Search results
Results from the WOW.Com Content Network
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.
The stretch reflex (myotatic reflex), or more accurately "muscle stretch reflex", is a muscle contraction in response to stretching a muscle. The function of the reflex is generally thought to be maintaining the muscle at a constant length but the response is often coordinated across multiple muscles and even joints. [ 1 ]
Knee jerk or patellar reflex — a kick caused by striking the patellar tendon with a tendon hammer just below the patella, stimulating the L4 and L3 reflex arcs. Moro reflex , a primitive reflex — only in all infants up to 4 or 5 months of age: a sudden symmetric spreading of the arms, then unspreading and crying, caused by an unexpected ...
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 ...
In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action [1] and nearly instantaneous response to a stimulus. [2] [3] The simplest reflex is initiated by a stimulus, which activates an afferent nerve. The signal is then passed to a response neuron, which generates a response.
Tendon reflex (or T-reflex) may refer to: The stretch reflex or muscle stretch reflex (MSR), when the stretch is created by a blow upon a muscle tendon. This is the commonly used definition of the term. [1] [2] Albeit a misnomer, in this sense a common example is the standard patellar reflex or knee-jerk response. [3]
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.
One two, put on my shoe - S1/2 roots for Achilles reflex (foot plantarflexion) Three four, kick the door - L3/4 roots for patellar reflex (knee extension) Five six, pick up sticks - C5/6 roots for brachioradialis and biceps brachii reflexes (elbow flexion) Seven eight, shut the gate - C7/8 roots for triceps brachii reflex (elbow extension)