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| between outer border of first rib and medial border of Pectoralis minor muscle. | behind the Pectoralis minor muscle | between medial border of Pectoralis minor muscle and lower border of Teres major muscle |
| | - Skin
- Superficial fascia, platysma and supraclavicular nerves
- Deep fascia
- Clavicular part of the Pectoralis major
- Clavipectoral fascia with cephalic vein, lateral pectoral nerve, and thoracoacromial artery.
- Loop of communication between the lateral and medial pectoral nerves.
| - Skin
- Superficial fascia
- Deep fascia
- Pectoralis major
- Pectoralis minor
| - Skin
- Superficial fascia
- Deep fascia
- In the upper part, there are the pectoralis major and the medial root of the median nerve.
|
| - First intercostal space with the external intercostal muscle.
- First and second digitations of the serratus anterior with the nerve to serratus anterior.
- Medial cord of brachial plexus with its medial pectoral branch.
| - Posterior cord of brachial plexus
- Subscapularis
| - Radial nerve
- Axillary nerve in the upper part
- Subscapularis in the upper part
- Tendons of the latissimus dorsi and the teres major in the lower part
|
| - Lateral and Posterior cords of the brachial plexus.
| - Lateral cord of brachial plexus.
- Coracobrachialis
| - Coracobrachialis
- Musculocutaneous nerve in the upper part
- Lateral root of median nerve in the upper part
- Trunk of median nerve in the lower part.
|
| | - Medial cord of brachial plexus
- Medial pectoral nerve
- Axillary vein
| - Axillary vein
- Medial cutaneous nerve of the forearm and ulnar nerve, between the axillary artery and the axiallary vein.
- Medial cutaneous nerve of arm, medial to the axillary vein.
|
| | - Thoracoacromial trunk
- Lateral thoracic artery
| - Anterior circumflex humeral artery
- Posterior circumflex humeral artery
- Subscapular artery
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