7 6 OUTLINES OF ANATOMY. 



The union of the heads of the metacarpal bones. 

 Transverse ligament. 



The metacarpo-phalangeal joints, 256-7-8. (260-1-2) 



The metacarpo-phalangeal joints of the four inner fingers. 



Class : Diarthrosis. Subdivision : Ginglymus. 

 Glenoid ligament. 

 Lateral ligaments. 

 Posteriorly. 

 Synovial sac. 

 Arteries. 

 Nerves. 

 Movements. 



The metacarpo-phalangeal joint of the thumb. 



Class : Diarthrosis. Subdivision : Ginglymus. 

 Lateral ligaments. 

 Posterior ligament. 

 Sesamoid bones. 

 Arteries and nerves. 

 Movements. 



The interphalangeal articulations, 258. (262-3) 



Class: Diarthrosis. Subdivision : Ginglymus. 

 Glenoid ligament. 

 Lateral ligaments. 

 Posteriorly. 

 Synovial membrane. 

 Arteries and nerves. 

 Movements. 



THE THORAX AND THORACIC VISCERA. 



The surface of the thorax should now be cleaned of all muscle tissues, exposing the ribs and external 

 intercostal muscles. 



The thorax, or trunk of the body, 935-6. (914-15) 

 Formed : In front. 

 Behind. 

 Laterally. 

 Superior aperture : 



Bounded : In front. 

 Behind. 

 On each side. 



Structures passing through the upper aperture of the thorax, 1136. (1112-13) 

 In the middle line. 

 On each side. 

 Lower opening, or base. 



The structures of the thoracic wall should now be exposed in place, in the order and by the methods 

 indicated. 



Intercostal muscles, 417. (414) 



External intercostals, 417-18-19, (414) 



Origin. Insertion. Structure. Nerve-supply. Relations. 

 External intercostal fascia. 



Divide the external intercostal muscles and the external intercostal fascia near the lower border of 

 each intercostal space. Reflect the external intercostal muscles upward and expose the internal 

 intercostal muscles and the intercostal nerves and vessels. 



Internal intercostals, 419201. (41617) 



Origin. Insertion. Structure. Nerve-supply. Relations. 



Internal intercostal fascia. 



The action of the intercostal muscles. 



Expose and trace two or three of the intercostal nerves, as the second, sixth, and tenth. Exercise care 

 not to injure the pleura. 



