Nerve segments, innervations, distributions, MMT's
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Median Nerve | C6, C7, C8, T1 | Pronators, wrist and finger flexors on radial side, most thumb muscles | Palmar aspects of thumb, second, third, and fourth, (radial half) fingers | Loss of forearm pronation, thumb opposition, flexion, and abduction
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| Ulnar Nerve | C7, C8, T1 | FCU, FDP (medial half), interossei, 4th and 5th lumbricals | Fourth finger (medial portion), 5th finger | Loss of wrist ulnar deviation, weakened wrist and finger flexion, weakened 4th and 5th finger flexion, loss of thumb adduction, loss of most intrinsics (claw hand)
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| Sciatic Nerve | L4, L5, S1, S2, S3 (high muscles) | Hamstrings, Adductor Magnus | Through its terminal branches of the tibia, superficial fibular, and deep fibular nerves | Loss of knee flexion, weak hip adduction, and loss of all muscle function below the knee
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| Femoral Nerve | L2, L3, L4 | Sartorius, Quadriceps, Iliacus, Pectineus | Middle anterior thigh and medial thigh proximal to the knee | Loss of hip flexion and knee extension
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| Tibial Nerve | L4, L5, S1, S2, S3 (lower muscles) | Gastrocnemius, Soleus, Plantaris, Popliteus, Tibilais Posterior | Posterior/lateral calf, ankle, and heel | Loss of plantar flexion and supination
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| Superficial Fibular (Peroneal) Nerve | L5, S1, S2 | Fibularis longus and brevis | Anterior/lateral distal lower leg and ankle and most of the dorsum of the foot | Loss of eversion
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| Deep Fibular (Peroneal) Nerve | L4, L5, S1, S2 | Tibialis anterior, EHL, EDL, Fibularis tertius, 1st & 2nd dorsal interossei, EDB, EHB | Web space between the 1st and 2nd toes on the dorsum of the foot | Loss of dorsiflexion (drop foot) and weakness in the foot intrinsics
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| Musculocutaneous Nerve | C5, C6 (further down | Coracobrachialis, Biceps Brachii, Brachialis | Anterolateral surface of forearm | loss of forearm flexion when supinated, weakened supination
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| Axillary Nerve | C5, C6 (further up) | Deltoid, Teres Minor | Lateral arm over lower portion of deltoid | Loss of shoulder abduction, weakened external rotation
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| Radial Nerve | C5, C6, C7, C8, T1 | Triceps, Anconeous, Brachioradialis, Supinator, Wrist, fingers, and thumb extensors | Posterior arm, posterior forearm, and radial side of posterior hand | Loss of elbow, wrist, finger, and thumb extension
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Created by:
jvlassov
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