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Updated: May 21, 2026

Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping
Published on: June 26, 2012
Electrocorticography links human temporoparietal junction to visual perception
Michael S Beauchamp1, Ping Sun, Sarah H Baum
1Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, Texas, USA. michael.s.beauchamp@uth.tmc.edu
Abstract:
Electrical stimulation of visual cortex can produce a visual percept (phosphene). We electrically stimulated visual cortex in humans implanted with subdural electrodes while recording from other brain sites. Phosphene perception occurred only if stimulation evoked high-frequency gamma oscillations in the temporoparietal junction (TPJ), a brain region associated with visual extinction and neglect. Electrical stimulation of TPJ modified the detectability of low-contrast visual stimuli.
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