Lateral medullary syndrome is caused by thrombosis of -

Ans. is 'c' i.e., Vertebral artery o Lateral medullary syndrome is caused by infarction of a wedge of lateral medulla lying posterior to the inferior olivary' nucleus.o Although the lateral medullary syndrome was traditionally attributed to occlusion in the course of Posterior in ferior cerebellar artery (PICA), careful studies have shown that in 8 out of 10 cases, it is the vertebral artery0 that is occluded by atherothrombosis. In the remainder, either the posterior in ferior cerebellar artery or one of the lateral medullary arteries is occluded.Arterial supply of the medullao Vertebral artery supplies the medulla through its following branches.Arterial suddIv of the medulla|||Paramedian branches of vertebral artery (Anterior spinal artery) it supplies :Posterior inferior cerebellar branch of vertebral artery it supplieso Descending motor pathways in pyramids (corticospinal tract)o Medial lemniscuso hypoglossal nucleuso Basal branch to olivary nucleio Dorsolateral branch that supplies the trigeminal nucleuso Vestibular nucleio Spinothalamic tract