Exam 1: Second Order -Back/Chest

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brau2308
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157956
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Exam 1: Second Order -Back/Chest
Updated:
2012-06-12 17:29:23
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anatomy muscles origin action invervation insertion
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review of second order for anatomy exam 1
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  1. Trapezius
    Origin:
    external occipital protuberance and superior nuchal line, ligamentum nuchae and spinous process of C7-T12
  2. Trapezius
    Insertion:
    distal third of clavicle, acromion and spine of scapula
  3. Trapezius
    Action: as a whole
    retracts scapula
  4. Trapezius
    Action: Superior fibers-
    pull lateral angle upward
  5. Trapezius
    Action: Inferior fibers-
    pull base of spine downward, rotating glenoid cavity upward (abduction of arm)
  6. Trapezius
    Action: Middle fibers-
    upward rotation and prevents sagging of lateral angle (glenoid cavity) of scapula
  7. Trapezius
    Innervation:
    CN XI --spinal accessory N (joined by motor branches from C3-4
  8. Latissimus dorsi
    Origin:
    spinous processes of T7-S1; posterior part of iliac crest, ribs 9-12 by muscular slips (shared with external abdominal origin)
  9. Latissimus dorsi
    Insertion:
    crest of lesser tubercle of humerus
  10. Latissimus dorsi
    Action:
    combined movements of adduction, medial rotation and extension of arm, inferior fibers prevent upward displacement of shoulder during these movements
  11. Latissimus dorsi
    Innervation:
    thoracodorsal N
  12. Rhomboideus major
    Origin:
    spinous processes of T2-5
  13. Rhomboideus major
    Insertion:
    medial border of scapula inferior to base of spine
  14. Rhomboideus major
    Action:
    elevates medial border and retracts scapula to midline
  15. Rhomboideus major
    Innervation:
    dorsal scapular N
  16. Rhomboideus minor
    Origin:
    lower part of ligamentum nuchae, spinous processes of C7-T1
  17. Rhomboideus minor
    Insertion:
    medial border of scapula at base of spine
  18. Rhomboideus minor
    Action:
    elevates medial border and retracts scapula to midline
  19. Rhomboideus minor
    Innervation
    dorsal scapular N (C5)
  20. Levator scapulae
    Origin:
    posterior tubercles of transverse processes of C1-3(4)
  21. Levator scapulae
    Insertion:
    superior angle and medial border of scapula as far as the base of spine
  22. Levator scapulae
    Action:
    elevates medial angle of scapula
  23. Levator scapulae
    Innervation:
    dorsal scapular N
  24. Serratus posterior superior
    Origin:
    nuchal ligament and spinous procsses of C7-T2 vertebra
  25. Serratus posterior superior
    Insertion:
    superior border of 2nd-4th ribs
  26. Serratus posterior superior
    Action:
    accessory respiratory muscle, elevates upper ribs; proprioception
  27. Serratus posterior superior
    Innervation:
    2nd-5th intercostal NN
  28. Serratus posterior inferior
    Origin:
    spinous processes of T11-L2 vertebra
  29. Serratus posterior inferior
    Insertion:
    inferior borders of 8th-12th ribs near their angles
  30. Serratus posterior inferior
    Action:
    accessory respiratory muscle depresses lower ribs; proprioception
  31. Serratus posterior inferior
    Innervaiton:
    anterior rami to T9-T12 thoracic spinal NN
  32. Splenius
    Origin:
    nuchal ligament and spinous processes of C7-T3/4 vertebra
  33. Splenius capitis
    Insertion:
    mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone
  34. Splenius cervicis
    Insertion:
    tubercles of transverse processes of C1-C3/4 vertebra
  35. Splenius
    Action if one contracts:
    head moves back (dorsally) and face turns to same side, laterally flexes neck and rotates head to side of active muscles
  36. Splenius
    Action if both contract:
    extends neck and head
  37. Splenius
    Innervation:
    posterior rami of spinal NN
  38. Iliocostalis
    Origin:
    sacrum, iliac crests, and lumbar vertebra; sacroiliac and supraspinous ligaments
  39. Iliocostalis
    Insertion:
    ribs and C4-6 vertebra
  40. Iliocostalis
    Bilateral Action:
    extend vertebral column and head; control movement va eccentric contraction
  41. Iliocostalis
    Unilateral Action:
    laterally flex vertebral column
  42. Iliocostalis
    Innervation:
    dorsal primary rami of nearest spinal NN
  43. Longissimus
    Origin:
    sacrum, iliac crests, and lumbar vertebrae; sacroiliac and supraspinous ligament
  44. Longissimus
    Insertion:
    ribs, cervical vertebrae (transverse processes) and mastoid process of skull
  45. Longissimus
    Bilateral Action:
    extend vertebral column and head; as back is flexed, control movement via eccentric contraction
  46. Longissimus
    Unilateral Action:
    laterally flex vertebral column
  47. Longissimus
    Innervation:
    dorsal primary rami of nearest spinal NN
  48. Spinalis
    Origin:
    sacrum, iliac crests, and lumbar vertebrae; sacroiliac and supraspinous ligament
  49. Spinalis
    Insertion:
    spinous processes in the upper thoracic region and to cranium
  50. Spinalis
    Bilateral Action:
    extend vertebral column and head; as back is flexed, control movement via eccentric contraction
  51. Spinalis
    Unilateral Action:
    laterally flex vertebral column
  52. Spinalis
    Innervation:
    dorsal primary rami of nearest spinal NN
  53. Semispinalis
    Origin:
    transverse processes of C4-T12
  54. Semispinalis
    Insertion:
    occipital bone and spinous processes in thoracic and cervical regions, spanning 4-6 segments
  55. Semispinalis
    Action:
    extends head and thoracic and cervical regions of vertebral column, rotate and laterally bend the spine
  56. Semispinalis
    Innervation:
    dorsal primary rami of nearest spinal NN
  57. Multifidus
    Origin:
    posterior sacrum, posterior superior iliac spine of ilium, aponeurosis of erector spinae, sacroiliac ligaments, mammillary processes of lumbar vertebrae, transverse processes of T1-T3, articular processes of C4-C7
  58. Multifidus
    Insertion:
    thickest in lumbar region; spinous processes, located 2-4 segments superior to proximal attachment
  59. Multifidus
    Action:
    rotate and laterally bend the spine; in lumbar region extends the spine to maintain the lumbar lordosis; stabilizes vertebrae during local movements of vertebral column
  60. Multifidus
    Innervation:
    dorsal primary rami of nearest spinal NN
  61. Rotatores
    Origin:
    transverse processes; best developed in thoracic region
  62. Rotatores
    Insertion:
    junction of lamina and transverse process or spinous processes of vertebra immediately or 2 segments superior to vertebra of attachment
  63. Rotatores
    Action:
    rotate and laterally bend the spine; rotate spine to one side or another; stabilize vertebrae and assist with local extension and rotator movements of vertebral column; proprioception
  64. Rotatores
    Innervation:
    dorsal primary rami of nearest spinal NN
  65. Platysma
    Origin:
    mandible
  66. Platysma
    Insertion:
    upper thorax, just infeior to clavicle
  67. Platysma
    Action:
    facial expression
  68. Platysma
    Innervation:
    CN-VII, Facial N
  69. Pectoralis Major
    Origin:
    medial half of clavicle; manubrium and body of sternum; costal cartilages 1-6
  70. Pectoralis Major
    Insertion:
    crest of greater tubercle of humerus
  71. Pectoralis Major
    Action:
    adduct and medially rotate humerus
  72. Pectralis Major
    Innervation:
    lacteral pectoral N (upper portion); medial pectoral N (lower portion)
  73. Pectoralis Minor
    Origin:
    ribs 2-5 or 3-6
  74. Pectoralis Minor
    Insertion:
    coracoid process of scapula
  75. Pectoralis Minor
    Action:
    depresses and downwardly rotates scapula
  76. Pectoralis Minor
    Innervation:
    medial pectoral N
  77. Serratus anterior
    Origin:
    lateral surfaces of ribs 1-9
  78. Serratus anterior
    Insertion:
    medial border of scapula, anterior to rhomboidei mm.
  79. Serratus anterior
    Action:
    protracts (draws forward) scapula holding medial border firmly against thoracic wall, upwardly rotates scapula when inferior angle moves faster than medial border; lifts lateral angle of scapula
  80. Serratus anterior
    Innervation:
    long thoracic N (C5-7)
  81. Deltoid
    Origin:
    lateral third of clavicle, acromion and spine of scapula
  82. Deltoid
    Insertion:
    deltoid tubersosity of body of humerus
  83. Deltoid
    Anterior fibers Action:
    flex and medially rotate arm
  84. Deltoid
    Middle fibers Action:
    abduct arm
  85. Deltoid
    Posterior fibers Action:
    extend and lateally rotate arm
  86. Deltoid
    Innervation:
    Axillary N (C5-6)
  87. Supraspinatus
    Origin:
    supraspinatus fossa and fascia
  88. Supraspinatus
    Insertion:
    uppermost of the three facets of the greater tubercle of the humerus
  89. Supraspinatus
    Action:
    abduction of arm; with arm by side, supports arm against downward pull
  90. Supraspinatus
    Innervation:
    suprascapular N (C5-6)
  91. Infraspinatus
    Origin:
    infraspinatus fossa and fascia
  92. Infraspinatus
    Insertion:
    middle facet on the greater tubercle of the humerus
  93. Infraspinatus
    Action:
    lateral rotation of arm
  94. Infraspinatus
    Innervation:
    suprascapular N
  95. Teres minor
    Origin:
    middle half of lateral border of scapula
  96. Teres minor
    Insertion:
    lowest facet of the greater tubercle of the humerus
  97. Teres minor
    Action:
    lateral rotation and weak adduction of arm
  98. Teres minor
    Innervation:
    axillary N
  99. Teres major
    Origin:
    lower third of lateral border of scapula
  100. Teres major
    Insertion:
    crest of the lesser tubercle of the humerus
  101. Teres major
    Action:
    adduction, medial rotation and extension of arm
  102. Teres major
    Innervation:
    lower subscapular N (C5-6)
  103. Subscapularis
    Origin:
    costal surface of scapula
  104. Subscapularis
    Insertion:
    lesser tubercle of humerus and its crest
  105. Subscapularis
    Action:
    medial rotation of arm
  106. Subscapularis
    Innervation:
    upper and lower subscapular NN

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