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Key Dermatomes

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

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   -  


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Created by: s1234