Pectoral Region

This presentation describes Pectoral Region of upper limb

Transcript

1. Pectoral Region
2. Pectoral Region Pectus is the front of the chest. It contains: Muscles: 1. Pectoralis major m. 2. Pectoralis minor m. 3. Subclavius m. Fascia: 1. Pectoral fascia. 2. Clavipectoral fascia. Nerves & Vessels: 1. Nerve and vascular supply of the pectoral region.
3. Orientation of Pectoral Region
4. Clavicle Coracoid process of scapula Lateral lip of intertubercular (bicipital) groove Upper 6 ribs Upper 6 costal cartilages Sternum
5. Pectoral region
6. Cutaneous Nerve Supply of Pectoral Region
7. Supra-clavicular nerve (C3,4)
8. Dissection of Pectoral Region
9. Breast Areola Nipple Pectoralis major m. Deltoid m. Skin (cut) Cephalic vein in delto- pectoral groove Serratus anterior m. Tail of the breast Superficial fascia Deep fascia (Pectoral fascia) Dr. Sherif Fahmy
10. Breast is Removed
11. Fan-shaped Pectoralis major m. Serratus anterior m. External abdominal oblique m. Deltoid m. Delto-pectoral groove Pectoral fascia (deep fascia) Clavicle Anterior axillary fold
12. Pectoralis Major is Removed
13. Subclavius muscle Pectoralis minor m. Axillary artery Axillary vein Brachial plexus Costal cartilages Ribs Sternum Clavicle Dr. Sherif Fahmy
14. Pectoralis minor Clavipectoral fascia Suspensory lig. of axilla Subclavius m. Clavicle Cephalic vein Lateral pectoral nerve Acromio- thoracic artery Sternum
15. Attachments (origin & Insertion) of Pectoral Muscles
16. Anatomy of Any Muscle ➢Name. ➢Site & shape. ➢Attachments (origin & insertion). ➢Nerve supply. ➢Action. ➢Important relations. ➢Applied anatomy.
17. (1) Pectoralis Major Muscle
18. Pectoralis major m. Anterior axillary fold Dr. Sherif Fahmy
19. Clavicle Sternum Upper 6 costal cartilages Lateral lip of bicipital groove Clavicular head Sterno-costal head Bilaminar tendon Dr. Sherif Fahmy
20. Clavicular head Sterno-costal head Lateral lip of bicipital groove Bilaminar tendon Dr. Sherif Fahmy
21. Action of Pectoralis Major M. The whole muscle: 1- Adducts and medially rotates the arm at shoulder joint. A- Clavicular head: Flexes the arm. B- Sternocostal head: Extends the flexed arm and deep inspiratory m. Nerve supply: Lateral & medial pectoral nerves
22. Pectorlis Minor Muscle
23. Pectoralis minor m. Dr. Sherif Fahmy
24. 3rd, 4th & 5th costal cartilages Coracoid process Dr. Sherif Fahmy
25. Pectoralis minor m. Axillary vein 1st part of axillary artery Cords of brachial plexus 3rd part of axillary artery Dr. Sherif Fahmy
26. Pectoralis minor Coracoid process Serratus anterior m.
27. Actions & Nerve Supply of Pectoralis Minor M. 1- Protraction (weak) of the scapula. 2- Downward rotation of the scapula and lowering the shoulder. 3- Deep inspiratory m. Nerve supply: Mainly medial pectoral nerve.
28. Subclavius Muscle
29. Subclavius muscle
30. Upper surface of 1st costo-chondtal junction Groove for subclavius on middle 1/3 of lower surface of clavicle
31. Pectoralis minor Clavipectoral fascia Suspensory ligament of axilla Subclavius m. Dr. Sherif Fahmy Subclavius m. Pectoralis minor m. Contents of axilla Clavi-pectoral fascia is present Clavi-pectoral fascia is removed
32. Action of Subclavius Muscle ➢It pulls the clavicle downwards, fixing it, to prevent excessive movements of shoulder girdle. Nerve supply: ➢Nerve to subclavius.
33. Serratus Anterior Muscle (page 57)
34. Anterior Posterior Serratus Anterior Muscle Pectoralis major m. External abdominal oblique m.
35. Serratus anterior muscle
36. Serratus anterior m.
37. Origin of Serratus Anterior Muscle
38. Origin of serratus anterior muscle Costo-chondral junctions
39. 1st digitation of serratus anterior m. First rib Second rib Tendinous arch
40. Serratus Anterior m. External abdominal oblique m.
41. Attachments of Serratus Anterior M. Origin: -By 8 digitations from outer surface of upper 8 ribs (midway between costo-chondral junctions and angle of ribs). -First digitation arises from 1st & 2nd ribs with tendinous arch inbetween, the other digitations each arises from the rib of the same number. -Lower part interdigitate with upper part of external abdominal oblique muscle. Insertion: -Anterior aspect of medial border of scapula.
42. 1st digitation 2nd & 3rd digitations Lower 5 digitations Digitations of Serratus Anterior Muscle
43. Insertion of Serratus Anterior Muscle
44. Medial border Superior angle Inferior angle
45. 1st digitation 2nd digitation 3rd digitation Lower 5 digitation Superior angle Medial border Inferior angle Insertion Dr. Sherif Fahmy
46. Serratus anterior muscle Long thoracic nerve Nerve Supply
47. Action of Serratus Anterior M. 1- Powerful protraction of scapula (pushing & reaching). 2- Lower 5 digitations upwards rotates the scapula (abduction of arm above 90 degrees). 3- Fix the scapula over chest specially during movement of the scapula. 4- Raise the ribs in forced inspiration.
48. Paralysis of Serratus Anterior Muscle
49. Clavi-pectoral Fascia
50. Pectoralis minor Clavipectoral fascia Suspensor ligament of axilla Subclavius m. Dr. Sherif Fahmy Subclavius m. Pectoralis minor m. Contents of axilla Clavi-pectoral fascia is present Clavi-pectoral fascia is removed
51. Coracoid process Coraco-clavicular ligament Upper 2 costal cartilage Clavipectoral fascia Medial & lateral extensions of clavi-pectoral fascia Pectoralis minor m.
52. Attachments of Clavi-pectoral Fascia Upper: to clavicle at margins of groove of subclavius Medial: to upper 2 costal cartilages Lateral: to coracoid process and coraco-clavicular ligament Lower: It encloses pectoralis minor muscle, then continues to floor of axilla as suspensory ligament of axilla
53. Cephalic vein Acromio-thoracic art. & lateral pectoral nerve Structures that pass through clavipectoral fascia
54. L.S. of anterior wall of axilla Clavicle Subclavius m. Clavi-pectoral fascia Pectoralis minor with fascial sheath Suspensory lig. of axilla Floor of axilla Pectoralis major m. Pectoral fascia Dr. Sherif Fahmy