Reflexes are automatic and involuntary actions the body produces in response to certain stimuli. While some reflexes can involve muscles and movement, others involve internal processes within the body ...

Damage to any nerve in your body can have unexpected results. In some cases, damage to a nerve can cause you to lose a muscle reflex, like the one that makes your knee jerk during a physical exam.

Brisk reflexes refer to an above-average response during a reflex test. During a reflex test, your doctor tests your deep tendon reflexes with a reflex hammer to measure your response. This test is ...