What is a reflex of the knee twitch?

The reflex of the knee twitch is when the tendon above Kneecap is tapped on the reflective hammer that causes the entire leg to avoid involuntarily. Starting the reflex is relatively simple, although only beating over Kneecap does not cause reflex - the patellar tendon must be tapped. This causes the nerve receptors of the tendon to fire and the leg involuntarily tears. This nerve damage test has become so well known that he entered the American Lexicon.

Reflex is famous because of the way it illustrates different types of nerve paths in the body. The patellar tendon will move when pressure exerts on it, whether the patient wants it. This is because the nerves are connected directly to the spinal cord than to the brain. The reflective reflection test of the knee twitching is therefore used to control nerve damage in the nervous system as a whole. The legs that do not overcome at all or that the jerk continuously after being hit is considered unusual. A medical expert will compare the various answers that he gets into every foot to determine whether to be damagedonly in one.

The complete lack of knee reflex can be a sign of several nerve conditions and is referred to as the "Westphal sign" after the 18th century by Carl Friedrich Otto Westphal. It can be a sign of spine damage, damage to femoral nerve or multiple sclerosis. This may even be the result of thyroid disease that can change all the time of motor reaction.

Reflex time can also be changed by external conditions. For example, some studies report that time is shorter after patient use. Another unusual reference is that a distracted person can have more patellar reflex, as if the function of the unconscious reflects his unconsciousness.

This test became built into popular culture as an idiom with the phrase "knee -twinkling". It means responding to something with prejudice or making the prerequisites about something or someone with a little idea. Its first use wasAbout in the 18th century, when the words of the preacher were compared with a hammer that hit the knees of the believers, but did not receive any answer.