PECTORAL REGION

PECTORAL REGION
- Skin
- Superficial fascia
  - Contents
    - BREAST
    - Cutaneous nerves
      - derived from cervical plexus
        
        supraclavicular nerves
        
        medial , lateral and intermediate
        
        supply the skin over upper half of deltoid
        
        from clavicle to second rib
      - intercostal nerves
        
        anterior and lateral cutaneous branches
        
        supply skin below level of second rib
        
        intercostobranchial nerve of T2 supplies
        
        skin of floor of axilla
        
        upper half of medial side of arm
    - cutaneous vessels
      - perforating branches of internal thoracic artery
      - lateral cutaneous nerves are accompanied
        
        lateral cutaneous branches of posterior intercostal arteries
    - platysma
      - supplied by a branch of facial nerve
- Above pectoralis major muscle
  - Deep pectoral fascia
    - covers pectoralis major muscle
- Below pectoralis major muscle
  - Clavipectoral fascia
  - extent
    - clavicle to axillary fascia below
    - upper part splits
      - to enclose subclavius muscle
    - posterior lamina
      - fused to investing layer of deep cervical fascia
    - inferiorly splits to enclose pectoralis minor muscle
  - pierced by
    - lateral pectoral nerve
    - cephalic vein
    - thoracoacromial artery
    - lymphatics passing from breast and pectoral region to apical group of axillary lymph nodes