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
Impulses which inhibit postsynaptic neuron itself 
Select and explain. 
A. Renshaw cell inhibition, B. Presynaptic inhibition, C. Direct inhibition, D. Indirect inhibition
A: Renshaw cell inhibition
Answer: A: Renshaw cell inhibition 
Explanation: Ans. (a) Renshaw cell inhibition(Ref: Ganong, 25th ed/p.122)Renshaw cells are the inhibitory interneurons present in spinal cordRenshaw cells are excited by a motor neuron. In turn, Renshaw cells inhibit the same motor neuron which excites it. This stabilize the firing rate of the motor neuronsAlso called as "negative feedback inhibition"