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Dermatome & Myotomes

a review of the dermatomes & mytomes

C1 D: Vertex of Skull M: None T: Neck flexion
C2 D: Temple, forehead, occiput M: Longus colli, SCM, rectus capitis T: Neck flexion
C3 D: Entire neck, posterior cheek, temporal area, prolongaton forward under mandible M: Trapezius, spelnius capitis T: Neck side flexion
C4 D: Shoulder area, clavicular area, upper scapular area M: Trapezius, levator scapulae T: Shoulder shrug
C5 D: Deltoid area, anterior aspect or entire arm to base of thumb M: Supraspinatus, infraspinatus, deltoid biceps T: Shoulder shrug
C6 D: Anterior arm, radial side of hand to thumb & index finger M: Biceps, supinator, wrist extensors T: Elbow flexion; wrist extension
C7 D: Lateral arm and forearm to index, long and ring finger M: Triceps & wrist flexors T: Elbow extension; Wrist flexion
C8 D: Medial arm and forearm to long, ring and little finger M: Ulnar deviation, thumb extensors, thumb adductors T: Thumb extension
T1 D: Medial side of forearm to base of little finger M: N/A T: Finger AB/ADD, flexion
T2 D: Medial side of upper arm to medial elbow, pectoral and midscapular areas M: N/A T: N/A
T3-6 D: Upper thorax M: N/A T: N/A
T5-7 D: Costal margin M: N/A T: N/A
T8-12 D: Abdomen and lumbar region M: N/A T: N/A
L1 D: Back, over trochanter and groin M: none T: Hip flexion
L2 D: Back, front of thigh to knee M: Psoas, hip adductors T: Hip flexion
L3 D: Back, upper buttock, anterior thigh and knee, medial lower leg M: Posas, quadriceps T: Knee extension
L4 D: Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe M: Tibialis anterior, extensor hallus T: Ankle dorsiflexion
L5 D: Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of solr, 1st, 2nd, 3rd toes M: Extensor hallucis, peroneals, gluteus medius, dorsiflexros, hamstring T: Great toe extension
S1 D: Buttock, thigh & posterior leg M: Calf, hamstring T: Ankle plantar flexion
S2 D: Buttock, thigh & posterior leg M: Calf, hamstring T: Knee flexion
S3 D: Groin, medial thigh to knee M: None T: Foot intrinsics
S4 D: Perinuem, gentials, lower sacrum M: Bladder, rectum T: None
Created by: hsomers13