In the nervous system, what are the functions of diverging, converging, reverberating, and parallel after- discharge circuits?

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The inter-connections between neurons are called neural circuits. Neural circuits are of 4 types: diverging, converging, reverberating and parallel after–discharge.

  • In divergent circuits one incoming fiber triggers a response in a large number of new neurons which are part of the circuit. These circuits amplify the signal along the path and they are found in the sensory and well as motor system.
  • Converging circuits work in a manner that is reversed from that of diverging circuits. This circuit causes stimulation and inhibition. They are common in both the sensory as well as motor pathways.
  • In reverberating circuits an incoming signal travels along a chain made up of neurons, each neuron along the path is linked with the previous cell by collateral synapses. These are involved in the control of activities like breathing and the sleep-wake cycle which are rhythmic in nature.
  • Parallel after-discharge circuits consist of both diverging as well as converging pathways. There are differing numbers of synapses in each pathway. These circuits result in a burst of impulses, called the after-discharge. They are involved in complex mental processing.

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