Patellar reflex - Wikipedia
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. Many animals, most significantly humans, have been seen to have the patellar reflex, including dogs, cats, horses, and other mammalian species. [1] Representation of the patellar reflex pathway.
Simple Ways to Test the Knee Jerk Reflex: 7 Steps (with Pictures) - wikiHow
May 9, 2024 · Sit on the edge of a bed or table with your legs dangling. Find a surface that’s high enough so that you can let your legs dangle freely when you’re sitting on it. Keep your knees bent at a 90° angle when you sit. [1] Your legs will need to …
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Knee-jerk reflex | Muscle contraction, Nerve Impulses, Reflex Arc ...
knee-jerk reflex, sudden kicking movement of the lower leg in response to a sharp tap on the patellar tendon, which lies just below the kneecap. One of the several positions that a subject may take for the test is to sit with knees bent and with one leg crossed over the other so that the upper foot hangs clear of the floor.
The Knee Jerk Reflex: More Than A Simple Medical Test
Oct 27, 2021 · Before we talk about when the reflex is used, it is important to understand what a reflex is in general, and how the knee-jerk reflex specifically works. A reflex is a fast, automatic response to a stimulus, requiring no input from the brain. There are two types of healthy reflexes: muscle stretch and cutaneous reflexes.
Knee Jerk Reflex - Everything You Need To Know - YouTube
Sep 6, 2013 · The knee jerk reflex or patellar reflex is a deep tendon reflex seen as a sudden kicking movement of the lower leg in response to a sharp tap on the patellar tendon. Tapping the...
Westphal Sign - StatPearls - NCBI Bookshelf - National Center …
Feb 6, 2023 · Westphal’s sign refers to a decreased or absent patellar tendon reflex, also known as the knee-jerk reflex, observed on physical exam. The patellar tendon reflex refers to a kicking-like motion produced by the extension of the knee joint upon the ipsilateral stimulation of the patellar tendon.
Understanding the Knee-jerk Response Reflex Test
Jun 4, 2017 · Reflex tests, particularly the knee-jerk response, offer valuable insights into the integrity of the nervous system, including the spinal cord and specific nerve roots.
Assessment of Patellar and Achilles Reflexes
There are several kinds of reflexes. Examples are shivering in response to low core body temperature; or withdrawing your hand from a hot stove when temperature and pain receptors in your hand register the stimulus. A reflex arc refers to the neural pathway that a nerve impulse follows. The reflex arc typically consists of five components:
Patellar Reflex - (Anatomy and Physiology I) - Fiveable
The patellar reflex, also known as the knee-jerk reflex, is a monosynaptic spinal reflex that evaluates the integrity of the L2-L4 spinal cord segments and the femoral nerve. It is one of the most commonly tested deep tendon reflexes during a neurological examination.
Deep Tendon Reflexes - Stanford Medicine 25
There are five deep tendon reflexes and a number of superficial and visceral reflexes covered here.