Chorda Tympani

As part of the facial nerve, the Chorda Tympani enters the temporal bone, separates from the facial nerve, and ascends superiorly in a separate canal to the posterior wall of the middle ear. It is found superomedial to the tympanic membrane. It exits the skull via the petrotympanic fissure and lies deep to the auriculotemporal nerve. It joins the posterior aspect of the lingual branch of the mandibular nerve. The chorda tympani carries visceral afferent (taste) and visceral efferent (secretomotor) sensation. Its parasympathetic fibers innervate the submandibular and sublingual glands.