Definition

A ganglion is a collection of neuronal cell bodies in the peripheral nervous system. An analogous functional collection of neurons in the central nervous system is called a nucleus. Sensory ganglia are present as spinal ganglia on the dorsal roots of spinal nerves and the sensory roots of cranial nerves. Autonomic ganglia contain motor neurons that comprise the parasympathetic and sympathetic subdivisions of the autonomic nervous system.

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