Structure and Course of the Lesser Petrosal Nerve - The lesser petrosal nerve is also known as the small superficial petrosal nerve. - It is a general visceral efferent (GVE) nerve. - It conveys pre-ganglionic parasympathetic secretomotor fibers for the parotid gland. - The nerve passes through the petrous part of the temporal bone. - It exits the cranial cavity through its own canaliculus. - The nucleus of the lesser petrosal nerve is the inferior salivatory nucleus. - It is considered a continuation of the tympanic nerve. - After arising in the tympanic plexus, it passes through the anterior surface of the petrous part of the temporal bone. - The nerve runs across the floor of the middle cranial fossa. - It exits the skull via the canaliculus innominatus and enters the infratemporal fossa.

Synapse, Distribution, and Innervation of the Lesser Petrosal Nerve - The fibers of the lesser petrosal nerve synapse at the otic ganglion. - Post-ganglionic fibers then travel along with the auriculotemporal nerve before entering the parotid gland. - The nerve distributes its post-ganglionic parasympathetic fibers to the parotid gland. - This distribution occurs via the intraparotid plexus. - The intraparotid plexus consists of branches from the facial nerve in the parotid gland. - The lesser petrosal nerve is related to the tympanic nerve. - It is also related to the glossopharyngeal nerve, specifically its visceral motor component. - These nerves play a role in the innervation of the parotid gland.

References and External Links - The information in this article is sourced from the 20th edition of Gray's Anatomy. - Additional references include 'Gray's Anatomy: The Anatomical Basis of Clinical Practice' by Susan Standring and 'Last's Anatomy' by Chummy S. Sinnatamby. - A diagram of the lesser petrosal nerve can be found on the website 'The Anatomy Lesson' by Wesley Norman. - The course of the lesser petrosal nerve is discussed in an article published in Neurosurgery. - More information on cranial nerves, including the lesser petrosal nerve, can be found on the website of Yale School of Medicine.