Many reflexes are normal. For example, the knee jerk is a normal reflex and the absence of this reflex would be considered abnormal. Many reflexes are normal in a newborn or young child but would be abnormal if found in an adult.

What does it mean if you have no reflexes in your knees?

The normal response is a 'knee jerk'. This is an example of a reflex, which is an involuntary muscular response elicited by the rubber hammer tapping the associated tendon. When reflex responses are absent this could be a clue that the spinal cord, nerve root, peripheral nerve, or muscle has been damaged.

What causes lack of reflexes in legs?

If your doctor rates your reactions 0 or 1, your muscles show little to no contraction during the test. The most common cause of low reflex response is peripheral neuropathy. Diabetes, anemia, and vitamin deficiency are possible causes of absent reflexes. However, the conditions don'tcause brisk reflexes.