Perceiving social interactions in the posterior superior temporal sulcus

Area of Science:

• Neuroscience
• Social Cognition
• Cognitive Psychology

Background:

• Primates possess a sophisticated ability to perceive social characteristics of individuals.
• Understanding social interactions between multiple agents is fundamental to primate social cognition.

Purpose of the Study:

• To identify neural correlates for the representation of social interactions in the human brain.
• To investigate if specific brain regions differentiate between types of social interactions.

Main Methods:

• fMRI study presenting various visual stimuli: social interactions, non-interacting agents, physical object interactions, and individual goal-directed actions.
• Analysis of brain activity, focusing on univariate responses in the posterior superior temporal sulcus (pSTS).

Main Results:

• A significant univariate response was observed in the pSTS when viewing social interactions compared to control stimuli.
• The pSTS demonstrated sensitivity to the nature of social interactions, distinguishing between helping and hindering actions.
• This sensitivity was most pronounced in a subregion of the pSTS and extended to adjacent areas involved in theory of mind and face perception.

Conclusions:

• The posterior superior temporal sulcus (pSTS) plays a critical role in representing social interactions.
• This neural mechanism is not solely based on low-level visual features, attention, or individual agent properties.
• The findings suggest the pSTS underlies our capacity to interpret and navigate complex social environments.