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Spinal Segment Distr
Spinal segmental motor, movement, relfex, and sensory distributions
Segment | Motor | Movement | Reflex | Sensory |
---|---|---|---|---|
C7 | Wrist flexors, triceps | Wrist flexion, elbow extension | Triceps tendon | Index, middle, and ring |
C8 | Thenar muscles | Thumb extension | Ulnar border of hand | |
Ti | Interossei | Abduction & adduction of fingers | Medial arm | |
L2 | Iliopsoas | Hip flexion | Anterolateral thigh | |
L3 | Iliopsoas, quadriceps | Hip flexion, knee extension | Patellar tendon | Anteromedial & distal thigh |
L4 | Tibialis anterior | Ankle dorsiflexion | Patellar tendon | Medial calf and ankle |
L5 | Extensor hallicus longus | Toe extension | Lateral leg, anterior shin, and foot | |
S1 | Fibularis longus/brevis | Plantar flexion & eversion | Achilles tendon | Lateral ankle and foot |
S2 | Hamstrings | Knee flexion | Medial posterior thigh | |
C4 | Upper traps | Shoulder shrug | Upper trap, lower neck | |
C5 | Deltoid, biceps | Shoulder abduction, elbow flexion | Biceps tendon | Deltoid area |
C6 | Wrist extensors, biceps | Wrist extension, elbow flexion | Brachioradialis tendon | Radial border of hand |