Reflex testing is a medical procedure used to evaluate the body's automatic responses to stimuli. It often involves assessing the nervous system's function by checking how quickly and effectively the body reacts to certain triggers, such as tapping a tendon. This helps healthcare professionals identify potential issues with the nervous system or muscle function. During reflex testing, a healthcare provider may use a reflex hammer to strike specific areas, like the knee or ankle, to observe the resulting movements. The responses can indicate the health of the spinal cord, nerves, and muscles, aiding in diagnosing conditions such as neuropathy or spinal injuries.