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Neuro.

Key Dermatomes

QuestionDermatomeMyotomeReflexes
C2 occipital protuberance Neck muscles -
C5 clavicles Supra, Infra, Delt, Biceps Biceps, Brachioradialis
C6 thumb Biceps, Supinator, Wrist extensors Biceps, Brachioradialis
C7 middle finger Wrist flexors, Triceps Triceps
C8 pinky Thumb extensors & adductors, ulnar deviators Triceps
T1 medial side antecubital fossa - -
T2 apex of axilla - -
T4 nipples - -
T6 xiphisternum - -
T10 umbilicus - -
T12 groin - -
L2 mid-anterior thigh Psoas, Hip adductors -
L3 medial femoral condyle (knee) Psoas, Quad. pain with SLR
L4 medial malleolus Tibialis Anterior, Extensor Hallucis knee flexion (HS)
L5 dorsum of foot @ 3rd MTP Extensor Hallucis, peroneals, Glut. med, DF's, hamstring & calf knee jerk/ knee ext
S1 lateral heel Calf & hamstring, gluts, peroneals, PF's limited SLR, Achilles reflex weak or absent
S2 popliteal fossa same as S1 except peroneals (calf, hamstring, PF's) limited SLR, Achilles reflex weak or absent
S4-5 perianal bladder, rectum -
Created by: s1234