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Neuromuscular
Myotome (muscle weakness)
| Nerve Root | Muscle weakness |
|---|---|
| C1 | None |
| C2 | Longus colli, SCM, Rectus capitis |
| C3 | Traps, Splenius capitis |
| C4 | Traps, Levator scapulae |
| C5 | Supraspinatus, Infraspinatus, Deltoid, Biceps |
| C6 | Biceps, Supinator, Wrist extensors |
| C7 | Triceps, Wrist flexors (rarely, wrist extensors) |
| C8 | Ulnar deviators, Thumb extensors, Thumb adductors (rarely, triceps) |
| T1-T2 | Disk lesions at upper 2 thoracic levels do not appear to give rise to root weakness. |
| T3-T12 | Articular and dural signs and root pn are common. Root signs (cutaneous analgesia) are rare and have such indefinite area that they have little localizing value. Weakness is not detectable. |
| L1 | None |
| L2 | Psoas, Hip adductors |
| L3 | Psoas, Quads, thigh atrophy |
| L4 | Tibialis anterior, Extensor hallucis |
| L5 | Extensor hallucis, Peroneals, Gluteus medius, Dorsiflexors, Hamstrings and calf atrophy |
| S1 | Calf and hamstrings, wasting of gluteals, peroneals, plantar flexors |
| S2 | Same as S1 except peroneals |
| S3 | None |
| S4 | Bladder, rectum |
Created by:
glopez111
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