Neural simulation mechanisms and social-emotional function in schizophrenia

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Social dysfunction is a core feature of schizophrenia spectrum disorders (SZ).
• Impaired simulation, the ability to generate internal representations of experiences, is hypothesized to underlie social deficits in SZ.

Purpose of the Study:

• To investigate neural representations during sensorimotor simulation in individuals with SZ and healthy controls (HC).
• To examine the association between simulation-related neural activity and socioemotional function.

Main Methods:

• Utilized a novel functional magnetic resonance imaging (fMRI) task to elicit sensorimotor simulation.
• Identified sensorimotor cortices (SC) using a localizer task for firsthand sensory experiences.
• Compared simulation-related activation in SC between 19 individuals with SZ and 24 HC.

Main Results:

• Simulation engaged sensorimotor cortices (SC) in both SZ and HC groups.
• No group differences in simulation-related SC activation were observed.
• Activation strength within SC during simulation was associated with participants' social function.

Conclusions:

• Simulation elicits specific neural representations within the sensorimotor cortices.
• The strength of these neural representations during simulation may be linked to social functioning in individuals with SZ.