This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
Lateral medullary syndrome is associated with 
Select and explain. 
A. Dissociative anaesthesia, B. Dense hemianaesthesia, C. Crossed hemianesthesia, D. No sensory defect
A: Dissociative anaesthesia
Answer: A: Dissociative anaesthesia 
Explanation: Lateral medullary syndrome is a neurological disorder causing a range of symptoms due to ischemia in the lateral pa of the medulla oblongata in the brainstem. The ischemia is a result of a blockage most commonly in the veebral aery or the posterior inferior cerebellar aery Ref Harrison20th edition pg 2334