GENERAL HISTOLOGY

Detailed explanation-1: -knee-jerk reflex, also called patellar reflex, sudden kicking movement of the lower leg in response to a sharp tap on the patellar tendon, which lies just below the kneecap.

Detailed explanation-2: -Jerking of the knee when hit below the knee cap is a type of simple reflex. Simple reflexes are the type of reflex that is found in an organism starting from birth and are also called inborn or inherited reflexes.

Detailed explanation-3: -You use the phrase ‘Knee Jerk Reaction’ to indicate that you’ve made an automatic response to something. Example of use: “I hauled off and hit him when he jumped out at me. I know he was playing a trick, but it was a knee jerk reaction!”

Detailed explanation-4: -The patellar reflex, also called the knee reflex or knee-jerk, is a stretch reflex which tests the L2, L3, and L4 segments of the spinal cord.

Detailed explanation-5: -It is a stretch reflex. It tests the second, third, and fourth lumbar segments of the spinal cord. It is caused by striking the knee-tendon or the patella region. When the knee-tendon or the patella region is struck then it produces a signal wave that travels back to the spinal cord.