Hippocampal Hyperconnectivity to the Visual Cortex Predicts Treatment Response

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Hippocampal dysfunction and altered functional connectivity are implicated in psychosis spectrum disorders.
• Antipsychotic medications show potential to modulate these hippocampal alterations.

Purpose of the Study:

• To identify hippocampal connectivity patterns predicting antipsychotic treatment response.
• To examine the modulatory effects of antipsychotics on hippocampal connectivity in two patient cohorts.

Main Methods:

• Prospective study using resting-state fMRI in medication-naïve first-episode psychosis (FEP) and unmedicated schizophrenia (SZ) patients.
• Scans collected before and after 6 weeks of risperidone treatment.
• Analysis of hippocampal connectivity patterns in relation to clinical response.

Main Results:

• Increased hippocampal connectivity to the occipital cortex predicted treatment response in both FEP and SZ cohorts.
• Reduced connectivity to frontal regions predicted response in unmedicated SZ patients.
• A greater reduction in hippocampal connectivity to the visual cortex correlated with better clinical response.

Conclusions:

• Hippocampal-occipital cortex connectivity is a key predictor of antipsychotic treatment response.
• Antipsychotic medications, like risperidone, can modulate hippocampal connectivity, specifically reducing hyperconnectivity to visual cortex regions, leading to improved outcomes.