The deep tendon reflex (DTR) examination is part of the neurologic exam. They were first described by Wilhelm Heinrich Erb and Carl Friedrich Otto Westphal more than a century ago. Their use continues to this day. The presence of hyporeflexia or hyperreflexia may indicate an underlying disease. Proper technique and interpretation of results are crucial to help in the diagnosis of many upper and lower motor neuron pathologic processes such as multiple sclerosis, amyotrophic lateral sclerosis, spinal cord injuries, spinal muscular atrophies, among others. They are sometimes referred to as muscle stretch reflexes.
Source: Neurology Residents