CH. XLIV.] THE TWELFTH NERVE 64? 



in a series of bundles, and emerge from a groove between the anterior 

 pyramid and olivary body. It is the motor nerve to the muscles of 

 the tongue (stylo-glossus, hyo-glossus, genio-hyo-glossus, and lingu- 

 ales). The branches of this nerve to the genio-hyoid, thyro-hyoid, 

 sterno-thyroid, sterno-hyoid, and omo-hyoid are branches of the first, 

 second, and third cervical nerves carried down in its sheath and 

 slipped off at various points as descendens (hypoglossi) cervicis. 



