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Neuro
Nerve Root Dermatomes, Myotomes, Reflexes, Paresthesias
| Nerve Root | Dermatome, myotome, reflexes |
|---|---|
| C1 (Dermatome / Myotome) | Dermatome: Vertex of skull Myotome: None |
| C2 (Dermatome / Myotome) | Dermatome: Temple, forehead, occiput Myotome: Longus colli, SCM, Rectus capitis (neck flexors) |
| C3 (Dermatome / Myotome) | Dermatome: Entire neck, posterior cheek, temporal area, prolongation forward under mandible Myotome: Traps, splenius capitis |
| C4 (Dermatome / Myotome) | Dermatome: Shoulder area, clavicular area, upper scapular area Myotome: Traps, levator scapulae |
| C5 (Dermatome / Myotome) | Dermatome: Deltoid area, anterior aspect of entire arm to base of thumb Myotome: Supraspinatus, infraspinatus, deltoid, biceps |
| C6 (Dermatome / Myotome) | Dermatome: Lateral anterior arm, radial side of hand to thumb and index finger Myotome: Biceps, supinator, wrist extensors |
| C7 (Dermatome / Myotome) | Dermatome: Lateral arm and forearm to index, long, and ring fingers Myotome: Triceps, wrist flexors |
| C8 (Dermatome / Myotome) | Dermatome: Medial arm and forearm to long, ring, and little fingers Myotome: Ulnar deviators, thumb extensors, thumb adductors |
| T1 (Dermatome / Myotome) | Dermatome: Medial side of forearm to base of little finger Myotome: Disk lesions at upper 2 thoracic levels do not appear to give rise to root weakness |
| T2 (Dermatome / Myotome) | Dermatome: Medial side of upper arm to medial elbow, pectoral and mid scapular areas Myotome: Disk lesions at upper 2 thoracic levels do not appear to give rise to root weakness |
| L1 (Dermatome / Myotome) | Dermatome: back, over trochanter and groin Myotome: None |
| L2 (Dermatome / Myotome) | Dermatome: Back, front of thigh to knee Myotome: Psoas, hip adductors |
| L3 (Dermatome / Myotome) | Dermatome: back, upper buttock, anterior thigh and knee, medial lower leg Myotome: Psoas, quads, thigh atrophy |
| L4 (Dermatome / Myotome) | Dermatome: Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe Myotome: Tibialis anterior, extensor hallucis |
| L5 (Dermatome / Myotome) | Dermatome: Butt, post. and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, 1st, 2nd, and 3rd toes Myotome: Extensor hallucis, peroneals, glut medius, DFs, hamstrings and calf atrophy |
| S1 (Dermatome / Myotome) | Dermatome: Lateral and plantar aspect of foot Myotome: Calf and hamstrings, wasting of glutes, peroneals, plantar flexors |
| S2 (Dermatome / Myotome) | Dermatome: Butt, thigh, and leg posterior Myotome: Same as S1 except peroneals |
| S3 (Dermatome / Myotome) | Dermatome: Groin, medial thigh to knee Myotome: None |
| S4 (Dermatome / Myotome) | Dermatome: Perineum, genitals, lower sacrum Myotome: Bladder, rectum |
| C1 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: None |
| C2 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: None |
| C3 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: Cheek, side of neck |
| C4 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: Horizontal band along clavicle and upper scapula |
| C5 (Reflexes affected, Paresthesias) | Reflexes affected: Biceps, brachioradialis Paresthesias: None |
| C6 (Reflexes affected, Paresthesias) | Reflexes affected: Biceps, brachioradialis Paresthesias: Thumb and index finger |
| C7 (Reflexes affected, Paresthesias) | Reflexes affected: Triceps Paresthesias: Index, long, and ring fingers (together) |
| C8 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: Little finger alone or w/ 2 adjacent fingers; not ring or long fingers, alone or together (C7) |
| L1 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: Groin; after holding posture which causes pain |
| L2 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: Occasionally anterior thigh |
| L3 (Reflexes affected, Paresthesias) | Reflexes affected: Knee jerk sluggish, PKB (+), pain on full SLR Paresthesias: Medial knee, anterior lower leg |
| L4 (Reflexes affected, Paresthesias) | Reflexes affected: SLR limited, neck flexion pn, weak or absent knee jerk, side flexion limited Paresthesias: Medial aspect of calf and ankle |
| L5 (Reflexes affected, Paresthesias) | Reflexes affected: SLR limited 1 side, neck flexion pnful, ankle decreased, crossed-leg raising pn Paresthesias: Lateral aspect of leg, medial 3 toes |
| S1 (Reflexes affected, Paresthesias) | Reflexes affected: SLR limited, Achilles reflex weak or absent Paresthesias: Lateral 2 toes, lateral foot, lateral leg to knee, plantar aspect of foot |
| S2 (Reflexes affected, Paresthesias) | Reflexes affected: Same as S1 Paresthesias: Lateral leg, knee, and heel |
| S3 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: None |
| S4 (Reflexes affected, Paresthesias) | Reflexes affected: None Paresthesias: Saddle area, genitals, anus, impotence, massive posterior herniation |
Created by:
glopez111
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