Quizlet L4Ob5-Trunk/Abd Muscle Origin, Insertion & Action

Print Options

This box will be automatically hidden when printing. ← Back to Set Page


  1. biceps brachii action: flexes the forearm
  2. biceps brachii insertion: radial tuberosity of radius
  3. biceps brachii origin: caracoid process of scapula
  4. brachialis action: flexes forearm
  5. brachialis insertion: coronoid process of ulna
  6. brachialis origin: distal humerus
  7. brachioradialis action: flexes forearm
  8. brachioradialis insertion: styloid process of radius
  9. brachioradialis origin: distal humerus
  10. deltoid action: abducts arm; extends or flexes humerus
  11. deltoid insertion: deltoid tuberosity of humerus
  12. deltoid origin: clavicle, acromion process and spine of scapula
  13. diaphragm action: pulls central tendon down, increasing size of thoracic cavity, inspiration
  14. diaphragm insertion: central tendon
  15. diaphragm origin: xiphoid process, costal cartilages of last six ribs, and lumbar vertebrae
  16. erector spinae action: extends vertebrae and ribs; maintains erectness
  17. erector spinae insertion: ribs, cervical and thoracic vertebrae
  18. erector spinae origin: sacrum, ilium, lumbar and thoracic vertebrae, ribs
  19. extensor carpi radialis longus action: extends and abducts hand
  20. extensor carpi radialis longus insertion: second metacarpal
  21. extensor carpi radialis longus origin: humerus
  22. extensor carpi ulnaris action: extends and adducts wrist
  23. extensor carpi ulnaris insertion: fifth metacarpal
  24. extensor carpi ulnaris origin: humerus and ulna
  25. extensor digitorum superficialis action: extends wrist, hand and digits
  26. extensor digitorum superficialis insertion: middle phalanges of digits
  27. extensor digitorum superficialis origin: ulna and radius
  28. external intercostals action: elevates and draws ribs together-inspiration
  29. external intercostals insertion: superior border of a rib below, external surface
  30. external intercostals origin: inferior border of a rib, external surface
  31. external oblique action: compresses abdomen; lateral rotation
  32. external oblique insertion: iliac crest; linea alba (aponeurosis of midline)
  33. external oblique origin: lower eight ribs
  34. flexor carpi radialis action: flexes wrist and abducts the hand
  35. flexor carpi radialis insertion: second and third metacarpals
  36. flexor carpi radialis origin: humerus
  37. flexor carpi ulnaris action: flexes and adducts the wrist
  38. flexor carpi ulnaris insertion: carpal and metacarpal bones
  39. flexor carpi ulnaris origin: humerus and ulna
  40. internal intercostals action: draws ribs together; depresses thorax (ribs)-expiration
  41. internal intercostals insertion: inferior border of rib above, internal surface
  42. internal intercostals origin: superior border of a rib, internal surface
  43. internal oblique action: compresses abdomen; lateral rotation
  44. internal oblique insertion: linea alba (aponeurosis of midline); costal cartilage of last three or four ribs
  45. internal oblique origin: iliac crest
  46. latissimus dorsi action: adducts and rotates humerus medially, retracts shoulder
  47. latissimus dorsi insertion: intertubercular groove of humerus
  48. latissimus dorsi origin: sacral, lumbar and lower thoracic vertebrae; iliac crest and lower ribs
  49. pectoralis major action: flexes, adducts, and rotates arm medially, pulls arm across chest
  50. pectoralis major insertion: intertubercular groove of humerus
  51. pectoralis major origin: clavicle, sternum, costal cartilages of second to sixth rib
  52. rectus abdominis action: flexes vertebral column
  53. rectus abdominis insertion: costal cartilage of fifth to seventh ribs and xiphoid process
  54. rectus abdominis origin: pubic crest and symphysis pubis
  55. serratus anterior action: pulls scapula anteriorly and downward
  56. serratus anterior insertion: scapula
  57. serratus anterior origin: upper ribs
  58. transversus abdominis action: compresses abdomen
  59. transversus abdominis insertion: linea alba, and pubic crest
  60. transversus abdominis origin: inguinal ligament, lumbar fascia, and costal cartilage of last six ribs
  61. trapezius action: rotates scapula; raises scapula; pulls scapula medially, or pulls scapula and shoulder downward
  62. trapezius insertion: clavicle, acromion and spinous process of scapula
  63. trapezius origin: occipital bone, cervical and thoracic vertebra
  64. triceps brachii action: extends the forearm
  65. triceps brachii insertion: olecranon process of ulna
  66. triceps brachii origin: scapula and humerus