Impulses which inhibit postsynaptic neuron itself

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"