This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Unlikely to be involved in lesion of anterior spinal aery is: 
Select and explain. 
A. Pain and temp, B. Vibration and proprioception, C. Pyramidal tract, D. Sphincters
B: Vibration and proprioception
Answer: B: Vibration and proprioception 
Explanation: B i.e. Vibration and Proprioception In anterior spinal aery syndrome all spinal cord function (motor, sensory and autonomic) are lost below the level of lesion with the striking exception of retained vibration and position senseQ.