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October 2021

Anesthesia and the electrophysiology of auditory consciousness

Journal/Book: Conscious Cogn. 1999; 8: 525 B St, Ste 1900, San Diego, CA 92101-4495, USA. Academic Press Inc. 45-61.

Abstract: Empirical work is reviewed which correlates the presence or absence of various parts of the auditory evoked potential with the disappearance and reemergence of auditory sensation during induction of and recovery from anesthesia. As a result, the hypothesis is generated that the electrophysiological correlate of auditory sensation is whatever neural activity generates the middle latency waves of the auditory evoked potential. This activity occurs from 20 to 80 ms poststimulus in the primary and secondary areas of the auditory cortex. Evidence is presented suggesting that earlier or later waves in the auditory evoked potential do not covary with auditory sensation (as opposed to auditory perception) and it is therefore suggested that they are possibly not the electrophysiological correlates of sensation.

Note: Article Pockett S, Univ Auckland, Dept Psychiat & Behav Sci, Private Bag 92019, Auckland 1, NEW ZEALAND

Keyword(s): MIDDLE-LATENCY RESPONSES; STEADY-STATE RESPONSES; TEMPORAL-LOBE LESIONS; EVOKED-POTENTIALS; GENERAL-ANESTHESIA; CORTICAL-LESIONS; VISUAL-CORTEX; BRAIN-STEM; MEMORY; HUMANS


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