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.
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.
|Keyword(s) / Subject(s):||Attention, motor control, response preparation, cognitive control, event-related potentials|
|School:||Birkbeck Schools and Departments > School of Science > Psychological Sciences|
|Date Deposited:||22 Dec 2010 16:25|
|Last Modified:||11 Oct 2016 12:00|
Additional statistics are available via IRStats2.