Action | Muscles | Nerves | Nerve Roots |
---|---|---|---|
Finger extension | Extensor digitorum, Extensor indicis, Extensor digiti minimi | Radial nerve (posterior interosseous nerve) | C7, C8 |
Thumb abduction in plane of palm | Abductor pollicis longus | Radial nerve (posterior interosseous nerve) | C7, C8 |
Finger abduction | Dorsal interossei, Abductor digiti minimi | Ulnar nerve | C8, T1 |
Finger and thumb adduction in plane of palm | Adductor pollicis, Palmar interossei | Ulnar nerve | C8, T1 |
Thumb opposition | Opponens pollicis | Median nerve | C8, T1 |
Thumb abduction perpendicular to plane of palm | Abductor pollicis brevis | Median nerve | C8, T1 |
Flexion at distal interphalangeal joints digits 2, 3 | Flexor digitorum profundus to digits 2, 3 | Median nerve | C7, C8 |
Flexion at distal interphalangeal joints digits 4, 5 | Flexor digitorum profundus to digits 4, 5 | Ulnar nerve | C7, C8 |
Wrist flexion and hand abduction | Flexor carpi radialis | Median nerve | C6, C7 |
Wrist flexion and hand adduction | Flexor carpi ulnaris | Ulnar nerve | C7, C8, T1 |
Wrist extension and hand abduction | Extensor carpi radialis | Radial nerve | C5, C6 |
Elbow flexion (with forearm supinated) | Biceps, Brachialis | Musculocutaneous nerve | C5, C6 |
Elbow extension | Triceps | Radial nerve | C6, C7, C8 |
Arm abduction at shoulder | Deltoid | Axillary nerve | C5, C6 |
Action | Muscles | Nerves | Nerve Roots |
---|---|---|---|
Hip flexion | Iliopsoas | Femoral nerve, and L1-L3 nerve roots | L1, L2, L3, L4 |
Knee extension | Quadriceps | Femoral nerve | L2, L3, L4 |
Knee flexion | Hamstrings (semitendinosus, semimembranosus, biceps femoris) | Sciatic nerve | L5, S1, S2 |
Leg abduction | Gluteus medius, Gluteus minimus, Tensor fasciae latae | Superior gluteal nerve | L4, L5, S1 |
Leg adduction | Obturator externus, Adductor longus, magnus, and brevis, Gracilis | Obturator nerve | L2, L3, L4 |
Toe dorsiflexion | Extensor hallucis longus, Extensor digitorum longus | Deep peroneal nerve | L5, S1 |
Foot dorsiflexion | Tibialis anterior | Deep peroneal nerve | L4, L5 |
Foot plantar flexion | Triceps surae (gastrocnemius, soleus) | Tibial nerve | S1, S2 |
Foot eversion | Peroneus longus, Peroneus brevis | Superficial peroneal nerve | L5, S1 |
Foot inversion | Tibalis posterior | Tibal nerve | L4, L5 |
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