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Two separate frontal components in the N1 wave of the human auditory evoked response
Author(s) -
ALCAINI M.,
GIARD M. H.,
THÉVENET M.,
PERNIER J.
Publication year - 1994
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1994.tb02354.x
Subject(s) - psychology , audiology , interstimulus interval , auditory cortex , scalp , neuroscience , component (thermodynamics) , frontal cortex , electroencephalography , evoked potential , late positive component , electrophysiology , orienting response , communication , event related potential , physics , anatomy , medicine , stimulation , habituation , thermodynamics
Scalp current density analysis of the auditory evoked response to 1‐kHz tone bursts delivered at various interstimulus intervals (ISIs) (from 1 s to 2 min in separate runs) shows that two different frontal components can be observed and functionally dissociated in the N1 time range: one is elicited for all ISIs, peaks at about 95 ms poststimulus, and has a full recovery time below 8 s; the second is elicited only by infrequent stimuli (ISIs > 4 s), peaks around 140 ms, and significantly increases in amplitude with increasing ISIs. The first component can be considered a new obligatory component in N1 elicited simultaneously with the responses in auditory cortex; the later component could correspond to the orienting Component III of Näätänen and Picton (1987).