Subject's own speech reduces reactivity of the human auditory cortex
Neuroscience LettersPublished 1 April 1999
Jussi Numminen, Riitta Salmelin, Riitta Hari
Citations163
SJR quartileQ2
SJR score0.77
SNIP0.67
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TL;DR
Modulation of the activity of the auditory cortex during own speech on a millisecond time scale was recorded while subjects were reading silently and aloud and was more prominent in responses to ipsilateral than contralateral tones.
Abstract
Previous studies on monkeys have shown that uttering-related cortical areas exert an inhibitory effect on the auditory cortex, and cerebral blood-flow analyses on humans have revealed modulation of the activity of the auditory cortex during own speech. To study this modulation on a millisecond time scale, we recorded neuromagnetic evoked responses to short 1-kHz tones while the subjects were reading silently and aloud. The 100-ms response (M100) of the auditory cortex was delayed by 10-21 ms and its amplitude was dampened by 44-71% during reading aloud compared with reading silently. This effect was more prominent in responses to ipsilateral than contralateral tones, possibly due to a sum effect of diminished ipsilateral input to the cortex and decreased transcallosal excitation.
Keywords
PsychologyNeuroscience
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