Abnormalities in personal space and parietal-frontal function in schizophrenia.

Area of Science:

• Neuroscience
• Social Cognition
• Psychiatry

Background:

• Schizophrenia is linked to social deficits, including altered personal space.
• The neural mechanisms underlying these social abnormalities remain unclear.

Purpose of the Study:

• To investigate the neural basis of personal space abnormalities in schizophrenia.
• To examine the functioning of a parietal-frontal network involved in personal space monitoring.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to study brain activity in schizophrenic patients and healthy controls.
• Participants viewed visual stimuli depicting faces moving towards them.

Main Results:

• The dorsal intraparietal sulcus (DIPS), part of the parietal-frontal network, showed hyper-responsivity in schizophrenic patients.
• This hyper-responsivity correlated with enlarged personal space and greater negative symptom severity.
• Lower-level visual areas (fusiform face area, middle temporal area) showed normal activity.

Conclusions:

• Altered functioning in parietal-frontal networks contributes to social dysfunction in schizophrenia.
• These neural changes are associated with negative symptoms and altered personal space regulation.