What causes crossed extensor reflex?
Crossed Extensor Reflex The reflex occurs when the flexors in the withdrawing limb contract and the extensors relax, while in the other limb, the opposite occurs. An example of this is when a person steps on a nail, the leg that is stepping on the nail pulls away, while the other leg takes the weight of the whole body.
What happens in a crossed extensor reflex quizlet?
The crossed-extensor reflex is obvious when you step barefoot on broken glass. what does the The ipsilateral response causes you to do? quickly lift your injured foot, while the contralateral response activates the extensor muscles of your opposite leg to support the weight suddenly shifted to it.
Why is it called Monosynaptic?
“Mono” means one. “Synapse” just means a space between two neurons where the message transfers between them. That means, in the knee-jerk reflex, there is only one point where the message transfers between neurons, so it is monosynaptic.
What is the difference between flexor and crossed extensor reflexes?
The reflex occurs when the flexors in the withdrawing limb contract and the extensors relax, while in the other limb, the opposite occurs. The crossed extensor reflex is contralateral, meaning the reflex occurs on the opposite side of the body from the stimulus.
What is the purpose of stretch reflex?
The muscle stretch reflex is a reflex arc that responds to stretching of muscle fibers to keep the muscle in an appropriate state of tension and tone, ready to contract or relax as needed. The sensory input (afferent) of the reflex is from two structures in the muscle called spindles and Golgi tendon organs.
What is the Polysynaptic reflex?
Any reflex with more than one synapse (1), not counting the synapse between neuron and muscle, and hence involving one or more interneurons. In humans, all reflexes except stretch reflexes are polysynaptic.