inverse stretch reflex
[10] The response is also known as the lengthening reaction because of the spastic muscle's reaction to lengthening. They are found in the cerebral cortex and brainstem and carry information down to activate interneurons and lower motor neurons, which in turn directly signal muscles to contract or relax. The body reacts in a predetermined way based on specific stimulus. The ophthalmic and maxillary nerves are purely sensory, whereas the mandibular nerve supplies motor as well as sensory (or "cutaneous") functions. The reflex is then an automatic response to a stimulus that does not receive or need conscious thought. It is one of the characteristic responses of an upper motor neuron lesion. When a muscle spindle is stretched an impulse is immediately sent to the spinal cord and a response to contract the muscle is received. The stretch reflex in the calf muscle for example is triggered within 3 hundredths of a second, so any claim that a particular type of stretching can somehow bypass or outsmart the stretch reflex is nothing more than fantasy. But who is to say that the person you are watching is doing it right? inverse stretch reflex Quick Reference A reflex action mediated by the Golgi tendon organs that, when the organs are stimulated by a prolonged stretch, cause the stretched muscle to relax. Before publishing your Article on this site, please read the following pages: 1. Different classes of spinal interneurons are involved in the process of sensory-motor integration. [1] [3] Whereas the stretch reflex regulates muscle length, the tendon reflex helps regulate muscle force. This way, you will avoid injury and get the maximum benefits from your stretching. [2] Note that the disynaptic reflex pathway does not always have inhibitory effects: under certain conditions, GTO stimulation can result in motoneuron excitation. The stretch reflex is a muscle contraction in response to stretching within the muscle. From:  However, their role is important in keeping muscle spindles taut, thereby allowing the continued firing of alpha neurons, leading to muscle contraction. This reflex relaxation of the extrafusal muscle fibers response to rise in muscle tension is called the negative (inverse) stretch reflex. At the same time, the stretch reflex has an inhibitory aspect to the antagonist muscles. These impulses travel from the spinal cord to the muscle and back again in a continuous loop. Maybe you have done this yourself: You watch other people stretch in the gym and try to imitate what you see. Useful notes on fetoplacental unit and its physiological significance, Controlling in Management # Meaning, Definition, Types, Process, Steps and Techniques. They receive input from the reticular formation of the pons in the brainstem. [5], The reduced efferent (motor) drive to the muscle by way of autogenic inhibition is a factor historically believed to assist target muscle elongation, although current literature casts doubt on this hypothesis. Google cites over 100,000 references to him and his work on the internet. Both muscles would end up contracting simultaneously. And the Handbook will show you, step-by-step, how to perform each stretch correctly and safely. The other two classes are the group B nerve fibers, and the group C nerve fibers. This is a result of stimulation of the Golgi ten-don organs , which are networks of nerve endings, located in series, in the tendon of a muscle.


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