Nerve Roots/Dermatomes/Myotomes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| C1 | Dermatome: Vertex of skull
Myotmome: None
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| C2 | Dermatome: Temple, forehead, occiput
Myotome: Longus colli, sternocleidomastoid, rectus capitis
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| C3 | Dermatome: Entire neck, posterior cheek, temporal area, prolongation forward under mandible.
Myotome: Trapezius, spenius capitis
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| C4 | Dermatome: Shoulder area, clavicular area, upper scapular area
Myotome: Trapezius, levator sacpulae
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| C5 | Dermatome: Deltoid area, anterior aspect of entire arm to base of thumb
Myotome: Supraspinatus, infraspinatus, deltoid, biceps
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| C6 | Dermatome: Anterior arm, radial side of hand to thumb and index finger
Myotome: Biceps, supinator, wrist extensors
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| C7 | Dermatome: Lateral arm and forearm to index, long, and ring finger
Myotome: Triceps, wrist flexors (rarely wrist extensors)
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| C8 | Dermatome: Medial arm and forearm to long, ring, and little fingers
Myotome: Ulnar deviators, thumb extensors, thumb adductors (rarely triceps)
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| T1 | Dermatome: Medial side of forearm to base of little finger
Myotome: No root weakness present
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| T2 | Dermatome: Medial side of upper arm to medial elbow, pectoral and midscapular areas
Myomtome: No root weakness noted
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| T3-12 | Dermatome: T3-6 upper thorax T5-7 costal margin T8-12 abdomen and lumbar region
Myotome: Weakness not detectable
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| L1 | Dermatome: Back, over trochanter and groin
Myotome: none
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| L2 | Dermatome: Back, front of thigh to knee
Myotome: Psoas, hip adductors
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| L3 | Dermatome: Back, upper buttock, anterior thigh and knee, medial lower leg
Myotome: Psoas, quadriceps, thigh atrophy
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| L4 | Dermatome: Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe
Myotome: Tibilais anterior, extensor hallucis
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| L5 | Dermatome: Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes
Myotome: Extensor halucis, peroneals, gluteus medius, dorsiflexors, hamstrings, and calf atrophy
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| S1 | Dermatome: Lateral and plantar aspect of foot
Myotome: Calf and hamstrings, wasting of gluteals, peroneals, plantar flexors
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| S2 | Dermatome: Buttock, thigh, and leg posterior
Myotome: Calf and hamstrings, wasting of gluteals, plantar flexors
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| S3 | Dermatome: Groin medial thigh to knee
Myotome: None
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| S4 | Dermatome: Perineum, genitals, lower sacrum
Myotome: Bladder, rectum
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
smit4163
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