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.

Diminution of tendon reflexes, which is an invariable sign of peripheral nerve disease.

HP:0001316

Absent or decreased deep tendon reflexes, Decreased deep tendon reflexes, Hypoactive to absent deep tendon reflexes, Reduced/absent deep tendon reflexes, Depressed tendon reflexes, Impaired tendon reflexes, Diminished deep tendon reflexes, Decreased tendon reflexes, Diminished or absent tendon reflexes, Weak or absent deep tendon reflexes, Decreased to absent deep tendon reflexes, Diminished or absent deep tendon reflexes, Decreased/absent deep tendon reflexes

HP:0001315