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The instructed context of a motor task modulates covert response preparation and shifts of spatial attention

Gherri, Elena and van Velzen, J. and Eimer, Martin (2009) The instructed context of a motor task modulates covert response preparation and shifts of spatial attention. Psychophysiology 46 (3), pp. 655-667. ISSN 0048-5772.

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Official URL: http://dx.doi.org/10.1111/j.1469-8986.2009.00800.x

Abstract

We investigated how covert response preparation is modulated by the instructed cognitive context of a motor task. Participants prepared left-hand or right-hand movements toward or away from the body midline, as indicated by a response cue (S1) presented prior to a go/no-go stimulus (S2). Different participants were instructed that response cues specified the response hand or movement direction, respectively. This emphasis on effector versus movement direction selection modulated lateralized ERP components triggered during the S1–S2 interval. Attention shifts during movement preparation were assessed by measuring ERPs to irrelevant visual probes. Enhanced N1 components were found for probes near the effector when effector selection was emphasized, but for probes near the movement target location when movement direction selection was emphasized. Results demonstrate strong top-down contextual biases on motor control and on the locus of spatial attention during response preparation.

Item Type: Article
Keyword(s) / Subject(s): Attention, motor control, response preparation, cognitive control, event-related potentials
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Psychological Sciences
Depositing User: Administrator
Date Deposited: 22 Dec 2010 16:25
Last Modified: 17 Apr 2013 12:19
URI: http://eprints.bbk.ac.uk/id/eprint/2412

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