Exploring manual asymmetries during grasping: a dynamic causal modeling approach

Frontiers in Psychology
Chiara BegliominiUmberto Castiello

Abstract

Recording of neural activity during grasping actions in macaques showed that grasp-related sensorimotor transformations are accomplished in a circuit constituted by the anterior part of the intraparietal sulcus (AIP), the ventral (F5) and the dorsal (F2) region of the premotor area. In humans, neuroimaging studies have revealed the existence of a similar circuit, involving the putative homolog of macaque areas AIP, F5, and F2. These studies have mainly considered grasping movements performed with the right dominant hand and only a few studies have measured brain activity associated with a movement performed with the left non-dominant hand. As a consequence of this gap, how the brain controls for grasping movement performed with the dominant and the non-dominant hand still represents an open question. A functional magnetic resonance imaging (fMRI) experiment has been conducted, and effective connectivity (dynamic causal modeling, DCM) was used to assess how connectivity among grasping-related areas is modulated by hand (i.e., left and right) during the execution of grasping movements toward a small object requiring precision grasping. Results underlined boosted inter-hemispheric couplings between dorsal premotor cortices during ...Continue Reading

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Citations

Oct 7, 2015·Frontiers in Psychology·Kayla D Stone, Claudia L R Gonzalez
Sep 10, 2020·Frontiers in Human Neuroscience·Minji LeeSeong-Whan Lee
Apr 25, 2018·Cerebral Cortex·Henrietta HowellsMarco Catani
Apr 19, 2018·Frontiers in Neuroscience·Chiara BegliominiUmberto Castiello
Apr 1, 2021·Health Information Science and Systems·Phoebe S-H NeoElizabeth A Franz

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Software Mentioned

Anatomy
SPM8 Statistical Parametric Mapping
Matlab
SPM8

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