H-reflex is done in: (A) L 2 radiculopathy, (B) L 3 radiculopaty, (C) L 4 radiculopaty, (D) S 1 radiculopty
Answer is D. The H-reflex is a reflectory reaction of muscles after electrical stimulation of sensory fibers in their innervating nerves. The H-reflex test is performed using an electric stimulator, which gives usually a square-wave current of sho duration and small amplitude, and an EMG set, to record the muscle response. Ref Harrison20th edition pg 2567