The neurons in the CNS are well organized into numerous different circuits; discuss the three most important ones.

        The neurons in the CNS are organized into several different circuits. Three most important circuits are diverging circuit, converging circuit and the reverberatory circuit.

a)      Diverging Circuit: In this circuit several neurons are stimulated by a signal and the stimulated neurons further stimulate more neurons. When only one neuron is stimulated then it results in contraction of 15,000 muscle fibers in peripheral muscle.

b)      Converging Circuit: In this circuit several signals are received by a neuron but it collects them all before taking an action. There are few neurons in the brain which receive and analyze sensory signals from peripheral as well as control signals from brain before acting.

c)      Reverberatory Circuit: In this circuit many neurons send signals in a circular path manner, as they stimulate every neuron which is next and it keeps happening until the neurons are fatigued. This signal is sent to other parts of the brain as well. Muscular contraction caused by respiration is the result of reverberation in respiratory system.