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Nerve Root Dermatomes and Myotomes based on Magee

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Nerve Root
Dermatome
Myotome
C1   Vertex of skull   None  
🗑
C2   Temple, Forehead, Occiput   Longus colli, SCM, Rectus capitis  
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C3   Neck, Posterior cheek, Temporal area, prolongation forward under mandible   Trapezius, Levator scapulae  
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C4   Shoulder area, clavicular area, Upper scapular area   Trapezius, Splenius capitis  
🗑
C5   Deltoid area, Anterior aspect of entire arm to base of thumb   Supraspinatus, Infraspinatus, Deltoid, Biceps  
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C6   Anterior arm, Radial side of hand to thumb and index finger   Biceps, Supinator, Wrist extensors  
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C7   Lateral arm and forearm to index, middle, and ring fingers   Triceps, Wrist flexors  
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C8   Medial arm and forearm to middle, ring, and pinky fingers   Ulnar deviators, thumb extensors, thumb adductors  
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T1   Medial side of forearm to base of pinky finger   No weakness noted  
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L1   Back, Over trochanter and groin   None  
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L2   Back, front of thigh to knee   Psoas, Hip adductors  
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L3   Back, Upper buttock, Anterior thigh and knee, Medial lower leg   Psoas, Quadriceps, Thigh atrophy  
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L4   Medial buttock, Lateral thigh, Medial leg, Dorsum of foot, Big Toe   Tibialis anterior, Extensor hallucis  
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L5   Buttock, Posterior and lateral thigh, Lateral aspect of leg, Dorsum of foot, Medial half of sole, First, second, third toes   Extensor hallucis, Peroneals, Gluteus medius, Dorsiflexors, Hamstring and calf atrophy  
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S1   Buttock, Thigh, and Leg posterior   Calf and hamstring, Wasting of gluteals, Peroneals, Plantar flexors  
🗑
S2   Buttock, Thigh, and Leg posterior   Calf and hamstring, Wasting of gluteals, Peroneals, Plantar flexors  
🗑


   

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Created by: noorigdi
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