| 1
.
| Position of acromioclavicular joint |
| 2
.
| Deltoid muscle (divided at clavicular origin) |
| 3
.
| Acromial branch thoracoacromial artery (note articular branch of lateral anterior thoracic nerve accompanying this vessel) |
| 4
.
| Upper pointer: Coracoacromial ligament Lower pointer: Coracohumeral ligament |
| 5
.
| Coracoid process of scapula |
| 6
.
| Pectoralis minor muscle |
| 7
.
| Coracobrachialis muscle |
| 8
.
| Musculocutaneous nerve |
| 9
.
| Axillary artery |
| 10
.
| Axillary vein |
| 11
.
| Left pointer: Biceps brachii muscle (short head covered by fascia) Right pointer: Biceps brachii muscle (tendon of long head visible beneath fascia) |
| 12
.
| Area of confluence of pectoral fascia with fascia of coracobrachialis muscle |
| 13
.
| Axillary lymph nodes (central group) |
| 14
.
| Deltoid muscle (reflected laterally) |
| 15
.
| Subdeltoid bursa (this bursa extends beneath acromial process superiorly and thus forms a common subdeltoid-subacromial bursa) |
| 16
.
| Fascia covering joint capsule of humerus |
| 17
.
| Left pointer: Posterior circumflex artery of humerus Right pointer: Axillary nerve |
| 18
.
| Surgical neck of humerus |
| 19
.
| Tendon of insertion of pectoralis major muscle |
| 20
.
| Pectoralis major muscle (reflected laterally and inferiorly) |
