142 



SURGICAL ANATOMY OF 



anteriorly, as it lies in the musculo-spiral groove with 

 the superior profunda vessels, before it perforates the 

 septum to pass into the anterior compartment. It also 



FIG. 22. 



A section through the middle of the right upper arm. 1. Biceps. 2. Cephalic 

 vein. 3. Brachial vessels. 4. Musculo-cutaneous nerve. 5. Median nerve. 6. 

 Brachialis anticus. 7. Ulnar nerve. 8. Musculo-spiral nerve. 9. Basilic vein, 

 with internal cutaneous nerves. 10. Superior profunda vessels. 11. Inferior 

 profunda vessels. 12. Triceps, with fibrous intersection. (HEATH.) 



contains the ulnar nerve, which at first lies in the an- 

 terior compartment, in contact with the brachial artery 

 above. 



A correct knowledge of the relations of the layers of 

 these muscles, their aponeuroses, and the course taken 



