Influence of stimulus color on the control of reaching-grasping movements

Experimental Brain Research
M GentilucciM Gangitano

Abstract

This kinematic study aimed to determine whether color is a stimulus property involved in the control of reaching-grasping movements. Subjects reached and grasped a target-object, located either on the right or on the left of the subject's midline. A distractor, placed along the subject's midline, could be randomly presented. The colors, i.e., both chromaticity (red and green stimuli were presented) and lightness, of the target and distractor were varied in experiment 1. Only stimulus lightness and only stimulus chromaticity were varied in experiments 2 and 3, respectively. In experiment 4 subjects matched with their thumb and index finger the size of the target-stimuli presented in experiment 1. Chromaticity (experiments 1 and 3) of the target and distractor influenced grasp, but not reach. Maximal finger aperture was larger during grasping the red than the green target. Data collected in the matching task (experiment 4) confirmed a trend to overestimate the red target and to underestimate the green one. During grasp, hand shaping was influenced by distractor chromaticity when it was different from target chromaticity. Distractor lightness affected reach, but not grasp (experiments 1 and 2). Reach was slower when the distractor...Continue Reading

Citations

Sep 29, 2009·Medical & Biological Engineering & Computing·N Louis, P Gorce
May 10, 2013·PloS One·Rudmer MengerStefan Van der Stigchel
Aug 3, 2010·Attention, Perception & Psychophysics·Takeharu SenoHiroyuki Ito
May 27, 2014·Acta Psychologica·A M de HaanH C Dijkerman
Apr 5, 2002·Neuropsychologia·Maurizio Gentilucci
Jul 1, 2008·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·A BonnefoyP Gorce
May 7, 2013·Neuropsychologia·Tatiana Aloi EmmanouilTony Ro
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Mar 13, 2003·Experimental Brain Research·Maurizio Gentilucci
Jun 20, 2003·Neurorehabilitation and Neural Repair·Patricia S PohlSeok Hun Kim
Jun 24, 2017·Journal of Motor Behavior·Ida Egmose, Simo Køppe
May 29, 2021·Frontiers in Human Neuroscience·Marcello CostantiniCorrado Sinigaglia
Nov 18, 2021·Experimental Brain Research·Hana H AbbasJonathan J Marotta

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