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Updated: Apr 16, 2026
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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
Published on: April 21, 2023
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Exploring manual asymmetries during grasping: a dynamic causal modeling approach.
Chiara Begliomini1, Luisa Sartori1, Diego Miotto2
1Department of General Psychology and Center for Cognitive Neuroscience, University of Padova Padova, Italy.
Frontiers in Psychology
|March 12, 2015
Summary
Brain circuits for grasping differ between dominant and non-dominant hands. Increased connectivity in dorsal premotor cortices aids control, especially for the less-skilled left hand during precision grasping.
Area of Science:
- Neuroscience
- Motor Control
- Cognitive Neuroscience
Background:
- Grasping actions involve sensorimotor transformations within specific brain circuits, including the anterior intraparietal sulcus (AIP) and premotor areas (F5, F2).
- Previous human neuroimaging studies primarily focused on dominant (right) hand grasping, leaving control mechanisms for the non-dominant (left) hand under-explored.
Purpose of the Study:
- To investigate how brain connectivity within grasping-related areas differs between dominant (right) and non-dominant (left) hand movements.
- To elucidate the neural basis of hand dominance in controlling precision grasping actions.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to measure brain activity during precision grasping tasks.
- Dynamic causal modeling (DCM) was used to analyze effective connectivity between parieto-frontal grasping-related areas.
Main Results:
- Execution of grasping movements with the left (non-dominant) hand showed boosted inter-hemispheric couplings between dorsal premotor cortices compared to the right hand.
- Dorsal premotor cortices appear crucial for monitoring finger configuration during grasping, with this role becoming more pronounced for the less-skilled left hand.
Conclusions:
- The findings highlight distinct neural control strategies for dominant and non-dominant hand grasping.
- Dorsal premotor cortex connectivity plays a key role in adapting grasping control, particularly when utilizing the non-dominant hand.
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