t THE MUSCLES. 



C. Hyoid. 



The hyoid gives insertion to the following muscles : — 



a. By its body and its thyroid cornua — 



1. Sterno-hyoideus. 



2. Subscapulo-hyoideus. 



3. Mylo-hyoideua. 



4. Genio-hyoideus. 



5. Stylo-hyoideus. 



6. Hyoideus magnus. 



7. Hyoideus transversus. 



6. By its branches (styloid cornua aad styloid bones) — 



1. Stylo-hyoideus. 



2. Hyoideus magnus. 



3. Ocoipito-styloideus. 



III. Bones of the Thorax. 

 A. The Ribs and their Cartilages. 



The ribs and costal cartilages give attachment to seventeen muscles :— 



1. Scalenus (Ist). 



2. Serratus anticus (5th to 9th). 



3. Serratus posticus (9th to 18th). 



4. Longissimus dorsi (3rd to 18th). 



5. Transversalis costarum. 



6. Psoas magnus (17th to 18th). 



7. Quadratus lumborum (16th to 18th). 



8. Serratus magnus (1st to 8th). 



9. External iutercostals. 



10. Internal intercostals. 



11. Levatores costarum. 



12. Triangularis stemi (2nd to 8th). 



13. Obliquus abdominis extemus (5th to 18th). 



14. Obliquus abdominis internus (asternal cartilages). 



15. Eectus abdominis (asternal cartilages). 



16. Transversalis abdominis. 



17. Diaphragm (7th to 18th). 



B. Sternum. 



The sternum gives attachment to nine muscles : — 



1. Panniculus cervicalis of the neck. 



2. Sterno-maxillaris. 



3. Sterno-thyro-hyoideus. 



4. Superficial pectorals. 



5. Deep pectorals. 



6. Triangularis sterni. 



7. Eectus abdominis. 



8. Transversalis abdominis. 



9. Diaphragm. 



