ANTERIOR ASPECT OF HEAD AND NECK. 



Thyro-hyoid. Origin; oblique line of thyroid cartilage. 

 Insertion; body of hyoid. [412] 



Digastric. Origin (posterior belly) ; digastric groove under 

 mastoid process. Course; at first downward and forward to 

 an intermediate tendon (which is held to the body of the hyoid 

 by a band of cervical fascia), then upward and forward. In- 

 sertion (anterior belly);. oval impression on lower border of 

 mandible close to symphysis. [413] 



Stylo-hyoid. Origin; st\'loid process of temporal. Inser- 

 tion; body of hyoid, by two slips which enclose the Digastric 

 tendon. [413] 



Mylo-hyoid. Origin; lower three-fourths of mylo-hyoid 

 ridge of lower jaw. Insertion; upper body of body of hyoid; 

 the median raphe extending from the hyoid almost to the 

 chin. [413] 



Genio-hyoid. Origin; lower genial tubercle on back of 

 symphysis of lower jaw. Insertion ; body of hyoid. [414] 



Muscles of Tongue. 



Genio-hyo-glossus. Origin; upper genial tubercle behind 

 symphysis of lower jaw. Insertion; body of hyoid bone; 

 tongue from base to tip. [414] 



Hyo-glossus. Origin; body and great cornu of hyoid. In- 

 sertion; side of tongue. [414] 



Stylo-glossus. Origin; lower end of styloid process; stylo- 

 mandibular ligament. Insertion; side and under surface of 

 tongue. [414] 



Palato-glossus. Origin; under surface of soft palate. In- 

 sertion; side of tongue. [415] 



Intrinsic Muscles. Superior lingualis : This extends on the 

 dorsum from base to tip. Inferior lingualis : This is a cylin- 

 drical band on the under surface, between the Hyo-glossus and 

 Genio-hyo-glossus ; some fibres are attached to the hyoid bone. 

 Transverse fibres : These run from the median raphe to the dor- 



F631 



