LIGAMENTS AND MUSCLES OF THE HORSE. 25 



Insertio7i. — To the deltoid ridge. 



^c^ion. — Extension and inward rotation of shoulder joint ; if 

 the limb is fixed, it bends the neck laterally. 



2. Sterno-maxillaris. 



Origin.— Yrom the cariniform cartilage of the sternum. 



Insertion.— To the angle of inferior maxilla. 



Action. — Tog^iher they depress the head, singly, flex it laterally. 



3. Sterno-thyro-hyoideus. 



Origin. — From the cariniform cartilage of sternum. 

 Insertion.— To the thyroid cartilage of the larynx, and the body 



of hyoid bone. 

 Action.— To depress the hyoid bone and larynx. 



4. SUBSCAPULO-HYOIDEUS. 



Origin.— 'Fvom the fascia of the subscapularis muscle. 

 Insertion. — To the body of the hyoid bone. 

 Action. — To depress the hyoid bone. 



5. Rectus Capitis Anticus Major. 



Origin. — From the transverse processes of the 3rd, 4th and 5th 



cervical vertebrae. 

 Insertion. — To the tubercles at the junction of basilar process of 



occipital, and body of sphenoid. 

 Action.— To^Qihev they depress the head, singly, flex it laterally. 



6. Rectus Capitis Anticus Minor. 



Origin.— Yvom the lower part of the anterior border of atlas. 

 Insertion. — with preceding muscle. 

 Action. — ^3imQ as preceding muscle. 



7. Rectus Capitis Lateralis. 



Origin. — From the atlas external to pseceding. 

 Insertion.— To the styloid process of the occipital. 

 Action. — Same as preceding muscle. 



8. Scalenus. 



Origin. From the transverse processes of the last 4 cervical 



vertebrae. 

 B 



