| 1
.
| Teres minor muscle |
| 2
.
| Circumflex scapular artery |
| 3
.
| Teres major muscle |
| 4
.
| Muscular branches of radial nerve |
| 5
.
| Triceps brachii muscle (long head, reflected laterally) |
| 6
.
| Muscular branches brachial artery |
| 7
.
| Triceps brachii muscle (lateral head, reflected laterally; pointer on intramuscular aponeurosis which unites long and lateral heads of muscle) |
| 8
.
| Teres major muscle (area of origin) |
| 9
.
| Radial nerve (retracted medially) |
| 10
.
| Coracobrachialis muscle (in background) |
| 11
.
| Brachial artery |
| 12
.
| Muscular branch of radial nerve (to lateral head of triceps) |
| 13
.
| Upper pointer: Deep brachial artery (continues distally as radial collateral artery) Lower pointer: Body of humerus (covered by periosteum pointer on sulcus of radial nerve) |
| 14
.
| Dorsal antebrachial cutaneous nerve |
| 15
.
| Triceps brachii muscle (medial head) |
| 16
.
| Superior ulnar collateral artery |
| 17
.
| Muscular branch of radial nerve (to lower part of medial head of triceps and to anconeus muscle) |
| 18
.
| Muscular branch of radial nerve (to medial head of triceps) |
| 19
.
| Triceps brachii muscle (transected; upper pointer, lateral head; lower pointer, long head) |
