Orientation of muscles of arm

This presentation shows an orientation of muscles of arm

Transcript

1. THE ARM (Fascia & Muscles)
2. Orientation
3. Compartments of The Arm
4. Intermuscular septa
5. Humerus Medial intermuscular septum Lateral intermuscular septum Anterior (Flexor ) compartment Posterior (extensor) compartment Brachial fascia Deep fascia of the arm
6. Muscles of the Arm Anterior (flexor) 1- Coraco-brachialis. 2- Brachialis. 3- Biceps brachii. Nerve supply: Musculocutaneous & radial nerves. Action: Main flexor of elbow and help in flexion of shoulder joints. Posterior (Extensor) 1- Triceps brachii Nerve supply: Radial nerve. Action: Extension of elbow.
7. Anterior Compartment
8. Muscles of The Anterior Compartment 1- Coraco-brachialis. 2- Brachialis. 3- Biceps brachii.
9. Arrangement of Flexor Muscles
10. Biceps brachii m. Brachialis m. Coraco-brachialis m.
11. Dr. Sherif Fahmy Biceps brachii m. Coraco- brachialis m. Brachialis m. Long head Short head
12. Biceps brachii Triceps brachii Brachialis Medial intermuscular septum
13. Attachments of Flexor Muscles
14. Tip of coracoid process (origin of coraco- brachialis & short head of biceps) Insertion of coraco- brachialis m. Insertion of biceps brachii Insertion of brachialis Groove for long head of biceps brachii Origin of brachialis muscle Origin of long head of biceps m. from supraglenoid tubercle
15. Capsule of shoulder j. Tendon of long head of biceps Synovial sheath Transverse humeral ligament
16. Coraco-brachialis Muscle
17. Dr. Sherif Fahmy Coraco-brachialis muscle Origin: tip of coracoid process Insertion: Middle of medial border of shaft of humerus
18. Action of Coracobrachialis Muscle 1- Assist in adduction of arm at shoulder joint. 2- Assist in flexion of arm at shoulder joint. Nerve supply: - Musculo-cutaneous nerve (C5,6,7)
19. Biceps Brachii
20. Tip of coracoid process (origin of coraco-brachialis & short head of biceps) Insertion of biceps brachii m. Supra-glenoid tubercle (origin of long head of biceps) Bicipital groove
21. Bicipital groove Dr. Sherif Fahmy
22. Radial tuberosity Dr. Sherif Fahmy
24. Capsule of shoulder j. Tendon of long head of biceps Synovial sheath
25. Biceps brachii m. Tendon of biceps Bicipital aponeurosis Brachial art. Median n. Insertion of biceps brachii m.
26. Brachialis Muscle
27. Long head of biceps Short head of biceps Lower 1/3 of biceps Musculo-cutaneous n. Brachialis m. Coraco-brachialis m. Radial nerve
28. Origin of brachialis m. Insertion of brachialis m.: Ulnar tuberosity Intermuscular septa
29. Insertion of deltoid Brachialis m. Insertion of brachialis into ulnar tuberosity
30. Relations of Brachialis Muscle
31. Dr. Sherif Fahmy Brachial artery Median nerve Brachialis m. Biceps brachii m. Musculo-cutaneous n. Superficial Relations
32. Action of brachialis muscle: - Main flexor of elbow. Nerve supply: - Musculo-cutaneous nerve. - Radial nerve to its lateral part.
33. Triceps Brachii Muscle
34. Tendon of Triceps m. Lateral head Long head
35. Long head Lateral head Medial head Tendon of insertion of triceps m. Radial nerve and profunda brachii artery
36. Dr. Sherif Fahmy Long head of triceps Medial head of triceps Anterior view of triceps muscle
37. Attachments of Triceps Muscle
38. Origin of long head of triceps Origin of lateral head of triceps Origin of medial head of triceps Insertion of triceps Spiral groove Origin of articularis cubitii muscle
39. Long head of triceps Lateral head of triceps (cut) Radial n.
40. Articularis Cubiti Muscle Dr. Sherif Fahmy
41. Nerve Supply Radial nerve through the following branches: -To long and medial heads from branches of radial nerve before spiral groove (In axilla). -To lateral and medial heads from branches of radial nerve in the spiral groove. N.B.: Articularis cubiti is supplied by a branch from nerve to medial head of triceps.
42. Action of Triceps -Triceps is the main extensor of elbow. -Long head stabilizes shoulder joint from below during abduction. -Articularis cubiti pulls the capsule of elbow upwards to avoid being insinuated during elbow extension.