Reflex tests measure the presence and strength of a number of reflexes. In so doing, they help to assess the integrity of the nerve circuits involved.

The examiner uses a rubber mallet to strike different points on the patient's body, and observes the response.

This is the palpebral reflex and tests the function of cranial nerves V and VII. Absence of a palpebral reflex indicates an adequate plane of anesthesia for most surgical procedures.

The patella reflex tests the integrity of the patellar tendon and the sensory and motor pathways that control the reflex. When the patellar tendon is tapped, it should cause the quadriceps muscle to contract and the lower leg to extend. If there is a lack of response or an abnormal response, it can indicate a problem with the nervous system.

spinal reflex