H reflex on electromyography is seen in:: (A) L1 Radiculopathy, (B) L4 Radiculopathy, (C) L5 Radiculopathy, (D) S1 Radiculopathy
Answer is D. The H reflex is basically an electrophysiologically recorded Achilles tendon stretch reflex Is performed by stimulating the tibial nerve in popliteal fossa. It is recorded over the soleus or gastrocnemius muscles. It is used most commonly to evaluate S1 radiculopathy or to distinguish it from an L5 radiculopathy.i