| Noun | 1. | ganglion - an encapsulated neural structure consisting of a collection of cell bodies or neuronsautonomic ganglion - any of the ganglia of the autonomic system whose unmyelinated fibers innervate the internal organs nervous system, systema nervosum - the sensory and control apparatus consisting of a network of nerve cells neural structure - a structure that is part of the nervous system basal ganglion - any of several masses of subcortical grey matter at the base of each cerebral hemisphere that seem to be involved in the regulation of voluntary movement |