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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.
When the weights and angles are correctly adjusted, an oscillation will start in the muscle of the calf with a frequency of about six to eight per second and an amplitude of about half an inch at the knee. This oscillation is called clonus in neurophysiology and is a recurrent series of patellar reflexes, generated in a feedback circuit. The ...
A list of reflexes in humans. Abdominal reflex; Accommodation reflex — coordinated changes in the vergence, lens shape and pupil size when looking at a distant object after a near object. Acoustic reflex or attenuation reflex — contraction of the stapedius and tensor tympani muscles in the middle ear in response to high sound intensities.
The Babylist First Aid Kit was created with pediatric ER doctors, with hospital-grade medical supplies and soothers you'll want for baby's first year, including a nasal bulb, baby nail clippers, a ...
pressure over symphisis pubis elicits knee, hip flexion and leg abduction Brudziński reflex: Józef Brudziński: neurology: meningitis: passive flexion of knee to abdomen elicits flexion of contralateral hip and knee Bruit de Roger: Henri-Louis Roger: paediatric cardiology: ventricular septal defect: loud pansystolic murmur Bruns ataxia ...
The patellar reflex (knee jerk) is an example of the stretch reflex and it is used to determine the sensitivity of the stretch reflex. Reflexes can be tested as part of a neurological examination, often if there is an injury to the central nervous system. To test the reflex, the muscle should be in a neutral position.
Westphal's sign is the clinical correlate of the absence or decrease of patellar reflex or knee jerk. Patellar reflex or knee jerk is a kind of deep or stretch reflex where an application of a stimulus to the patellar tendon such as strike by a solid object or hammer caused the leg to extend due to such stimulus causes the quadriceps femoris muscle to contract.
The definitive treatment for pre-eclampsia is the delivery of the baby and placenta, but danger to the mother persists after delivery, and full recovery can take days or weeks. [13] The timing of delivery should balance the desire for optimal outcomes for the baby while reducing risks for the mother. [15]