This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
A disease that produces decreased inhibitory input to the internal segment of the globus pallidus should have what effect on the motor area of the cerebral coex 
Select and explain. 
A. Increased excitatory feedback directly to the coex, B. No effect, C. Decreased excitatory output from the thalamus to the coex, D. Increased excitatory output from the putamen to the coex
C: Decreased excitatory output from the thalamus to the coex
Answer: C: Decreased excitatory output from the thalamus to the coex 
Explanation: The decrease in inhibition of globus pallidus internus will make its signals more strong.Globus pallidus internus inhibits thalamus. so inhibition of thalamus increases.Thalamus have an excitatory effect on motor coex, this signal is decreased as thalamus is inhibited.