29 Dec gating

I borrow a definition I like from a page from the National Institutes of Health.

Broadly defined, sensory gating refers to the brain’s selective processing of sensory stimuli. One such modulatory function is the filtering of repetitive stimuli from the environment. Auditory P50 sensory gating is the brain’s suppression of an evoked response to a brief auditory stimulus presented just after an identical stimulus.¹ This ERP (Evoked Response Potential or Event Related Potential) appears relatively early in the processing stream (about 50 msec) and has been suggested to represent an adaptive mechanism that prevents organisms from becoming overwhelmed with redundant sensory information from the environment (Croft, Lee, Bertolot, & Gruzelier, 2001).