The multiform motor cortical output: kinematic, predictive and response coding

Sartori, Luisa, Betti, Sonia, Chinellato, Eris and Castiello, Umberto (2015) The multiform motor cortical output: kinematic, predictive and response coding. Cortex, 70 . pp. 169-178. ISSN 0010-9452

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Abstract

Observing actions performed by others entails a subliminal activation of primary motor cortex reflecting the components encoded in the observed action. One of the most debated issues concerns the role of this output: Is it a mere replica of the incoming flow of information (kinematic coding), is it oriented to anticipate the forthcoming events (predictive coding) or is it aimed at responding in a suitable fashion to the actions of others (response coding)? The aim of the present study was to disentangle the relative contribution of these three levels and unify them into an integrated view of cortical motor coding. We combined transcranial magnetic stimulation (TMS) and electromyography recordings at different timings to probe the excitability of corticospinal projections to upper and lower limb muscles of participants observing a soccer player performing: (i) a penalty kick straight in their direction and then coming to a full stop, (ii) a penalty kick straight in their direction and then continuing to run, (iii) a penalty kick to the side and then continuing to run. The results show a modulation of the observer's corticospinal excitability in different effectors at different times reflecting a multiplicity of motor coding. The internal replica of the observed action, the predictive activation, and the adaptive integration of congruent and non-congruent responses to the actions of others can coexist in a not mutually exclusive way. Such a view offers reconciliation among different (and apparently divergent) frameworks in action observation literature, and will promote a more complete and integrated understanding of recent findings on motor simulation, motor resonance and automatic imitation.

Item Type: Article
Additional Information: Available online 10 February 2015
Keywords (uncontrolled): Action observation; Motor resonance; Transcranial magnetic stimulation; Motor evoked potentials
Research Areas: A. > School of Science and Technology > Design Engineering and Mathematics
Item ID: 19778
Useful Links:
Depositing User: Eris Chinellato
Date Deposited: 05 May 2016 11:34
Last Modified: 31 May 2019 05:19
URI: https://eprints.mdx.ac.uk/id/eprint/19778

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