Superior Limb Muscles

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Author:
mandelyn
ID:
243090
Filename:
Superior Limb Muscles
Updated:
2014-03-12 20:59:45
Tags:
UCMT Anatomy
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Description:
Origin, Insertion and Function of the superior limb muscles
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  1. Rhomboid major origin?
    Spinous processes of T2-T5
  2. Rhomboid major insertion?
    Medial margin of scapula (between spine and inferior angle)
  3. Rhomboid major function?
    • retraction (adduction) of scapula
    • downward rotation of scapula
    • stabilize scapula
  4. Rhomboid minor origin?
    Spinous processes of C7-T1
  5. Rhomboid minor insertion?
    Medial margin of scapula (base of scapular spine)
  6. Rhomboid minor function?
    • retraction (adduction) of scapula
    • downward rotation of scapula
    • stabilize scapula
  7. Levator scapulae origin?
    Transverse processes of C1-C4
  8. Levator scapulae insertion?
    superior angle of scapula
  9. Levator scapulae function?
    • elevation of scapula
    • lateral neck flexion (unilateral)
    • stabilize scapula
  10. Serratus anterior origin?
    Outer surface of ribs 1-9
  11. Serratus anterior insertion?
    medial margin of scapula
  12. Serratus anterior function?
    • protraction (abduction) of scapula
    • upward rotation of scapula
    • stabilize scapula
  13. Trapezius origin?
    • Base of occiput
    • Superior nuchal ligament
    • Spinous processes of C7 and T1-T12
  14. Trapezius insertion?
    • Lateral 1/3 of clavicle
    • Acromion
    • Spine of scapula
  15. Trapezius function?
    • retraction (adduction) of scapula
    • upward rotation of scapula
    • neck extension
    • elevation of scapula
    • depression of scapula
  16. Pectoralis minor origin?
    ribs 3, 4 and 5
  17. Pectoralis minor insertion?
    coracoid process
  18. Pectoralis minor function?
    • protraction (abduction) of scapula
    • downward rotation of scapula
    • active in forced breathing
    • stabilize scapula
  19. Subclavius origin?
    first rib
  20. Subclavius insertion?
    inferior, middle clavicle
  21. Subclavius function?
    • downward rotation of clavicle
    • stabilize clavicle
  22. Supraspinatus origin?
    supraspinous fossa
  23. Supraspinatus insertion?
    Greater tubercle of humerus (superior 1/3)
  24. Supraspinatus function?
    • abduction of shoulder (first 10o)
    • stabilize shoulder joint
  25. Infraspinatus origin?
    infraspinous fossa
  26. Infraspinatus insertion?
    greater tubercle of humerus (middle 1/3)
  27. Infraspinatus function?
    • lateral rotation of shoulder
    • stabilize shoulder joint
  28. Teres minor origin?
    upper lateral margin of scapula
  29. Teres minor insertion?
    greater tubercle of humerus (lower 1/3)
  30. Teres minor function?
    • lateral rotation of shoulder
    • stabilize shoulder joint
  31. Subscapularis origin?
    subscapular fossa
  32. Subscapularis insertion?
    lesser tubercle of humerus
  33. Subscapularis function?
    • medial rotation of shoulder
    • stabilize shoulder joint
  34. Pectoralis major origin?
    • medial half of clavicle
    • sternum
    • costal cartilage of ribs 1-9
  35. Pectoralis major insertion?
    intertubercular groove
  36. Pectoralis major function?
    • medial rotation of shoulder
    • shoulder adduction
    • flexion of an extended shoulder
  37. Latissimus dorsi origin?
    • spinous processes of T7-sacral processes
    • posterior iliac crest
  38. Latissimus dorsi insertion?
    intertubercular groove
  39. Latissimus dorsi function?
    • medial rotation of shoulder
    • shoulder adduction
    • extension of a flexed shoulder
  40. Teres major origin?
    • inferior angle of scapula
    • lateral margin of scapula
  41. Teres major insertion?
    intertubercular groove
  42. Teres major function?
    • medial rotation of shoulder
    • shoulder adduction
    • extension of a flexed shoulder
  43. Deltoid origin?
    • lateral 1/3 of clavicle
    • acromion
    • spine of scapula
  44. Deltoid insertion?
    deltoid tuberosity
  45. Deltoid function?
    • shoulder flexion
    • shoulder extension
    • shoulder abduction (after 10o)
    • weak medial and lateral rotation of shoulder
  46. Coracobrachialis origin?
    coracoid process
  47. Coracobrachialis insertion?
    medial shaft of humerus
  48. Coracobrachialis function?
    shoulder flexion
  49. Brachialis origin?
    anterior distal half of humerus
  50. Brachialis insertion?
    ulnar tuberosity
  51. Brachialis function?
    elbow flexion
  52. Biceps brachii origin?
    • Short Head: coracoid process
    • Long Head: supraglenoid tubercle
  53. Biceps brachii insertion?
    radial tuberosity
  54. Biceps brachii function?
    • elbow flexion
    • shoulder flexion
    • supination
  55. Triceps brachii origin?
    • infraglenoid tubercle
    • posterior shaft of humerus X 2 (distal and proximal)
  56. Triceps brachii insertion?
    olecranon
  57. Triceps brachii function?
    • elbow extension
    • shoulder extension

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