This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy 1, Subject name: Anatomy
The most common cause of anterior vermis syndrome is _______________. 
Select and explain. 
A. Alcohol abuse, B. An abscess, C. A tumor, D. Lead intoxication
A: Alcohol abuse
Answer: A: Alcohol abuse 
Explanation: Anterior vermis syndrome is a result of chronic alcohol abuse. Patients have dystaxia of the lower limb and trunk. Posterior vermis syndrome involves the flocculonodular lobe; it is most frequently caused by an ependymoma or a medulloblastoma. Patients have truncal dystaxia. Hemispheric syndrome usually is the result of a tumor (astrocytoma) or abscess; patients have arm, leg, trunk, and gait dystaxia.