Axilla

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Anatomy of axilla

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Axilla

  1. 1. 1 AXILLA Maj Rishi Pokhrel Department of anatomy NAIHSwww.slideshare.net
  2. 2. INTRODUCTION • ‘Truncated pyramidal’ space between upper part of arm and chest wall • Has 4 walls, apex, base
  3. 3. 4
  4. 4. SP DEPT OF ANATOMY AFMC 5
  5. 5. 8 Apex •Truncated •Directed upwards and medially •Communicates with neck via cervico axillary canal •Formation • ant – clavicle • post – sup border of scapula • medial – outer border 1st rib
  6. 6. SP DEPT OF ANATOMY AFMC 9 cervico axillary canal
  7. 7. 10 Structures passing through apex • Axillary vessels • Cords of BP • Long thoracic N • LN efferents
  8. 8. 11 Base •Concavity directed below •Boundaries • Ant : anterior axillary fold • Post: posterior axillary fold • Medial: Chest wall • Lateral: arm •Formed by: skin, superficial fasciae, & deep fascia •Deep fascia: axillary fascia extending between Pectoralis Major (ant fold) and Lat Dorsi & Teres Major (post fold) •Supported by Suspensory lig of Axilla
  9. 9. 12 Anterior wall Formed of • clavicle • Pectoralis major & minor • Subclavius • Clavipectoral fascia • Suspensory ligament of axilla
  10. 10. 14 Post wall –Formed by • Subscapularis • Teres major • Lattisimus dorsi
  11. 11. SP DEPT OF ANATOMY AFMC 15 subscapularis teres major lattisimus dorsi
  12. 12. • Upper 4 ribs with intercostal muscles • Serratus ant (upper portion) with fascia • Long thoracic nerve deep to fascia • Intercostobrachial nerve pierce medial wall Medial wall
  13. 13. 17 • Bicipital groove of humerus with • Teres Major • Lattisimus dorsi • Pectoralis major • Long head of biceps • Short head of biceps • Coracobrachialis Lateral wall
  14. 14. 18 Contents • Axillary artery and branches • Axillary vein & tributaries • Brachial Plexus cords & branches • Long Thoracic nerve • Intercostobrachial N • Axillary fat • Areolar tissue • Axillary LN • Axillary tail of breast
  15. 15. SP DEPT OF ANATOMY AFMC 19 Axillary vein
  16. 16. SP DEPT OF ANATOMY AFMC 20 Axillary artery
  17. 17. 22 Axillary lymph nodes • 20-30 in number, embedded in the fibro fatty tissue of Axilla • Drain • Lateral part of breast • Superficial lymphatic vessels from thoraco lumbar region above level of umbilicus • Whole of upper limb except lateral side of arm, forearm, hand.
  18. 18. SP DEPT OF ANATOMY AFMC 23
  19. 19. 25 Axillary lymph nodes • ANTERIOR; (pectoral) along medial wall with Lateral Thoracic vein • POSTERIOR: (Subscapular ) along medial wall with Subscapular vein • LATERAL: along medial side of axillary vein • CENTRAL: in Centre of Axillary fat, Related to Intercostobrachial N • APICAL: at apex of Axilla • INFRACLAVICULAR: on Clavipectoral fascia in deltopectoral groove
  20. 20. 26 ?

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