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geniculate ganglion : ウィキペディア英語版
geniculate ganglion

The geniculate ganglion (from Latin ''genu'', for "knee") is an L-shaped collection of fibers and sensory neurons of the facial nerve located in the facial canal of the head. It receives fibers from the motor, sensory, and parasympathetic components of the facial nerve and sends fibers that will innervate the lacrimal glands, submandibular glands, sublingual glands, tongue, palate, pharynx, external auditory meatus, stapedius, posterior belly of the digastric muscle, stylohyoid muscle, and muscles of facial expression.
The geniculate ganglion contains special sensory neuronal cell bodies for taste, from fibers coming up from the tongue through the chorda tympani and from fibers coming up from the roof of the palate through the greater petrosal nerve. Sensory and parasympathetic inputs are carried into the geniculate ganglion via the nervus intermedius. Motor fibers are carried via the facial nerve proper. The greater petrosal nerve, which carries preganglionic parasympathetic fibers, emerges from the anterior aspect of the ganglion. So, out of all the fibers passing through geniculate ganglion(1-branchial motor facial nerve proper fibers, 2-psym. presynaptic fibers to submandibular ganglion and pterygopalatine ganglion, 3-afferent fibers of pain temp. and touch from posterior auricular branch, 4-taste fibers from tongue), only 3- and 4- synapse in the geniculate ganglion.
The geniculate ganglion is one of several ganglia of the head and neck. Like the others, it is a bilaterally distributed structure, with each side of the face having a geniculate ganglion.
==Additional images==

File:Gray788.png | Plan of the facial and intermediate nerves and their communication with other nerves.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「geniculate ganglion」の詳細全文を読む



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