Myotome Muscle Weakness
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 | none
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C2 | Longus colli, sternocleidomastoid, rectus capitus
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C3 | Trapezius, splenius capitus
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C4 | Trapezius, levator scapulae
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C5 | Supraspinatus, infraspinatus, deltoid, biceps
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C6 | Biceps, supinator, wrist extensors
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C7 | Triceps, wrist flexors (rarely, wrist extensors)
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C8 | Ulnar deviators, thumb extensors, thumb adductors (rarely, triceps)
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T1 | Disk lesions @ upper 2 thoracic levels dont give rise 2 root weakness of hand intrinsic muscles r due 2 other pathology. Dural & nerve root stress has T1 elbow flex w/ arm horizontal. T1-2 scapulae ->&back on chest wall. Neck flex at any thoracic level
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T2 | Disk lesions @ upper 2 thoracic levels dont give rise 2 root weakness of hand intrinsic muscles r due 2 other pathology. Dural & nerve root stress has T1 elbow flex w/ arm horizontal. T1-2 scapulae ->&back on chest wall. Neck flex at any thoracic level
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T3-T12 | Articular & dural signs & root pain r common. Root signs (cutaneous analgesia) r rare & have such indefinate are that they have little localizing value. Weakness is not detectable
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L1 | None
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L2 | Psoas, hip adductors
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L3 | Psoas, quadriceps, thigh atrophy
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L4 | Tibialis anterior, extensor hallucis
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L5 | Extensor hallucis, peroneals, gluteus medius, DF, hamstring and calf atrophy
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S1 | Calf and hamstrings, wasting of gluteals, peroneals, PF
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S2 | Calf and hamstrings, wasting of gluteals, PF
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S3 | None
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S4 | Bladder and rectum
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Created by:
Hunter10
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