Abstract:
:Selecting the adequate alternative in choice situations may involve an inhibition process. Here we assessed response implementation during the reaction time of a between-hand choice task with single- or paired-pulse (3 or 15 ms interstimulus intervals [ISIs]) transcranial magnetic stimulation of the motor cortex. The amplitude of the single-pulse motor evoked potential (MEP) initially increased for both hands. At around 130 ms, the single-pulse MEP kept increasing for the responding hand and decreased for the nonresponding hand. The paired-pulse MEP revealed a similar pattern for both ISIs with no effect on short intracortical inhibition and intracortical facilitation measures. The results suggest that the incorrect response implementation was selectively suppressed before execution of the correct response, preventing errors in choice context. The results favor models assuming that decision making involves an inhibition process.
journal_name
Psychophysiologyjournal_title
Psychophysiologyauthors
Tandonnet C,Garry MI,Summers JJdoi
10.1111/j.1469-8986.2010.01121.xsubject
Has Abstractpub_date
2011-04-01 00:00:00pages
462-9issue
4eissn
0048-5772issn
1540-5958pii
PSYP1121journal_volume
48pub_type
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