What is a ganglion?

A ganglion refers to a knot-like swelling found in a nerve, where a collection of neuronal cell bodies is located. These structures serve as relay points where signals can be processed, and they play a crucial role in the peripheral nervous system. Ganglia can be involved in various functions, including sensory processing and motor function regulation, as they house the cell bodies of neurons that communicate signals to and from the central nervous system (CNS).

Understanding the distinction between neuronal structures is essential, as ganglia specifically refer to the clustering of neuronal cell bodies, rather than being indicative of neuronal types or fiber bundles.