Intervention-specific patterns of cortical function plasticity during auditory encoding in people with schizophrenia.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Schizophrenia involves neurocognitive deficits, particularly in auditory processing and verbal working memory.
• Previous research showed computerized auditory training (AT) improved cognitive performance compared to computer games (CG).

Purpose of the Study:

• To investigate spatiotemporal changes in neural activity patterns specific to AT intervention in schizophrenia.
• To compare neurophysiological effects of AT versus CG interventions using magnetoencephalography (MEG).

Main Methods:

• Participants with schizophrenia underwent 50 hours (approx. 10 weeks) of either AT or CG intervention.
• Magnetoencephalography (MEG) was used to measure high gamma band oscillations (HGO) during auditory encoding before and after interventions.
• Analysis focused on intervention-specific changes in HGO within fronto-temporal cortical regions.

Main Results:

• AT intervention led to specific changes in high gamma activity in the left middle frontal and left middle-superior temporal cortices during stimulus encoding.
• CG intervention showed specific changes in the right medial frontal and supramarginal gyri during encoding, and bilateral temporal cortices during response preparation.
• Both interventions induced significant, yet complementary, patterns of cortical plasticity within a distributed fronto-temporal network.

Conclusions:

• Intensive exposure to AT or visuospatial activities induces distinct neuroplastic changes in schizophrenia.
• These findings emphasize the need to understand specific neurophysiological effects of targeted behavioral interventions.
• Delineating intervention-specific plasticity is crucial for optimizing treatment and avoiding unintended neural consequences.