This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brainstem lesions and blood supply of CNS, Subject name: Anatomy
[{'content': 'Regarding Weber syndrome all are true EXCEPT \nSelect and explain. \nA. Involvement of dorsal midbrain, B. Contralateral hemiplegia, C. Ipsilateral occulomotor palsy, D. Contralateral parkinsonism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Weber Syndrome - involves damage to ventromedial brainstem (Posterior Cerebral Aery supplies this area) FEATURE : Oculomotor N. injury : Ipsilateral LMN oculomotor paralysis (down & out gaze) with wide fixed pupils Pyramidal system: Contralateral facial & hypoglossal paralysis ( coiconuclear & coicospinal tracts) C/L spastic hemiplegia Substantia nigra : Contralateral parkinsonism (rigidity, tremor)', 'role': 'assistant'}]