Computerized tomography of the brain in manic-depressive patients--a controlled study

Area of Science:

• Neuroimaging
• Psychiatry
• Radiology

Background:

• Manic-depressive psychosis (bipolar disorder) is a significant mental health condition.
• Understanding the neurobiological underpinnings of psychosis is crucial for diagnosis and treatment.
• Previous studies suggest potential structural brain abnormalities in patients with mood disorders.

Purpose of the Study:

• To investigate the organic brain characteristics in individuals with manic-depressive psychosis.
• To compare brain measurements between manic-depressive patients and healthy controls.
• To identify age-related differences in brain morphology associated with manic-depressive psychosis.

Main Methods:

• Computed tomography (CT) scans of the brain were performed on 40 patients diagnosed with manic-depressive psychosis and 40 age- and sex-matched controls.
• Key measurements included ventricular system dimensions, interhemispheric fissure width, and distances related to the septum-caudate and sylvian fissure.
• Analysis was conducted separately for different age groups (≤49 years and ≥50 years).

Main Results:

• In individuals ≤49 years, a significantly lower left septum-caudate distance (LSC) was observed in the manic-depressive group.
• In individuals ≥50 years, significantly enlarged interhemispheric fissure (IF) and sylvian fissure-to-inner skull (SFIS) widths were found in the manic-depressive group.
• Tendencies towards enlarged third ventricle (HIV) and right anterior horn (RAH) widths, along with earlier cortical atrophy in temporal and occipital lobes, were noted in manic-depressive patients.
• Cerebral asymmetry patterns in manic-depressive patients often showed reversal compared to controls.

Conclusions:

• Structural brain differences are associated with manic-depressive psychosis, varying with age.
• Specific measurements like LSC, IF, and SFIS may serve as potential biomarkers.
• Findings suggest neurodevelopmental and degenerative processes may contribute to the pathophysiology of manic-depressive psychosis.