Neuroanatomy · NEET PG Preparation Anatomy
A patient presents with contralateral loss of pain and temperature sensation over the body, along with ipsilateral Horner syndrome and ipsilateral at…
Practice question from Neuroanatomy (NEET PG Preparation Anatomy), with the correct answer and a step-by-step solution.
medium · MCQ · Q-B70652
A patient presents with contralateral loss of pain and temperature sensation over the body, along with ipsilateral Horner syndrome and ipsilateral ataxia. An infarct in the territory of which artery is most likely?
- A.Anterior inferior cerebellar artery
- B.Posterior inferior cerebellar arteryCorrect answer
- C.Superior cerebellar artery
- D.Paramedian branches of the basilar artery
Solution
This constellation of symptoms defines Lateral Medullary (Wallenberg) Syndrome, caused by occlusion of the Posterior Inferior Cerebellar Artery (PICA) or the vertebral artery. Structures damaged include the spinothalamic tract (contralateral body pain/temperature), descending sympathetic fibers (ipsilateral Horner), and the inferior cerebellar peduncle (ipsilateral ataxia).
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