Conflict between gesture representations extinguishes μ rhythm desynchronization during manipulable object...

Area of Science:

• Cognitive Neuroscience
• Motor Control
• Neurophysiology

Background:

• Object perception involves integrating structural and functional information.
• Competition between "grasp-to-move" and "grasp-to-use" gestures can impede action initiation and visual processing.
• Understanding the neural basis of this competition during perception is crucial.

Purpose of the Study:

• To investigate the neurophysiological correlates of competing gesture representations during object perception.
• To examine how object space (peripersonal, boundary, extrapersonal) modulates this competition.
• To explore the role of electroencephalography (EEG) rhythms in action selection.

Main Methods:

• Presentation of 3D conflictual and non-conflictual objects in a virtual reality environment.
• Recording EEG during reach-to-grasp and semantic judgment tasks.
• Analysis of 8-12 Hz (μ and α) rhythm desynchronization across different spatial contexts.

Main Results:

• Gesture conflict impacted μ and α rhythm desynchronization at central and posterior sites.
• Crucially, μ rhythm desynchronization was suppressed for conflictual objects in peripersonal space.
• This suggests spatial context influences the neural processing of competing action affordances.

Conclusions:

• μ rhythm desynchronization is reduced by competition between evoked gestures during object perception.
• Neural motor resonance may play a role in action selection processes.
• Spatial representation influences the neural processing of object affordances and action selection.