Muscle innervations and plexuses

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SeanOHair
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153055
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Muscle innervations and plexuses
Updated:
2012-05-10 01:54:12
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ANAT 150 Crafton Hills College
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A list of muscles and their innervations plus a breakdown of the nerve plexuses
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  1. Teres Minor
    Axillary nerve
  2. Deltoid
    Axillary nerve
  3. Triceps Brachii
    Radial nerve
  4. Anconeus
    Radial nerve
  5. Brachioradialis
    Radial nerve
  6. Extensor Carpi Radialis Longus
    Radial nerve
  7. Extensor Carpi Radialis Brevis
    Radial nerve
  8. Supinator
    Radial nerve
  9. Extensor Digitorum
    Radial nerve
  10. Extensor Digiti Minimi
    Radial nerve
  11. Extensor Indicis
    Radial nerve
  12. Extensor Carpi Ulnaris
    Radial nerve
  13. Abductor Pollicis Longus
    Radial nerve
  14. Extensor Pollicis Longus
    Radial nerve
  15. Extensor Pollicis Brevis
    Radial nerve
  16. Biceps Brachii
    Musculocutaneous nerve
  17. Coracobrachialis
    Musculocutaneous nerve
  18. Brachialis
    Musculocutaneous nerve
  19. Pronator Teres
    Median nerve
  20. Pronator Quadratus
    Median nerve
  21. Flexor Carpi Radialis
    Median nerve
  22. Palmaris Longus
    Median nerve
  23. Flexor Digitorum Superficialis
    Median nerve
  24. Flexor Pollicis Longus
    Median nerve
  25. Abductor Pollicis Brevis
    Median nerve
  26. Opponens Pollicis
    Median nerve
  27. Flexor Pollicis Brevis
    Median nerve
  28. Lateral Lumbricals
    Median nerve
  29. Flexor Carpi Ulnaris
    Ulnar nerve
  30. Flexor Digitorum Profundus
    Ulnar nerve
  31. Adductor Pollicis
    Ulnar nerve
  32. Flexor Digiti Minimi Brevis
    Ulnar nerve
  33. Abductor Digiti Minimi
    Ulnar nerve
  34. Opponens Digiti Minimi
    Ulnar nerve
  35. Obturator Externus
    Obturator nerve
  36. Adductor Magnus (adductor portion)
    Obturator nerve
  37. Adductor Longus
    Obturator nerve
  38. Adductor Brevis
    Obturator nerve
  39. Gracilis
    Obturator nerve
  40. Psoas Major
    Femoral nerve
  41. Iliacus
    Femoral nerve
  42. Pectineus
    Femoral nerve
  43. Sartorius
    Femoral nerve
  44. Vastus Lateralus
    Femoral nerve
  45. Vastus Intermedius
    Femoral nerve
  46. Vastus Medialis
    Femoral nerve
  47. Rectus Femoris
    Femoral nerve
  48. Biceps Femoris
    Tibial nerve
  49. Semitendinosus
    Tibial nerve
  50. Semimembranosus
    Tibial nerve
  51. Adductor Magnus (hamstring portion)
    Tibial nerve
  52. Plantaris
    Tibial nerve
  53. Gastrocnemius
    Tibial nerve
  54. Soleus
    Tibial nerve
  55. Tibialis Posterior
    Tibial nerve
  56. Popliteus
    Tibial nerve
  57. Flexor Digitorum Longus
    Tibial nerve
  58. Flexor Hallucis Longus
    Tibial nerve
  59. Tibialis Anterior
    Common Fibular (Peroneal) nerve
  60. Fibularis Tertius
    Common Fibular (Peroneal) nerve
  61. Extensor Digitorum Longus
    Common Fibular (Peroneal) nerve
  62. Extensor Hallucis Longus
    Common Fibular (Peroneal) nerve
  63. Extensor Digitorum Brevis
    Common Fibular (Peroneal) nerve
  64. Fibularis Longus
    Common Fibular (Peroneal) nerve
  65. Fibularis Brevis
    Common Fibular (Peroneal) nerve
  66. The cervical plexus is derived from what spinal roots?
    C1 - C4
  67. What nerve is a loop between C1,C2, and C3 and is the only spinal nerve loop?
    Ansa Cervicalis
  68. What nerve is derived from C3, C4, and C5 (part of the brachial plexus) and what muscle does it innervate?
    The Phrenic nerve; the Diaphragm
  69. The cervical plexus innervates what portion of the head?
    • The posterior portion (back from about the ears)
    • Skin and superficial structures of the neck
  70. What innervates (sensory) the part of the head the cervical plexus does not?
    CN V (Trigeminal)
  71. How many roots are in the Cervical Plexus?
    4 (C1- C4)
  72. How many trunks are in the cervical plexus?
    None (the roots give rise directly to branches)
  73. The brachial plexus is derived from what spinal roots?
    C5, C6, C7, C8, and T1
  74. How many roots are in the brachial plexus?
    5 (C5 - T1)
  75. How many trunks are in the brachial plexus?
    3 (Upper, Middle, Lower)
  76. How many anterior divisions are in the brachial plexus?
    3
  77. How many posterior divisions are in the brachial plexus?
    3
  78. How many cords are in the brachial plexus and how are they formed?
    • 3 cords
    • The Posterior cord is formed by the junction of all 3 posterior divisions
    • The Lateral cord is formed by the junction of the upper and middle anterior divisions
    • The Medial cord is formed from the lower anterior division
  79. In the brachial plexus, what nerve(s) rise from the posterior cord?
    • Axillary
    • Radial
  80. In the brachial plexus, what nerve(s) rise from the lateral cord?
    • Musculocutaneous
    • Median (half comes from here, half from the medial cord)
  81. In the brachial plexus, what nerve(s) rise from the medial cord?
    • Ulnar
    • Median (half comes from here, half from the lateral cord)
  82. In the brachial plexus, there is a major nerve that rises from 2 cords. It is the only major nerve that does this. Name the nerve and the 2 cords it rises from.
    The Median nerve rises from the lateral and medial cords
  83. What nerve arises from the roots of C5, C6, and C7?
    The long thoracic nerve
  84. What does the long thoracic nerve innervate and what does paralysis of this nerve cause?
    The Serratus Anterior muscle; paralysis causes 'winging' of the scapula
  85. How many roots are in the lumbosacral plexus?
    9 (L1 - S4)
  86. The sciatic nerve is the combination of what two nerves?
    • Common Fibular (or Peroneal)
    • Tibial
  87. Roots L4 - S3 give rise to what two major nerves?
    Common Fibular and Tibial
  88. If the common fibular and the tibial nerves arise from the same roots, what makes them different?
    The Common Fibular arises from the anterior divisions and the Tibial arises from the posterior divisions
  89. Roots L2 - L4 give rise to what two major nerves?
    • Obturator
    • Femoral
  90. If the obturator and femoral nerves arise from the same roots, what makes them different?
    The Obturator nerve arises from the posterior divisions and the Femoral nerve arises from the anterior divisions
  91. T/F: The sciatic nerve is a combination of the peroneal nerve and the common fibular nerve.
    False, the sciatic nerve is a combination of the tibial nerve and the common fibular nerve (peroneal = common fibular)
  92. T/F: The obturator nerve and the tibial nerve both arise from the anterior divisions but from different roots.
    False, the Obturator nerve and the Tibial nerve both arise from the posterior divisions but from different roots.
  93. T/F: The femoral and obturator nerves arise from the same roots in the lumbosacal plexus.
    True
  94. T/F: Scapular winging is caused by paralysis of a nerve arising from C4, C5, C6, and C7 called the long thoracic nerve.
    False, C4 is not a root of this nerve
  95. Why are the thoracic nerve roots not involved in plexuses?

    a. They innervate the viscera of the thorax
    b. They form the intercostal nerves
    c. They directly innervate muscles of the back
    d. They form the ganglia of the sympathetic nervous system
    e. They form the ganglia of the parasympathetic nervous system
    B and D
  96. If I lose feeling in the skin along my jawline, then I know there is a problem with:

    a. CN VIII
    b. Brachial plexus (mandibular nerve)
    c. CN V1
    d. CN V2
    e. CN V3
    E
  97. T/F: Roots of the cervical plexus give rise directly to branches (no trunks, divisions, or cords).
    True
  98. T/F: Roots of the lumbosacral plexus give rise directly to branches (no trunks, divisions, or cords).
    False, there are anterior and posterior divisions in the lumbosacral plexus, but no trunks or cords
  99. T/F: Trunks and cords are only found in the brachial plexus.
    True
  100. T/F: Unlike the ulnar and musculocutaneous nerves, the median nerve arises from all three cords in the brachial plexus, not just one or two.
    False

    • The median nerve arises from the lateral and medial cords (the anterior division).
    • The ulnar arises only from the medial cord.
    • The musculocutaneous arises from the lateral cord.
    • The radial and axillary nerves rise from the posterior cord.

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