Diminished deep tendon reflex A reduction (hyporeflexia) or complete absence (areflexia) of the involuntary muscle contraction normally elicited by a reflex stimulus, such as tapping a deep tendon. UMLS:C1866934 The deep tendon reflex is a monosynaptic reflex arc with sensory and motor nerve components, but the arc is much more vulnerable to sensory nerve damage. Ankle plantar flexion is retained in all but the most severe peripheral neuropathies, and thus loss of the Achilles tendon reflex in an objective indication of a substantial sensory nerve defect. Absent or decreased deep tendon reflexes Decreased/absent deep tendon reflexes Reduced tendon reflexes Hypoactive to absent deep tendon reflexes Decreased deep tendon reflexes Decreased tendon reflexes Depressed tendon reflexes Diminished or absent deep tendon reflexes Diminished or absent tendon reflexes HP:0001316 Reduced/absent deep tendon reflexes Weak or absent deep tendon reflexes Decreased to absent deep tendon reflexes Impaired tendon reflexes Diminished deep tendon reflexes HP:0001315 Abnormal reflex