Parotid Gland: Anatomy, Innervation And Clinical Aspects
Otic Ganglion Location
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It is a small parasympathetic ganglion of 2–3 mm in size (about the size of pin-head) and is located in the infratemporal fossa, just below the foramen ovale. It lies medial to mandibular nerve and lateral to tensor palati muscle.
Otic Ganglion Roots
Parasympathetic root: From lesser petrosal nerve.
Sympathetic root: From sympathetic plexus around middle meningeal artery.
Sensory root: From auriculotemporal nerve.
Motor root: From nerve to medial pterygoid.
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Otic Ganglion Distribution
Parasympathetic (secretomotor) fibres: Supply parotid gland through auriculotemporal nerve.
Sympathetic (vasoconstrictor) fibres: Supply blood vessels of parotid gland through auriculotemporal nerve.
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Sensory fibres: Provide sensory innervation to parotid gland through auriculotemporal nerve.
Motor fibres: Supply three muscles through nerve to medial pterygoid – medial pterygoid, tensor palati and tensor tympani.
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