The anterior two-thirds of the tongue send taste signals to the chorda tympani facial nerve.
The front of the tongue's taste buds give rise to the chorda tympani, a branch of the facial nerve, which travels via the middle ear before entering the brain. At the point where the facial nerve leaves the skull by the stylomastoid foramen, it connects to the facial nerve (cranial nerve VII) inside the facial canal. The facial nerve, however, leaves the skull through the petrotympanic fissure and descends in the infratemporal fossa.
The muscles that let you frown, grin, wrinkle your nose, and raise your eyebrows and forehead are all controlled by the facial nerve.
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