Dermatomes/Myotomes Word Scramble
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Nerve Root | Dermatome | Muscles to test (Myotome) | Muscle test |
C1 | Vertex of skull | None | None |
C2 | Temple,forehead ,occiput | Longus colli, SCM, rectus capitis | Shoulder shrug |
C3 | Entire neck, posterior cheek, temporal area, prolongation forward under mandible | Trapezius, splenius capitis | Shoulder shrug |
C4 | Shoulder area, clavicular area, upper scapular area | Trapezius, levator scapulae | Shoulder shrug |
C5 | Deltoid area, anterior aspect of entire arm to base of thumb | Supraspinatus, infraspinatus, deltoid, biceps | Elbow flexion |
C6 | Anterior arm, radial side of hand to thumb and index finger | Biceps, supinator, wrist extensors | Elbow flexion; radial wrist extension |
C7 | Lateral arm and forearm to index, long, and ring fingers | Triceps, wrist flexors | Wrist flexion |
C8 | Medial arm and forearm to long, ring, and little finger | Ulnar deviation, thumb extensors, thumb adductors | Thumb extension |
T1 | Medial side of forearm to base of little finger | N/A | Abduct fifth digit |
T2 | Medial side of upper arm to medial elbow, pectoral and midscapular areas | N/A | N/A |
T3-T6 | Upper thorax | N/A | N/A |
T5-T7 | Costal margin | N/A | N/A |
T8-T12 | Abdomen and lumbar region | N/A | N/A |
L1 | Back, over trochanter and groin | None | Hip flexion |
L2 | Back, front of thigh to knee | Psoas, hip adductors | Hip flexion |
L3 | Back, upper buttock, anterior thigh and knee, medial lower leg | Psoas, quadriceps, thigh atrophy | Hip flexion; knee extension |
L4 | Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe | Tibialis anterior, extensor hallucis | Knee extension; ankle dorsiflexion |
L5 | Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes | Extensor hallucis, peroneals, gluteus medius, dorsiflexors, hamstring and calf atrophy | Ankle dorsiflexion; extend great toe; knee flexion |
S1 | Buttock, thigh and leg posterior | Calf and hamstring, wasting of gluteals, peroneals, plantar flexors | Knee flexion; ankle plantar flexion |
S2 (S1 for dermatome) | Buttocks, thigh and leg posterior (one of two popssible answers) | Calf and hamstring, wasting of gluteals, plantarflexors, not peroneals | Ankle plantar flexion |
S3 | Groin, medial thigh to knee | None | None |
S4 | Perinuem, genitals, lower sacrum | Bladder, rectum | None |
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