<prompt> Lateral medullary syndrome or Wallenberg syndrome involves all EXCEPT:5th cranial nerve9th cranial nerve10th cranial nerve12th cranial nerve  <response>: ANSWER: D 12th cranial nerveREF: Harrisons Internal Medicine 17th ed Chapter 364. Cerebrovascular Diseases, Brainstemdisorders by Peter P Urban, Louis R Caplan page 205-207.See previous 2 questions for explanation and table of Brainstem syndromes 