Question

About Weber’s syndrome which is incorrect:

• A. Contralateral hemiplegia
• B. Ipsilateral Oculomotor nerve palsy
• C. Contralateral Parkinsonism
• D. Anterior cerebral peduncle

Answer 1

The Correct Option is D

Weber's syndrome is a condition that arises from a midbrain stroke affecting specific areas. Understanding the key aspects of this syndrome is crucial:

The classic features of Weber’s syndrome include:

• Contralateral hemiplegia: This occurs due to damage to the corticospinal tract, which is located in the cerebral peduncle of the midbrain. This tract carries motor signals from the brain to the opposite side of the body, thus causing weakness or paralysis on the opposite side of the body relative to the lesion.
• Ipsilateral Oculomotor nerve palsy: Damage to the oculomotor nerve root causes deficits in eye movement, eyelid drooping (ptosis), and pupil dilation (mydriasis) on the same side as the lesion.
• Initial Incorrect Statement: Contralateral Parkinsonism. This is incorrect regarding Weber’s syndrome, as the symptoms related to Parkinsonism are not typically associated with this syndrome. Parkinsonism results from degeneration of different midbrain structures, notably the substantia nigra, and not the specific lesions noted in Weber's syndrome.
• Incorrect Option (correct answer): Anterior cerebral peduncle. In Weber's syndrome, it is indeed the posterior part of the cerebral peduncle that is involved, not the anterior. The anterior cerebral peduncle is unrelated to the symptomatology of Weber's syndrome.