Subcortical association with memory performance in schizophrenia: a structural magnetic resonance imaging study

Area of Science:

• Neuroscience
• Psychiatry
• Radiology

Background:

• Memory deficits are a core symptom of schizophrenia.
• Previous research linked hippocampal volume to memory in schizophrenia, but subcortical structures were less explored.

Purpose of the Study:

• To investigate the relationship between memory performance and subcortical regional volumes in a large sample of schizophrenia patients.
• To examine associations beyond the hippocampus in schizophrenia.

Main Methods:

• Structural magnetic resonance imaging (MRI) was used to measure subcortical volumes in 174 schizophrenia patients and 638 healthy comparison subjects.
• Memory and attention were assessed using the Wechsler Memory Scale-Revised (WMS-R).
• Volumes of hippocampus, amygdala, thalamus, nucleus accumbens, caudate, putamen, and globus pallidus were quantified.

Main Results:

• Schizophrenia patients showed significant memory impairments across all WMS-R indices compared to controls.
• Verbal immediate recall and delayed recall were more affected than visual recall and attention.
• Verbal memory scores correlated significantly with both hippocampal and nucleus accumbens volumes in schizophrenia patients.

Conclusions:

• The study confirms the association between hippocampal volume and memory in schizophrenia.
• Nucleus accumbens volume is also significantly associated with memory performance in schizophrenia.
• These findings highlight the role of multiple subcortical structures in memory dysfunction in schizophrenia.