How embodied is cognition? fMRI and behavioral evidence for common neural resources underlying motor planning and mental rotation of bodily stimuli

Author:

Doganci Naz12ORCID,Iannotti Giannina Rita1234,Coll Sélim Yahia1245,Ptak Radek125

Affiliation:

1. Laboratory of Cognitive Neurorehabilitation , Department of Clinical Neurosciences, Faculty of Medicine, , 1206 Geneva , Switzerland

2. University of Geneva , Department of Clinical Neurosciences, Faculty of Medicine, , 1206 Geneva , Switzerland

3. Department of Radiology and Medical Informatics, University Hospitals of Geneva , 1206 Geneva , Switzerland

4. Department of Neurosurgery, University Hospitals of Geneva , 1206 Geneva , Switzerland

5. Division of Neurorehabilitation, University Hospitals of Geneva , 1206 Geneva , Switzerland

Abstract

Abstract Functional neuroimaging shows that dorsal frontoparietal regions exhibit conjoint activity during various motor and cognitive tasks. However, it is unclear whether these regions serve several, computationally independent functions, or underlie a motor “core process” that is reused to serve higher-order functions. We hypothesized that mental rotation capacity relies on a phylogenetically older motor process that is rooted within these areas. This hypothesis entails that neural and cognitive resources recruited during motor planning predict performance in seemingly unrelated mental rotation tasks. To test this hypothesis, we first identified brain regions associated with motor planning by measuring functional activations to internally-triggered vs externally-triggered finger presses in 30 healthy participants. Internally-triggered finger presses yielded significant activations in parietal, premotor, and occipitotemporal regions. We then asked participants to perform two mental rotation tasks outside the scanner, consisting of hands or letters as stimuli. Parietal and premotor activations were significant predictors of individual reaction times when mental rotation involved hands. We found no association between motor planning and performance in mental rotation of letters. Our results indicate that neural resources in parietal and premotor cortex recruited during motor planning also contribute to mental rotation of bodily stimuli, suggesting a common core component underlying both capacities.

Funder

Swiss National Science Foundation

Publisher

Oxford University Press (OUP)

Subject

Cellular and Molecular Neuroscience,Cognitive Neuroscience

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