The twelve pairs of brain nerves include: the first pair of brain nerves is the olfactory nerve; the second pair of brain nerves is the optic nerve; the third pair of brain nerves is the motoneurotic nerve; the fourth pair of brain nerves is the gliding nerve; the fifth pair of brain nerves is the trigeminal nerve; the sixth pair of brain nerves is the abducens nerve; the seventh pair of brain nerves is the facial nerve; the eighth pair is the vestibular nerve; the ninth pair of brain nerves is the glossopharyngeal nerve; the tenth pair is the vagus nerve; the eleventh pair is the The twelfth pair of cerebral nerves is the hypoglossal nerve. Among them, the motor nerve, the gliding nerve, the abducens nerve, the paracentral nerve, and the hypoglossal nerve are motor nerves. The olfactory nerve, optic nerve, and vestibular nerve are sensory nerves. The trigeminal nerve, facial nerve, glossopharyngeal nerve, and vagus nerve are mixed nerves.