[Hippocampal Development Deviation and Its Relationship With Cognition in Major Psychiatric Disorders]

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Context:

• Major psychiatric disorders (MPDs) like schizophrenia, bipolar disorder, and major depressive disorder are associated with significant neurodevelopmental abnormalities.
• Investigating specific brain structures, such as the hippocampus, is crucial for understanding the underlying pathophysiology of these conditions.

Purpose:

• To examine deviations in hippocampal development among patients with major psychiatric disorders (MPDs).
• To explore the relationship between hippocampal development deviation and cognitive function in these patient groups.
• To analyze how age moderates hippocampal development deviation in MPDs.

Summary:

• T1-weighted MRI data from 174 schizophrenia, 169 bipolar disorder, 184 major depressive disorder patients, and 321 controls were analyzed using a normative neurodevelopment model to calculate hippocampal deviation scores.
• MPD patients exhibited significantly altered hippocampal development deviation scores compared to healthy controls.
• Age moderated these deviations, with younger patients showing lower scores and older patients showing higher scores. In male schizophrenia patients, right hippocampal deviation correlated with spatial working memory deficits.

Impact:

• Findings indicate abnormal hippocampal development in MPDs, with age-specific patterns, suggesting the hippocampal deviation score as a potential biomarker.
• This research provides a novel perspective for understanding the etiology of major psychiatric disorders.