Geniculate ganglion
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| Nerve: Geniculate ganglion | ||
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| The course and connections of the facial nerve in the temporal bone. | ||
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| Plan of the facial and intermediate nerves and their communication with other nerves. (Geniculate ganglion labeled at top center.) | ||
| Latin | ganglion geniculi nervi facialis | |
| Gray's | subject #202 902 | |
| Dorlands/Elsevier | g_02/12384530 | |
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 both 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.
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 sensory fibers as well as preganglionic parasympathetic fibers, emerges from the anterior aspect of the ganglion.
It is one of the five ganglia of the head and neck, the others being the ciliary, submandibular, sphenopalatine, and otic ganglia. Like the others, it is a bilaterally distributed structure, with each side of the face having a geniculate ganglion.
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