Noback's Human Nervous System, Seventh Edition (HUMAN NERVOUS SYSTEM (NOBACK)) by Strominger Norman L. & Demarest Robert J. & Laemle Lois B

Author:Strominger, Norman L. & Demarest, Robert J. & Laemle, Lois B.
Language: eng
Format: epub
Publisher: Humana Press
Published: 2012-06-06T16:00:00+00:00

Ganglia in the Head

The named ganglia in the head are of two types: (1) sensory ganglia containing the cell bodies of neurons of the first order (equivalent to dorsal root ganglia of the spinal cord) and (2) parasympathetic ganglia. The sensory ganglia, including their associated cranial nerves and functional components, are the trigeminal (Gasserian, semilunar) ganglion and mesencephalic nucleus of n. V (GSA); geniculate ganglion of n. VII (GVA, SVA, GSA); vestibular and spiral ganglia of n. VIII (SSA); superior (GSA) and inferior (SVA) ganglia of n. IX; and superior (GSA) and inferior (SVA) ganglia of n. X (Fig. 14.2). The mesencephalic nucleus of n. V is unique in that it consists of cell bodies of the trigeminal ganglion that are displaced to the brainstem.

The parasympathetic ganglia (GVE), where preganglionic fibers synapse with postganglionic neurons, include the ciliary ganglion of n. III; pterygopalatine (sphenopalatine) and submandibular ganglia of n. VII; and the otic ganglion of n. IX (Fig. 14.3). The numerous ganglia of the vagus nerve (n. X) are located in or near organs of the body (e.g., heart and gastrointestinal tract; Fig. 20.3).

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