This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'Pontine transection leads to \nSelect and explain. \nA. Decerebrate rigidity, B. Decorticate rigidity, C. Increased muscle tone, D. Decreased muscle tone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Decreased muscle tone(Ref: Ganong, 25th ed/p.242)Pontine transection leads to the loss of effects of Pontine reticulospinal tractNormal function of pontine reticulospinal tract - mediate excitatory effects. Excites gamma motor neurons to muscle spindles that maintains toneSo, there is decreased muscle tone', 'role': 'assistant'}]