Wallenberg syndrome is a rare condition in which an infarction, or stroke, occurs in the lateral medulla.
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Wallenberg syndrome... Due to occluded intracranial VERTEBRAL artery or PICA (Posterior inferior cerebellar artery... This results in dysfunction at the LATERAL MEDULLA... dizziness, loss of speech, ipslateral facial pain, falls towards the lesion, ipslateral Horner's syndrome, horizontal and vertical nystagmus, diminished gag reflex, loss of pain and temperature on ipslateral face and contralateral body
Diffusion-weighted image (DWI) sequence from a brain MRI showing a right lateral medullary syndrome stroke (aka Wallenberg syndrome).