Spinal Cord Injury by Nerve Root Levels Spinal Root Sensory Motor Reflex C4 Acromioclavicular Joint Respiration None C5 Radial Antecubital Fossa Elbow Flexion Biceps Reflex C6 Dorsal Thumb Wrist Extension Brachioradialis Reflex C7 Dorsal Middle Finger Elbow Extension Triceps Reflex C8 Dorsal Little Finger Finger Flexion None T1 Ulnar Antecubital Fossa Finger Abduction None T7-T12 See Dermatomes Abdominal Muscles Abdominal Reflex L2 Anterior Medial Thigh Hip Flexion Cremasteric Reflex L3 Medial Femoral Condyle Knee Extension None L4 Medial Malleolus Ankle Dorsiflexion Knee Jerk Reflex L5 First web space (ISt/2nd MTP) Big Toe Extension Hamstring Reflex S1 Lateral Calcaneus Ankle Plantarflexion Ankle Jerk Reflex S2 Popliteal Fossa Anal Sphincter Bulbocavernosus S3/S4 Perianal Region Anal Sphincter None #SpinalCord #Injury #NerveRoots #Levels #differential #diagnosis #Neurology #Spine
