentional modulation.

Summary:

Evoked gamma band activity occurs shortly after stimulus onset.
Induced gamma band activity (30-95 Hz) has a latency of 200-400 ms.
Consistent evidence links human cortical gamma band activity to neuronal information processing and cognitive functions, including memory.

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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Published on: December 6, 2016

Infant Auditory Processing and Event-related Brain Oscillations

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Related Experiment Videos

Last Updated: Mar 2, 2026

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Published on: December 6, 2016

Infant Auditory Processing and Event-related Brain Oscillations

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Impact:

Gamma band activity is a significant biomarker for understanding neuronal information processing.
This research provides insights into the functional theories underlying induced gamma band activity.
Highlights the role of gamma oscillations in complex cognitive functions such as perception, integration, and memory.