320 THE MUSCLES. 



2. Long flexor of the fore-arm, or brachial biceps. 



3. Coraco-brachial muscle. 



4. Supraspinatus muscle. 



d. By its posterior border, comprised between the dorsal angle and the corre- 

 sponding portion of the humeral angle, to the 



1. Long extensor of the fore-arm. 



2. Large extensor of the fore-arm. 



3. Adductor of the arm, or teres major. 



4. Long abductor of the arm. 



5. Short abductor of the arm. 



B. BONES OF THE ARM. 



Humerus. 

 The humerus gives insertion to twenty-four muscles : 



a. By its superior extremity, to the 



1. Supraspinatus. 



2. Subspinatus. 



3. Subscapularis. 



4. Small scapulo-humeralis. 



5. Sterno-trochineus, or deep pectoral. 



6. Panniculus carnosus. 



b. By its body, to the 



1. Long abductor of the arm. 



2. Short abductor of the arm. 



3. Coraco-brachial muscle by two points. 



4. Adductor of the arm, or teres major. 



5. Short flexor of the fore-arm, or anterior brachial muscle. 



6. Short extensor of the fore-arm. 



7. Middle extensor of the fore-arm. 



8. Small extensor of the fore-arm, or anconeus muscle. 



9. Anterior extensor of the metacarpus. 



10. Anterior extensor of the phalanges. 



11. Great dorsal muscle. 



12. Mastoido-humeralis muscle. 



13. Sterno-humeralis, or superficial pectoral muscle. 



o. By its inferior extremity, to the 



1. Anterior extensor of the phalanges. 



2. External flexor of the metacarpus. 



3. Oblique flexor of the metacarpus. 



4. Internal flexor of the metacarpus. 



5. Superficial flexor of the phalanges, or perforatus. 



6. Deep flexor of the phalanges, or perforans. 



C. BONES OF THE FORE-ARM. 



I. Radius. 

 The radius gives insertion : 



a. By its upper extremity, to the 



1. Long flexor of the fore-arm, or brachial biceps. 



2. Anterior extensor of the phalanges. 



3. Lateral extensor of the phalanges. 



&. By its body, to the 



1. Short flexor of the fore-arm, or anterior brachial muscle. 



2. Oblique extensor of the metacarpus 



3. Anterior extensor of the phalanges. 



4. Lateral extensor of the phalanges. 



5. Deep flexor of the phalanges, or perforans. 



