Flashcards in Tongue: Associated structures/innervation Deck (8)
What is the general sensation for the anterior 2/3 of the tongue?
Lingual Nerve- a branch of the mandibular division of the trigiminal nerve (CN V)
What is the taste innervation of the anterior 2/3 of the tongue?
Chorda Tympani- a branch of the Facial Nerve (CN VII)
What is the nerve innervation for the posterior 1/3 of the tongue?
Glossopharyngeal Nerve (CN IX) for both general sensation and taste
Why are the vallate papillae innervated by the glossopharyngeal nerve (CN IX) when they are on the anterior 2/3 or the tongue?
Because the fibers of the nerve cross within the sulcus terminalis, thus allowing for the glossopharyngeal to innervate the vaallate palillae, and allowing for the gag reflex to occur.
What is the arterial blood supply to the tongue?
Lingual Artery (from the external carotid)
What is the venous drainage from the tongue?
Lingual Vein (to the internal jugular)
What is the direct lymphatic drainage of the tongue?
1) Submental nodes
2) Submandibular nodes
3) Deep cervical nodes