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Grasp-specific motor resonance is influenced by the visibility of the observed actor

Bunday, KL; Lemon, RN; Kilner, JM; Davare, M; Orban, GA; (2016) Grasp-specific motor resonance is influenced by the visibility of the observed actor. Cortex , 84 pp. 43-54. 10.1016/j.cortex.2016.09.002. Green open access

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Abstract

Motor resonance is the modulation of M1 corticospinal excitability induced by observation of others' actions. Recent brain imaging studies have revealed that viewing videos of grasping actions led to a differential activation of the ventral premotor cortex depending on whether the entire person is viewed versus only their disembodied hand. Here we used transcranial magnetic stimulation (TMS) to examine motor evoked potentials (MEPs) in the first dorsal interosseous (FDI) and abductor digiti minimi (ADM) during observation of videos or static images in which a whole person or merely the hand was seen reaching and grasping a peanut (precision grip) or an apple (whole hand grasp). Participants were presented with six visual conditions in which visual stimuli (video vs static image), view (whole person vs hand) and grasp (precision grip vs whole hand grasp) were varied in a 2 × 2 × 2 factorial design. Observing videos, but not static images, of a hand grasping different objects resulted in a grasp-specific interaction, such that FDI and ADM MEPs were differentially modulated depending on the type of grasp being observed (precision grip vs whole hand grasp). This interaction was present when observing the hand acting, but not when observing the whole person acting. Additional experiments revealed that these results were unlikely to be due to the relative size of the hand being observed. Our results suggest that observation of videos rather than static images is critical for motor resonance. Importantly, observing the whole person performing the action abolished the grasp-specific effect, which could be due to a variety of PMv inputs converging on M1.

Type: Article
Title: Grasp-specific motor resonance is influenced by the visibility of the observed actor
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.cortex.2016.09.002
Publisher version: http://dx.doi.org/10.1016/j.cortex.2016.09.002
Language: English
Additional information: © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords: Science & Technology, Life Sciences & Biomedicine, Behavioral Sciences, Neurosciences, Neurosciences & Neurology, Action observation, Motor resonance, MEPs, Videos, F5c, TRANSCRANIAL MAGNETIC STIMULATION, VENTRAL PREMOTOR CORTEX, OBJECT-DRIVEN GRASP, CORTICOSPINAL EXCITABILITY, MIRROR NEURONS, HAND ACTIONS, SURROUND INHIBITION, MACAQUE MONKEY, FACILITATION, HUMANS
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Movement Neurosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Department of Neuromuscular Diseases
URI: https://discovery.ucl.ac.uk/id/eprint/1519888
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