Question

На приеме у невропатолога врач постукивает молоточком по колену пациента. Для чего он это делает?

Answer 1

Чтобы проверить нервные рефлексы

Answer 2

Purpose of the Knee Reflex Test

When a neurologist or neurologically trained healthcare professional taps a patient's knee with a reflex hammer, it is known as the knee reflex test or the patellar reflex test. This test is performed to assess the integrity and function of the patellar reflex, also known as the knee-jerk reflex. The knee reflex is a deep tendon reflex that involves the sensory and motor pathways of the nervous system.

How the Knee Reflex Test Works

During the knee reflex test, the doctor taps the patellar tendon, which is located just below the kneecap. This tap stimulates the sensory receptors in the tendon, called muscle spindles. The sensory information is then transmitted to the spinal cord through the sensory nerves. In response to this stimulus, the spinal cord sends a signal back through the motor nerves to the quadriceps muscle, causing it to contract. This contraction results in the characteristic knee jerk or knee extension movement.

Purpose and Significance of the Knee Reflex Test

The knee reflex test is a simple and quick way to assess the functioning of the stretch reflex arc and the integrity of the nerves involved. It helps healthcare professionals evaluate the integrity of the spinal cord, the nerve roots, and the peripheral nerves that are responsible for the knee reflex. Any abnormalities in these structures can affect the knee reflex response.

The knee reflex test is commonly used in neurological examinations to assess the functioning of the nervous system. It can provide valuable information about the presence of certain neurological conditions or abnormalities, such as spinal cord injuries, nerve compression, nerve damage, or neurological disorders.

Conclusion

In summary, the knee reflex test is performed by tapping the patellar tendon to assess the integrity and function of the knee reflex. It helps healthcare professionals evaluate the functioning of the nervous system and can provide valuable information about the presence of neurological conditions or abnormalities.