期刊
CORTEX
卷 96, 期 -, 页码 46-58出版社
ELSEVIER MASSON
DOI: 10.1016/j.cortex.2017.08.034
关键词
Action; Perception; Local; Global; Size
资金
- Economic and Social Research Council (ESRC)
- Economic and Social Research Council [1466430] Funding Source: researchfish
Preparing to grasp objects facilitates visual processing of object location, orientation and size, compared to preparing actions such as pointing. This influence of action on perception reflects mechanisms of selection in visual perception tuned to current action goals, such that action relevant sensory information is prioritized relative to less relevant information. In three experiments, rather than varying movement type (grasp vs point), the magnitude of a prepared movement (power us precision grasps) was manipulated while visual processing of object size, as well as local/global target detection was measured. Early event-related potentials (ERP) elicited by task-irrelevant visual probes were enhanced for larger probes during power grasp preparation and smaller probes during precision grasp preparation. Local targets were detected faster following precision, relative to power grasp cues. The results demonstrate a direct influence of grasp preparation on sensory processing of size and suggest that the hierarchical dimension of objects may be a relevant perceptual feature for grasp programming. To our knowledge, this is the first evidence that preparing different magnitudes of the same basic action has systematic effects on visual processing. (C) 2017 The Authors. Published by Elsevier Ltd.
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