Human gamma-band activity: a window to cognitive processing.
This review highlights recent developments in research on human cortical oscillations in the gamma-band range (30-100 Hz). Electroencephalography has demonstrated a role of these signals for cognitive functions including visual perception, attention, learning and memory. During auditory processing, magnetoencephalogram has identified oscillatory activity in higher frequency ranges and with a more discrete localization than electroencephalogram. Gamma-band activity increases have been observed in the putative auditory dorsal and ventral processing streams during the processing of auditory spatial and pattern information, respectively. Additional gamma-band activity has been found over the frontal cortex during top-down tasks. Oscillatory activity in the gamma range may serve to assess the temporal dynamics of cortical networks and their interactions.
Kaiser
Jochen
J
Institute of Medical Psychology, Johann Wolfgang Goethe-University, Heinrich-Hoffmann-Str. 10, Frankfurt am Main 2MEG-Center, Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Germany. j.kaiser@med.uni-frankfurt.de
Lutzenberger
Werner
W
D001683:Biological Clocks / Q000502:physiology; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D006801:Humans; D008606:Mental Processes / Q000502:physiology*; D009415:Nerve Net / Q000502:physiology