In this episode of NEURO101, Dr. G dives into Lateral Medullary Syndrome (a.k.a. Wallenberg Syndrome)—a classic brainstem stroke caused by occlusion of the posterior inferior cerebellar artery (PICA) or vertebral artery. Learn how to recognize this unique constellation of symptoms, including vertigo, nystagmus, ipsilateral facial sensory loss, contralateral body pain/temp loss, hoarseness, dysphagia, and Horner syndrome. We review the anatomy, the neurovascular territory, and the clinical reasoning behind this stroke diagnosis.
💡 Did you know? Despite affecting multiple cranial nerves and pathways, consciousness and cognitive function are often preserved in Wallenberg syndrome—making the focused neuro exam a critical tool.
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