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Following during physically-coupled joint action engages motion area MT+/V5
Léa A S Chauvigné1, Michel Belyk1, Steven Brown1
1NeuroArts Lab, Department of Psychology, Neuroscience & Behaviour, McMaster University, 1280 Main St. West, Hamilton, ON, L8S 4K1, Canada.
Journal of Integrative Neuroscience
|September 12, 2017
Summary
During joint actions, the brain
Area of Science:
- Neuroscience
- Human Motor Control
- Social Cognition
Background:
- Interpersonal coordination in joint actions relies on perceiving a partner's movements.
- Kinesthetic interactions and shared forces enable direct perception of movement during partnered activities.
- Joint actions often involve distinct leader and follower roles, with followers responding to force cues.
Purpose of the Study:
- To investigate neural mechanisms underlying interpersonal coordination in joint action.
- To examine brain activity differences between leading and following roles in haptic interaction.
- To explore the role of sensory processing in responding to force cues during partnered movement.
Main Methods:
- A novel two-person functional MRI (fMRI) study was conducted.
- Trained couple dancers engaged in bimanual contact, alternating leader and follower roles.
- Participants performed improvised joint movements with eyes closed, focusing on force-based interactions.
Main Results:
- The MT+/V5 brain region showed significantly higher activity during the follower role compared to the leader role.
- This finding was unexpected, as MT+/V5 is traditionally associated with visual motion processing.
- Evidence suggests MT+/V5 is involved in processing tactile motion derived from force cues during haptic interaction.
Conclusions:
- The MT+/V5 area plays a crucial role in processing motion based on force cues during joint haptic interactions.
- This brain region is particularly important for followers responding to a leader's force-based movements.
- Findings extend the known function of MT+/V5 beyond visual motion to include tactile motion perception in social contexts.
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