ffean 



Mylotyoid 

 Omokyoid- 



Thijro-hijOici. 



Sfmetyeid 



SH/otd at birth 



FIG. 217. Attachments to hyoicl. Observe the area occupied by insertion of Geniohyoid, and how the 

 Hyoglossus encroaches on this area on the body, being also attached to the whole length of the great 

 cornu outside the middle Constrictor. Genioglossus has only a very small area behind Geniohyoid, 

 and Mylohyoid has a linear insertion just above the infra-hyoid muscles. Digastric and Stylohyoid 

 are on the lower edge of the great cornu and do not reach the body, but Thyrohyoid, on the deep side 

 of the edge, reaches also the edge of the body. Ligamentous hyo-epiglottic fibres are attached above 

 the thyrohyoid membrane. Chondroglossus, middle Constrictor, and stylohyoid lig. are attached to 

 the small cornu. The central figure shows the hyoid at birth, cartilaginous but for a centre in one great 

 cornu : observe the cartilaginous bar joining the lesser cornua. In the left-hand figure the relation 

 of mucous membrane and Palato-pharyngeus to the bone is indicated. 





f^utrk. 



X'f. 



FIG. 218. Early conditions of the hyoid and thyroid cartilages : from models. 



