The knee jerk reflex can be tested by tapping just below the knee causing the lower leg to suddenly jerk forward. You are working the patella tendon. This is the tendon that runs down from the ...

Medically reviewed by Brigid Dwyer, MD Key Takeaways Clonus causes involuntary, rhythmic muscle contractions when a muscle is stretched.It is often observed in conditions like multiple sclerosis, ...

The knee-jerk or 'patellar jerk' reflex occurs when the knee is tapped below the knee-cap (patella). Sensors that detect stretching of the tendon of this area send ...

You might have experienced the popular knee jerk in the doctors room or you may have heard of someone having an automatic 'knee-jerk response' to a situation without thinking. Strange, isn't it? Well, ...

Are reflexes different to reactions? Yes. An example of a reflex is when someone taps the knee (patella) tendon softly with a mallet. Your knee lurches forward and your brain has no control over its ...

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Patellar tendonitis — also called jumper’s knee — is a type of knee tendon pain. It happens when the tendons connecting the kneecap to the shinbone become inflamed from overuse. Repetitive motions, ...

Reported to the Section for Clinical Medicine, Pathology and Hygiene of the Suffolk District Medical Society, June 9, 1885.