Corticospinal modulation induced by sounds depends on action preparedness

Marinovic, Welber, Tresilian, James R., de Rugy, Aymar, Sidhu, Simranjit and Riek, Stephan (2014) Corticospinal modulation induced by sounds depends on action preparedness. Journal of Physiology, 592 1: 153-169. doi:10.1113/jphysiol.2013.254581

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Author Marinovic, Welber
Tresilian, James R.
de Rugy, Aymar
Sidhu, Simranjit
Riek, Stephan
Title Corticospinal modulation induced by sounds depends on action preparedness
Journal name Journal of Physiology   Check publisher's open access policy
ISSN 0022-3751
1469-7793
Publication date 2014-01
Year available 2013
Sub-type Article (original research)
DOI 10.1113/jphysiol.2013.254581
Open Access Status DOI
Volume 592
Issue 1
Start page 153
End page 169
Total pages 17
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell
Collection year 2014
Language eng
Abstract A loud acoustic stimulus (LAS) presented during movement preparation can induce an early release of the prepared action. Because loud sound has been found to have an inhibitory effect on motor cortex excitability, it is possible that the motor cortex plays little role in the early release of prepared responses. We sought to shed new light on this suggestion by probing changes in corticospinal excitability after LAS presentation during preparation for an anticipatory action. Unexpectedly, we show that the changes in corticospinal excitability after LAS presentation are not fixed. Based on the magnitude of motor-evoked potentials elicited by transcranial magnetic and electric stimulation of the motor cortex, we demonstrate that the effects of auditory stimuli on corticospinal excitability depend on the level of readiness for action: inhibition in early preparation and facilitation close to movement onset. We also show that auditory stimuli can regulate intracortical excitability by increasing intracortical facilitation and reducing short-interval intracortical inhibition. Together, these findings indicate that, at least in part, the early release of motor responses by auditory stimuli involves the motor cortex.
Keyword Loud acoustic stimulus
LAS
Movement preparation
Motor responses
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Human Movement and Nutrition Sciences Publications
School of Psychology Publications
 
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