This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
Neurogenic shock in acute spinal injury is due to 
Select and explain. 
A. Loss of sympathetic tone, B. Loss of parasympathetic tone, C. Increased hea rate, D. Vasovagal attack
A: Loss of sympathetic tone
Answer: A: Loss of sympathetic tone 
Explanation: Neurogenic shock presents with hypotension, anormal hea rate or bradycardia and warm peripheries.This is due to unopposed vagal tone resulting from cervical spinal cord injury at or above the level of sympathetic outflow (T1/T5). It should be treated with inotropic suppo,and care should be taken to avoid fluid overloadBailey and love 27e pg: 352