Motor cortex involvement during choice reaction time: a transcranial magnetic stimulation study in man

Brain Research
P RomaiguèreT Hasbroucq

Abstract

It has been shown that transcranial magnetic stimulation can delay simple reaction time; this happens when the stimulation is delivered during the reaction time and over the cortical area which commands the prime mover of the required response. Although it is agreed that magnetic stimulation could be a useful tool for studying information processing in man, we argue that, because of the use of simple reaction time, the results reported so far are difficult to interpret within this theoretical framework. In the present paper, three experiments are reported. Six subjects participated in experiment 1 in which magnetic stimulation was delivered, at different times, during choice reaction time. The effects of the magnetic stimulation of the cortical area involved in the response (induced current passing forward over the motor representation of the responding hand), were compared to the effects of an electrical stimulation of the median nerve (H-reflex). In a first control experiment (experiment 2a; 5 subjects), the coil was placed over the ipsilateral motor cortex (induced current passing backward over the motor representation of the non-responding hand) thus minimizing the probability to excite the same neural nets as in the first ...Continue Reading

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Citations

Jan 21, 2006·Experimental Brain Research·Steven McMillanWinston D Byblow
Mar 1, 2006·Experimental Brain Research·Rolf VerlegerHartwig Siebner
Dec 13, 2007·Experimental Brain Research·Craig Sinclair, Geoffrey R Hammond
Aug 26, 2006·European Journal of Applied Physiology·M NikolovaA R Kossev
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Mar 1, 1997·Brain Research. Cognitive Brain Research·T HasbroucqC A Possamaï
Nov 10, 2009·Cognitive, Affective & Behavioral Neuroscience·Stephen A CoombesJeffery J Summers
Aug 18, 2004·Behavioural Brain Research·Boris SuchanVolker Hömberg
Oct 23, 2003·Psychophysiology·Hiltraut Müller-GethmannGerhard Rinkenauer
Apr 1, 2014·Neuroscience·A J T StevensonI M Franks
Jan 8, 2015·Experimental Brain Research·Sven Bestmann, John W Krakauer
Sep 29, 2006·Journal of Neurophysiology·Mark M Churchland, Krishna V Shenoy

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