Patellar Reflex

The knee reflex (Patellar reflex) is a type of monosynaptic reflex of the spinal cord that occurs in response to impact on the muscle tendons. In this case, a sudden contraction of the muscles occurs, which leads to extension of the lower leg. This reflex is used to evaluate the connection between sensory nerve endings, the spinal cord and motor neurons.

The reflex occurs when a light blow is applied to the quadriceps tendon below the patella. This causes the muscle to stretch, causing it to contract. Thus, the reflex is an example of a reflex arc, which consists of stretch receptors, spinal cord and motor neurons.

Normally, the knee reflex is present in all people. However, if there is disease or damage to the spinal cord or other structures associated with reflexes, this reflex may be absent or impaired. This may indicate neurological problems such as spinal cord damage, sensory nerve problems, or motor neuron problems.

Assessment of the knee jerk reflex is an important diagnostic test for neurological diseases. It allows you to determine which spinal cord structures are involved in the reflex and what changes may be caused by the disease. Additionally, patellar reflex assessment can be used to determine the effectiveness of treatment and evaluate recovery from spinal cord injuries or injuries.

Thus, the knee reflex is an important tool in the diagnosis and treatment of neurological diseases. Its assessment allows us to determine the condition of the spinal cord and its connection with other structures, which can help in choosing the optimal treatment and assessing its effectiveness.



The knee reflex is one of the most commonly used reflexes to test a person's neurological condition. This test provides valuable information about spinal cord function, sensory nerves, and muscles. Despite the fact that the patient feels a short blow at a certain point on the limb, he does not regain consciousness when undergoing the test. Another feature of this reflex is that no communication occurs between the participant-subject and the observer. The patient is unaware that he has been asked to measure reflexes.

The reflex appears in response to irritation of the tendons, which is located below the patella (a.s. patellae) and is part of the quadriceps femoris muscle (m. vastus quarttus intermedius). Patendoni release rate tests test the neuromuscular conduction of the spinal cord. They also determine muscle tone and neuro-articular control. Nerve damage causing paresthesia