Motor disturbances in autism implicate involvement of which brain region?

• A. Frontal lobe
• B. Temporal
• C. Cerebellar
• D. Occipital

Answer: (C)

Motor disturbances in autism primarily reflect cerebellar involvement because the cerebellum coordinates movement, posture, balance, timing, and motor learning. When cerebellar circuits develop atypically, children often show hypotonia, dyspraxia, gait abnormalities, and clumsiness—features commonly described in autism. Neuropathologic and imaging studies have found cerebellar changes, such as alterations in Purkinje cells and vermal/hemispheric regions, that relate to motor timing and coordination problems. While the frontal lobe contributes to planning and sequencing of complex movements, and temporal and occipital regions support language, social processing, and visual processing, these areas are less directly tied to the core motor coordination disturbances seen in autism. Hence, the cerebellum is the brain region most implicated in motor disturbances in autism.