What is patellar clonus

summary

Recently, I learned that I was suffering from patellar clonus. I had never heard of this disease. I felt flustered and didn't know what to do. I was really worried. Now let's talk about what patellar clonus is.

What is patellar clonus

First, the patient was lying on his back and his lower limbs were straight. The examiner clamped the upper edge of the patella with his thumb and forefinger, pushed it down suddenly, and maintained no relaxation. The quadriceps femoris tendon attached to the upper edge of the patella was elongated. When the knee reflex increased, the muscle contracted, and the tendon continued to elongate, and the patella vibrated rhythmically.

Second, patellar clonus is an indication of high degree of tendon reflex enhancement, which can occur in any situation with tendon reflex enhancement, including when there is no organic lesion in the nervous system. Clonus in neurosis and hyperreflexia is different from that in organic lesions.

Third: for neurosis and systemic hyperreflexia, the former is usually not constant, the degree of performance on both sides is generally equal, without organic symptoms. Asymmetry of bilateral reflex indicates organic disease. The damage of reflex arc in nerve root or gray matter of spinal cord, or the enhancement of one side reflex, indicates the damage of pyramidal tract.

matters needing attention

To sum up, we can understand what is patellar clonus, what is caused by patellar clonus, and the adverse symptoms that patellar clonus may bring to patients. Therefore, patients with patellar clonus should be treated in time.