A group of signs/symptoms produced by damage to the dorsolateral regions of the medulla. Deficits may include some or all of the following: 1) Loss of pain and temperature sensation: ipsilateral on face, contralateral on body. 2) Hoarseness, impaired swallowing, diminished gag reflex. 3) Ataxia of ipsilateral arm and leg, falling or veering to the side to the lesion. 4) Somewhat decreased muscle tone in ipsilateral arm and leg (no paralysis). 5) Nystagmus, diplopia. 6) Vertigo. 7) Horner's syndrome. This is the commonest ischemic brainstem stroke.