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Skin surfaces and Muscles weakness

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
Muscles to test (Myotome)
Muscle test
C1   Vertex of skull   None   None  
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C2   Temple,forehead ,occiput   Longus colli, SCM, rectus capitis   Shoulder shrug  
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C3   Entire neck, posterior cheek, temporal area, prolongation forward under mandible   Trapezius, splenius capitis   Shoulder shrug  
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C4   Shoulder area, clavicular area, upper scapular area   Trapezius, levator scapulae   Shoulder shrug  
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C5   Deltoid area, anterior aspect of entire arm to base of thumb   Supraspinatus, infraspinatus, deltoid, biceps   Elbow flexion  
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C6   Anterior arm, radial side of hand to thumb and index finger   Biceps, supinator, wrist extensors   Elbow flexion; radial wrist extension  
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C7   Lateral arm and forearm to index, long, and ring fingers   Triceps, wrist flexors   Wrist flexion  
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C8   Medial arm and forearm to long, ring, and little finger   Ulnar deviation, thumb extensors, thumb adductors   Thumb extension  
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T1   Medial side of forearm to base of little finger   N/A   Abduct fifth digit  
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T2   Medial side of upper arm to medial elbow, pectoral and midscapular areas   N/A   N/A  
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T3-T6   Upper thorax   N/A   N/A  
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T5-T7   Costal margin   N/A   N/A  
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T8-T12   Abdomen and lumbar region   N/A   N/A  
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L1   Back, over trochanter and groin   None   Hip flexion  
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L2   Back, front of thigh to knee   Psoas, hip adductors   Hip flexion  
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L3   Back, upper buttock, anterior thigh and knee, medial lower leg   Psoas, quadriceps, thigh atrophy   Hip flexion; knee extension  
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L4   Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe   Tibialis anterior, extensor hallucis   Knee extension; ankle dorsiflexion  
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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  
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S1   Buttock, thigh and leg posterior   Calf and hamstring, wasting of gluteals, peroneals, plantar flexors   Knee flexion; ankle plantar flexion  
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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  
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S3   Groin, medial thigh to knee   None   None  
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S4   Perinuem, genitals, lower sacrum   Bladder, rectum   None  
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