Medical Definition of Lesser petrosal nerve
1.
The parasympathetic root of the otic ganglion, derived from the tympanic plexus; it leaves the tympanic cavity through the canal for the lesser petrosal nerve and passes within the cranium to the sphenopetrosal fissure, or to the foramen ovale, or to the petrosal foramen through which it descends to reach the otic ganglion; conveys presynaptic parasympathetic fibres from the glossopharyngeal nerve concerned with secretomotor innervation of the perotid gland.
Synonym: nervus petrosus minor, lesser petrosal nerve.
(05 Mar 2000)
Lexicographical Neighbors of Lesser Petrosal Nerve
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