- Submandibular ganglion
Name = PAGENAME
Latin = ganglion submandibulare
GraySubject = 200
GrayPage = 898
Caption = Distribution of the
maxillaryand mandibular nerves, and the submaxillary ganglion. (Submandibular ganglion visible at bottom left, but not labeled.)
Caption2 = Parasympathetic connections of the submaxillary and superior cervical ganglia. (Submaxillary ganglion labeled at center right.)
submandibular gland, sublingual gland
DorlandsPre = g_02
DorlandsSuf = 12385004
The submandibular ganglion (or submaxillary ganglion in older texts) is part of the human
autonomic nervous system. It is one of four parasympathetic gangliaof the head and neck. (The others are the otic ganglion, pterygopalatine ganglion, and ciliary ganglion).
The submandibular ganglion is responsible for innervation of two
salivary glands: the submandibular glandand sublingual gland.
Location and relations
The submandibular ganglion is small and
fusiformin shape. It is situated above the deep portion of the submandibular gland, on the hyoglossus muscle, near the posterior border of the mylohyoid muscle.
The ganglion 'hangs' by two nerve filaments from the lower border of the
lingual nerve(itself a branch of the mandibular nerve, CN V3). It is suspended from the lingual nerve by two filaments, one anterior and one posterior. Through the posterior of these it receives a branch from the chorda tympaninerve which runs in the sheath of the lingual nerve.
Like other parasympathetic ganglia of the head and neck, the submandibular ganglion is the site of synapse for parasympathetic fibers and carries other types of nerve fiber that do not synapse in the ganglion. In summary, the fibers carried in the ganglion are:
*Sympathetic fibers from the
external carotid plexus, via the facial arteryand its branches. These do not synapse in this ganglion.
Preganglionicparasympathetic fibers from the superior salivatory nucleusof the medulla oblongata, via the chorda tympaniand lingual nerve, which synapse at the origin of:
Postganglionicparasympathetic fibers to the oral mucosaand the submandibular and sublingual salivary glands.
* (NormanAnatomyFig|V, NormanAnatomyFig|VII)
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