The grey column refers to a somewhat ridge-shaped mass of grey matter in the spinal cord. The stretch reflex is very important in posture. A spinal reflex is a fast response that involves an afferent signal into the spinal cord and an efferent signal out to the muscle. 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. The result is a quick, although mild, contraction of the quadriceps muscles, resulting in a small kicking motion. A nuclear chain fiber is a specialized sensory organ contained within a muscle. Clinical Medicine, View all related items in Oxford Reference », Search for: 'inverse stretch reflex' in Oxford Reference ». These neurons also play a role in adjusting the sensitivity of muscle spindles. While the recommendations on this page are a good place to start, you'll get a lot more benefit when you add the right stretches to your training program. This is the in-verse stretch reflex ortendon reflex(see Figure 5.33), a protective reflex preventing injury to the mus-cle and tearing of tendons from the bone. The Golgi tendon reflex operates as a protective feedback mechanism to control the tension of an active muscle by causing relaxation before the tendon tension becomes high enough to cause damage. 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. The axons from the lower motor neurons are efferent nerve fibers that carry signals from the spinal cord to the effectors. The multiple sensory/control inputs may allow fine motor activities, such as grasping a delicate object, in which other senses may guide force control. This is important because if the muscle is working against a load and shortening during contraction and an additional load is added, the muscle recognizes the stretch immediately and can compensate with a stronger contraction. The stretch reflex can be a monosynaptic reflex which provides automatic regulation of skeletal muscle length, whereby the signal entering the spinal cord arises from a change in muscle length or velocity. The reflex is then an automatic response to a stimulus that does not receive or need conscious thought. — Another automatic response by the nervous system is the reflex. With muscle tension, a Golgi tendon reflex operates as follows: The output of the Ib inhibitory interneurons are flexible because they receive inputs from golgi tendon organs, muscle spindles, cutaneous receptors, joint receptors, and different descending pathways. It lies at the origins and insertion of skeletal muscle fibers into the tendons of skeletal muscle. Upper motor neurons (UMNs) is a term introduced by William Gowers in 1886. If you want to know about stretching, flexibility or sports injury management, Brad Walker is the go-to-guy. Group A nerve fibers are one of the three classes of nerve fiber as generally classified by Erlanger and Gasser.
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