Applied anatomy and oral surgery for dental students . amber in an upper artificial denture, i. e.,when the air is exhausted by the action of the tongue apartial vacuum is created when the tongue is relaxed,by the action of which the weight of the lower jaw, withthe tongue, is overcome to a certain extent (Cryer)(Fig. 14). The muscles of the tongue are divided into twogroups, the extrinsic group and the intrinsic group. The extrinsic muscles of the tongue are: The hyoglossus,the geniohyoglossus, and the styloglossus. The palato-glossus is also attached to the tongue, but vvill be des-cribed wi
Applied anatomy and oral surgery for dental students . amber in an upper artificial denture, i. e.,when the air is exhausted by the action of the tongue apartial vacuum is created when the tongue is relaxed,by the action of which the weight of the lower jaw, withthe tongue, is overcome to a certain extent (Cryer)(Fig. 14). The muscles of the tongue are divided into twogroups, the extrinsic group and the intrinsic group. The extrinsic muscles of the tongue are: The hyoglossus,the geniohyoglossus, and the styloglossus. The palato-glossus is also attached to the tongue, but vvill be des-cribed with the muscles of the soft palate. The hyoglossus muscle arises from the greater and lessercornua of the hyoid bone, and is inserted into the pos-terior and lateral portions of the tongue. It is suppliedby the hypoglossal nerve. Its action is to aid in depress-ing the tongue. The geniohyoglossus is a fan-shaped muscle arisingfrom the superior genial tubercle of the mandible. Itspreads out and passes backward, its upper fibers being 52 APPLIED ANATOMY. MUSCLES AND FASCIA 53 inserted into the under surface of the body of the tongue,and its lower fibers running to the hyoid bone. Thismuscle is suppHed by the hypoglossal nerve. Its actionis to draw forward and protrude the tongue. The styloglossus muscle arises near the apex of the sty-loid process and passes forward, downward, and inwardto the posterior part of the tongue, where it divides intoa longitudinal portion, passing forward, and an obliqueportion, passing downward. Its nerve-supply is derivedfrom the hypoglossal. The styloglossus assists in re-tracting and elevating the tongue. The intrinsic muscle of the tongue is the lingualis. The principal bulk of the Hngualis is a longitudinalset of muscular fibers, arising at the base and extendingbetween the hyoglossus and the geniohyoglossus musclesto the apex of the tongue. It mingles with the fibersof the extrinsic muscles. The linguaHs is suppHed bythe hypoglossal nerve. Its di
Size: 1495px × 1671px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoriv, bookcentury1900, bookdecade1910, booksubjectanatomy
