knee jerk response meaning
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knee-jerk reaction knee-jerk reaction. Fig. an automatic or reflex reaction; an immediate reaction made without examining causes or facts. With one of his typical knee-jerk reactions, he said no immediately, citing some moral argument that no one understood. See also: reaction.
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- The knee-jerk reflex involves a sudden kicking movement of your lower leg after the tendon just below your kneecap has been tapped. Doctors often trigger this reflex to test the function of your nervous system. If the reaction is exaggerated or absent, it may indicate a damage to the central nervous system.
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- New Delhi, May 19 ( ANI ): Senior Congress leader, Ajit Jogi on Monday asked the party leaders not to take any knee-jerk reaction and pointed out that, had the party effectively countered the allegations leveled by the BJP during the elections, then the party would not have had to face such level a defeat.
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reflex a reflected action or movement; the sum total of any particular automatic response mediated by the nervous system. A reflex is built into the nervous system and does not need the intervention of conscious thought to take effect.hen the knee is tapped, the nerve that receives this stimulus sends an impulse to the spinal cord, where it is relayed to a motor nerve. This causes the quadriceps muscle at the front of the thigh to contract and jerk the leg up. This reflex, or simple reflex arc, involves only two nerves and one synapse.
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reflex 1. contraction of the pupil on exposure of the retina to light. 2. any reflex involving the iris, resulting in change in the size of the pupil, occurring in response to various stimuli, e.g., change in illumination or point of fixation, sudden loud noise, or emotional stimulation. quadriceps reflex knee jerk.
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Translations for H-REFLEX Here are all the possible meanings and translations of the word H-Reflex. Freebase(0.00 / 0 votes)Rate this definition: H-reflex. The H-reflex is a reflectory reaction of muscles after electrical stimulation of sensory fibers in their innervating nerves. The H-reflex test is performed using an electric stimulator, which gives usually a square-wave current of short duration and small amplitude, and an EMG set, to record the muscle response. That response is usually a clear wave, called H-wave, 28-35 ms after the stimulus, not to be confused with an F-wave.
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knee jerk knee jerk. You experience a knee jerk when your doctor taps your knee with a rubber mallet and your leg automatically kicks out. The idiom a knee jerk reaction means that you respond to something in an equally unthinking way. If you instinctively assume that someone who loves clowns wouldn't have much in common with you, that's a knee jerk, or automatic, reaction. This figurative meaning of knee jerk came from the physical reflex — which is called a patellar reflex by doctors, and which was discovered and named in the 1870's.
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Translations for knee jerk Definitions for knee jerk. Here are all the possible meanings and translations of the word knee jerk. Princeton's WordNet(0.00 / 0 votes)Rate this definition: knee jerk, knee-jerk reflex, patellar reflex(noun) a reflex extension of the leg resulting from a sharp tap on the patellar tendon. Knee jerk(n.) emotional and predictable; -- of certain people and their reactions to events. Chaldean Numerology. The numerical value of knee jerk in Chaldean Numerology is: 9.
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jaw jerk jaw jerk. Chin reflex. knee jerk. The extension of the lower leg upon striking the patellar tendon when the knee is flexed at a right angle. Knee jerk is absent in locomotor ataxia, infantile paralysis, meningitis, destructive lesions of the lower part of the spinal cord, and certain forms of paralysis.
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Understanding the Stretch Reflex (or Myotatic Reflex) The stretch reflex; which is also often called the myotatic reflex, knee-jerk reflex, or deep tendon reflex, is a pre-programmed response by the body to a stretch stimulus in the muscle.he stretch reflex is very important in posture. It helps maintain proper posturing because a slight lean to either side causes a stretch in the spinal, hip and leg muscles to the other side, which is quickly countered by the stretch reflex. This is a constant process of adjusting and maintaining.
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reflex reflex action. an involuntary response to a stimulus conveyed to the nervous system and reflected to the periphery (see also reflex). reflex bradycardia. bradycardia occurring as a reflex initiated by severe atrial or ventricular stretch. positive reaction is a sharp contraction of the muscle of which the tendon is part. The patellar reflex is the best known of these reflexes. Absence indicates a defect in the reflex arc, an exaggerated response suggests an upper motor neuron lesion. Called also myotactic reflex.
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reflex a reflected action or movement; the sum total of any particular automatic response mediated by the nervous system. A reflex is built into the nervous system and does not need the intervention of conscious thought to take effect. The knee jerk is an example of the simplest type of reflex. When the knee is tapped, the nerve that receives this stimulus sends an impulse to the spinal cord, where it is relayed to a motor nerve. This causes the quadriceps muscle at the front of the thigh to contract and jerk the leg up.
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Reflexologyâ¦Welcome to the Knee Joint *Torn Cartilage. Reflexology is a valuable tool that helps with not only the pain associated with knee issues, but is also a means for keeping the knees strong and healthy. These are the main reflex points on which I focus, when attending a client with knee weakness. Knee Reflex. *In order to strengthen the knee joint and to send healing energy to any injured area. Location: a small, soft triangular section, about 1 inch below the ankle bone. Spine Reflex. *The spine is the main support for the entire body, taking some of the weight off the knees.
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What is a Spinal Reflex? A spinal reflex is a reflexive action mediated by cells in the spinal cord, bypassing the brain altogether. A classic example is the kneejerk or patellar reflex, where the leg jerks when the kneecap is struck with a brisk tap. spinal reflex will bypass the brain and is an action only by the cells in the spinal cord.
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- A hiccup (/ˈhɪkəp/ HIK-əp; also spelled hiccough) is an involuntary contraction (myoclonic jerk) of the diaphragm that may repeat several times per minute. In medicine, it is known as synchronous diaphragmatic flutter (SDF), or singultus, Latin for the act of catching one's breath while sobbing.
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Ch. 11 Spinal cord: clinical applications What is Patellar reflexes (knee jerk)? this stretch reflex involves extension of the leg at the knee joint by contraction of the quadriceps femoris muscle in response to tapping the petellar ligament.
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- A hiccup is an involuntary contraction (myoclonic jerk) of the diaphragm that may repeat several times per minute. In Latin it is called singultus for the act of catching one's breath while sobbing. The hiccup is an involuntary action involving a reflex arc. Once triggered, the reflex causes a strong contraction of the diaphragm followed about 0.25 second later by closure of the vocal cords, which results in the classic hic sound. Hiccups may occur individually, or they may occur in bouts. The rhythm of the hiccup, or the time between hiccups, tends to be relatively constant. A bout of hiccups, in general, resolves itself without intervention, although many home remedies are often used to attempt to shorten the duration.
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- Question 1 Describe how a plasmid can be genetically modified to include a piece of foreign DNA that alters the phenotype of bacterial cells transformed with the modified plasmid.
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Function: Voluntary and Involuntary Responses Function: Voluntary and Involuntary Responses. The responses of the nervous system to stimuli may be voluntary or involuntary. Voluntary responses are mainly under conscious control, but some voluntary movements, such as walking, require less conscious attention. There are two types of involuntary response, autonomic and reflex.
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Medical Definition of Knee jerk Definition of Knee jerk. Knee jerk: The reflex that is tested by tapping just below the bent knee on the patellar tendon. Normally this causes the quadriceps muscle to contract and bring the lower leg forward. It has given rise to the saying 'a knee-jerk reaction.' Also known as patellar reflex. Last Editorial Review: 5/13/2016.
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- human nervous system: Muscle spindles. The familiar knee-jerk reflex, tested routinely by physicians, is a spinal reflex in which a brief, rapid tap on the knee excites muscle spindle afferent neurons, which then excite the motor neurons of the stretched muscle via a single synapse in the spinal cord.
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Startle reflex in: Startle reflex. The startle reaction, also called the startle response, startle reflex or alarm reaction, is the response of mind and body to a sudden unexpected stimulus, such as a flash of light, a loud noise (acoustic startle reflex), or a quick movement near the face.
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- The most well-known human reflex is the knee-jerk (or patella) reflex. This is the one where you use a reflex hammer to hit the tendon just below the kneecap (or patella). The… leg jerks out like you're kicking.
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reflex a reflected action or movement; the sum total of any particular automatic response mediated by the nervous system. A reflex is built into the nervous system and does not need the intervention of conscious thought to take effect. The knee jerk is an example of the simplest type of reflex.
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Knee-jerk reflex The knee jerk, or patellar reflex, that follows a tap just below the kneecap of a freely hanging leg is one such involuntary reflex. Sensory (afferent) impulses from stretching the receptors (e.g., in the muscles) relay to the spinal cord and activate a path to the…
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