Dermatomes, Myotomes

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Dermatomes, Myotomes
2010-07-04 21:16:48
nerve root dermatomes myotomes

nerve roots dermatomes and myotomes on specific nerves roots.
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  1. dermatome- C1
    vertex of skull
  2. dermatome- C2
    temple, forehead, occiput
  3. dermatome- C3
    entire neck, posterior cheek, temporal area, prolongation forward under mandible
  4. dermatome- C4
    shoulder area, clavicular area, upper scapular area
  5. dermatome- C5
    deltoid area, anterior aspect of entire arm to base of thumb
  6. dermatome- C6
    Anterior arm, radial side of hand to thumb and index finger
  7. dermatome- C7
    Lateral arm and forearm to index, long, and ring finger
  8. dermatome- C8
    medial arm and forearm to index, long, and ring fingers
  9. dermatome-T1
    medial side of forearm to base of little finger
  10. dermatome- T2
    medial side od upper arm to medial elbow, pectoral and midscapular areas
  11. dermatome- T3-T12
    • T3-T6 upper thorax
    • T5-T7 costal margin
    • T8-T12 abdomen and lumbar region
  12. dermatome- L1
    back, over trochanter and groin
  13. dermatome- L2
    back, front of thigh to knee
  14. dermatome- L3
    back, upper buttock, anterior thigh and knee, medial lower leg
  15. dermatome- L4
    Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe
  16. myotome- C1
  17. myotome- C2
    longus colli, sternocleidomastoid, rectus capitis
  18. myotome- C3
    Trapezius, splenius capitis
  19. myotome- C4
    Trapezius, levator scapulae
  20. myotome- C5
    supraspinatus, infraspinatus, deltoid, biceps
  21. myotome- C6
    biceps, supinator, wrist extensors
  22. myotome-C7
    triceps, wrist flexor
  23. myotome- C8
    Ulnar deviators, thumb extensors, thumb adductors
  24. myotome- T1-T2
    disk lesions at upper two thoracic levels and intrinsic muscles
  25. myotome- T3-T12
    weakness not detectable
  26. myotome- L1
  27. myotome- L2
    psoas, hip adductors
  28. myotome- L3
    psoas, quadricps, thigh atrophy
  29. myotome- L4
    Tibialis anterior, extensor hallucis
  30. dermatome- L5
    buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes
  31. dermatome- S1
    buttock, thigh, and leg posterior
  32. dermatome- S2
    buttock, thigh, and leg posterior
  33. dermatome- S3
    groin, medial thigh to knee
  34. dermatome- S4
    perineum, genitals, lower sacrum
  35. myotome- L5
    extensor hallucis, peroneals, gluteus medius, dorsiflexors, hamstring and calf atrophy
  36. myotome- S1
    calf and hamstrings, wasting of gluteals, peroneals, plantar flexors
  37. myotome- S2
    calf and hamstrings, wasting of gluteals, plantar flexors
  38. myotome- S3
  39. myotome- S4
    bladder, rectum