Functional Networks for Social Communication in the Macaque Monkey

Area of Science:

• Neuroscience
• Primatology
• Cognitive Science

Background:

• Primates rely on communication for social interaction.
• Understanding the neural basis of social communication is crucial.

Purpose of the Study:

• To map brain regions involved in social perception, second-person cognition, and orofacial movement generation in non-human primates.
• To investigate the neural architecture underlying social communication.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to map brain activity.
• Non-human primates were studied to observe neural responses during social communication tasks.

Main Results:

• Face perception, second-person cognition, and face motor networks were largely non-overlapping functional units.
• Second-person context engaged medial prefrontal cortex.
• Orofacial movement production involved distributed subcortical and cortical areas, including homologs of Broca's area for lipsmack movements.

Conclusions:

• The neural architecture for social communication is composed of distinct functional units.
• Expressive orofacial movements generated by lateral premotor cortex may represent an evolutionary precursor to human speech.