Agent-based representations of objects and actions in the monkey pre-supplementary motor area

Area of Science:

• Neuroscience
• Cognitive Science
• Primate Studies

Background:

• Understanding how the brain processes object information is key for action planning and predicting others' actions.
• The pre-supplementary motor area (F6) plays a role in motor control and action selection.

Purpose of the Study:

• To investigate the role of F6 neurons in representing self and other actions related to objects.
• To explore how object-related neural signals contribute to predicting others' intentions and actions.

Main Methods:

• Monkeys performed object grasping tasks and observed human actions.
• Electrophysiological recordings of F6 neurons were analyzed.
• Time-resolved cross-modal population decoding was employed.

Main Results:

• Identified "action-related neurons" (self-type, other-type, self- and other-type) and "object-related neurons" with similar selectivity.
• Object-related neurons signaled intention and grip type, while action-related neurons encoded general goal attainment.
• F6 neurons integrated object/context information into agent-shared signals, evolving into agent-based goal attainment signals.

Conclusions:

• Neural representations of objects are shared across agents and depend on peripersonal space.
• An "object-mirroring" mechanism may enable prediction of others' actions by simulating them.
• F6 neurons are critical for integrating object information and predicting actions in social contexts.