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The geniculate ganglion (from Latin genu, for "knee" [1]) is a bilaterally paired special sense ganglion [2] of the intermediate nerve component of the facial nerve (CN VII). [3] It is situated within facial canal of the head .
trigeminal ganglion (CN V) geniculate ganglion (CN VII) spiral ganglion (CN VIII) vestibular ganglion aka Scarpa's ganglion (CN VIII) [2] superior ganglion of glossopharyngeal nerve; inferior ganglion of glossopharyngeal nerve; superior ganglion of vagus nerve; inferior ganglion of vagus nerve
The epibranchial or epipharyngeal placodes generate the distal portion of the ganglia of cranial nerves VII, IX and X: [3] The geniculate placode, associated with the first pharyngeal groove, generates the geniculate ganglion and distal parts of cranial nerve VII; The petrosal placode, associated with the second pharyngeal groove, generates the ...
It contains the sensory and parasympathetic fibers of the facial nerve. Upon reaching the facial canal, it joins with the motor root of the facial nerve at the geniculate ganglion. Alex Alfieri postulates that the intermediate nerve should be considered as a separate cranial nerve and not a part of the facial nerve. [4]
The greater petrosal nerve also conveys some special sensory nerve fibres which carry gustatory (taste) sensory information from the palate [1]: 22 that are relayed to the pterygopalatine ganglion by the lesser palatine nerves and are in turn conveyed to the geniculate ganglion by the greater petrosal nerve to synapse in the ganglion.
This ganglion contains only the sensory fibres of the trigeminal nerve. The geniculate ganglion of the facial nerve (VII), which occurs just after the nerve enters the facial canal. A superior and inferior ganglia of the glossopharyngeal nerve (IX), which occurs just after it passes through the jugular foramen.
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Geniculate ganglionitis or geniculate neuralgia (GN), also called nervus intermedius neuralgia, Ramsay Hunt syndrome, or Hunt's neuralgia, is a rare disorder characterized by severe paroxysmal neuralgic pain deep in the ear, [1] that may spread to the ear canal, outer ear, mastoid or eye regions.