Ventricular-brain ratio

Ventricular-brain ratio (VBR), also known as the ventricle-to-brain ratio or ventricle-brain ratio, is the ratio of total ventricle area to total brain area,^[1] which can be calculated with planimetry from brain imagining techniques such as CT scans.^[2] It is a common measure of ventricular dilation or cerebral atrophy in patients with traumatic brain injury or hydrocephalus ex vacuo.^[3] VBR also tends to increase with age.^[1]

Example of enlarged lateral ventricles in schizophrenia.

Generally, a higher VBR means a worse prognosis for recovering from a brain injury.^[3] For example, VBR is significantly correlated with performance on the Luria-Nebraska neuropsychological battery.^[4] Studies have found people with schizophrenia have larger third ventricles and VBR.^[5] Correlational studies have found relationships between ventricle-brain ratio and binge eating and inversely with plasma thyroid hormone concentration.^[6]

See also

• Sarnoff A. Mednick
• Ventriculomegaly