GANGLION By N., Pam M.S. - May 11, 2013 The collection of cell bodies of neurons that lies outside the central nervous system. Many invertebrates have only distributed ganglia and no centralized nervous system. Compare nucleus. GANGLION: "A ganglion is a collection of cell bodies." Related Psychology Terms SEXUALLY DIMORPHIC NUCLEUS AUTONOMIC GANGLIA NERVE NEUROPIL CENTER MEDIAN AUTONOMIC NERVOUS SYSTEM (ANS) GLOBUS PALLIDUS NERVE TISSUE BASAL GANGLIA TEGMENTUM Cite this page: N., Pam M.S., "GANGLION," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/ganglion/ (accessed August 18, 2019).