which is the receptor for the stretch reflex
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What is the receptor in the reflex arc of a stretch reflex? Answered by The Community. Making the world better, one answer at a time. The receptor in the reflex arc of a stretch reflex are 'muscle spindles' which are spindle shaped receptors distributed throughout the belly of the muscle.or example the knee jerk reflex is a monosynaptic reflex: 1. The patellar tendon is stretched. 2. The afferent neuron (which has stretch sensors) send a signal up to the spinal cord. 3. In the spinal cord at the synapse.
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- Stretch or Deep Tendon Reflexes - Upper extremity. A brisk tap to the muscle tendon using a reflex hammer produces a stretch to the muscle that results in a reflex contraction of the muscle. The muscles tested, segmental level, and grading of DTR's are listed below. Levels for DTR's.
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- Thus, when a muscle spindle is stretched and the stretch reflex is activated, the opposing muscle group must be inhibited to prevent it from working against the resulting contraction of the homonymous muscle (Figure 2.2). This inhibition is accomplished by an inhibitory interneuron in the spinal cord.ust as in the stretch reflex, the autogenic inhibition reflex must coordinate the activity of the extensor and flexor muscle groups (Figure 2.4). The Ib afferent fiber bifurcates in the spinal cord.
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Reciprocal inhibition Thus, when a muscle spindle is stretched and the stretch reflex is activated, the opposing muscle group must be inhibited to prevent it from working against the resulting contraction of the homonymous muscle (Figure 2.2). This inhibition is accomplished by an inhibitory interneuron in the spinal cord.
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Structure and Function: Sensory Receptors Proprioceptors. Proprioceptors are types of internal sensory receptors that monitor the degree of stretch of muscles and tendons around the body. This information gives us our sense of balance and our awareness of the position of various parts of the body in relation to each other.
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- The Stretch Reflex : (See Figure 13.15). The stretch reflex in its simplest form involves only 2 neurons, and is therefore sometimes called a 2-neuron reflex. The two neurons are a sensory and a motor neuron. The sensory neuron is stimulated by stretch (extension) of a muscle.Stretch of a muscle normally happens when its antagonist contracts, or artificially when its tendon is stretched, as in the knee jerk reflex.Muscles contain receptors called muscle spindles. (See Figure 13.13) These receptors respond to the muscles's stretch.he two neurons are a sensory and a motor neuron. The sensory neuron is stimulated by stretch (extension) of a muscle. Stretch of a muscle normally happens when its antagonist contracts, or artificially when its tendon is stretched, as in the knee jerk reflex.
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- Two types of position and velocity receptors are found in hairy skin. Type I receptors are the peripheral ends of type A beta fibers associated with Merkel's disks. They are stimulated by indentation of the skin and respond with an irregular discharge. They show a good velocity response but a smaller position response.
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Stretch reflex Spinal reflexes include the stretch reflex, the Golgi tendon reflex, the crossed extensor reflex, and the withdrawal reflex. Stretch Reflex. The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. This reflex has the shortest latency of all spinal reflexes. It is a monosynaptic reflex that provides automatic regulation of skeletal muscle length.
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- Examination of myotatic (deep tendon) reflexes The muscle stretch (myotatic) reflex is a simple reflex, with the receptor neuron having direct connections to the muscle spindle apparatus in the muscle and with the alpha motor neurons in the central nervous system that send axons back to that muscle (Figure 8-1).
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Stretch reflex The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length.When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.here are several theories as to what may trigger gamma motoneurons to increase the reflex's sensitivity. For example, alpha-gamma co-activation might keep the spindles taut when a muscle is contracted, preserving stretch reflex sensitivity even as the muscle fibers become shorter.
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Baroreflex Baroreceptors are stretch receptors and respond to the pressure induced stretching of the blood vessel in which they are found. Baroreflex induced changes in blood pressure are mediated by both branches of the autonomic nervous system – that is the parasympathetic and sympathetic nerves.
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The Babinski reflex hammer The Babinski reflex hammer. Douglas J. Lanska, MD, MS, MSPH, Tomah, WI. Nineteenth-century recommendations for eliciting muscle stretch reflexes included tapping the tendons with fingers, the ulnar surface of the hand, lightweight percussion hammers, the handles of such hammers, or monaural stethoscopes.
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- Examination of myotatic (deep tendon) reflexes. The muscle stretch (myotatic) reflex is a simple reflex, with the receptor neuron having direct connections to the muscle spindle apparatus in the muscle and with the alpha motor neurons in the central nervous system that send axons back to that muscle (Figure 8-1).
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What is Rectum, Rectum Function with Parts Stretch receptors are located in the wall of rectum which sense the dilation of the gut and send signal to the nervous system (brain) where these are processed and a response is generated that induces the need for the elimination of waste materials passing through anal canal and getting out through anal verge.tretch receptors are located in the wall of rectum which sense the dilation of the gut and send signal to the nervous system (brain) where these are processed and a response is generated that induces the need for the elimination of waste materials passing through anal canal and getting out through anal verge.
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Chapter 8 - Reflex evaluation Examination of myotatic (deep tendon) reflexes. The muscle stretch (myotatic) reflex is a simple reflex, with the receptor neuron having direct connections to the muscle spindle apparatus in the muscle and with the alpha motor neurons in the central nervous system that send axons back to that muscle (Figure 8-1).xamination of myotatic (deep tendon) reflexes. The muscle stretch (myotatic) reflex is a simple reflex, with the receptor neuron having direct connections to the muscle spindle apparatus in the muscle and with the alpha motor neurons in the central nervous system that send axons back to that muscle (Figure 8-1).
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Stretch reflex The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length. When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.
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- References. 1  Widdicombe JG: Afferent receptors in the airways and cough. 2  Shannon R, Baekey DM, Morris KF, Lindsey BG: Ventrolateral medullary respiratory network and a model of cough motor pattern generation. 3  Mazzone SB: Sensory regulation of the cough reflex. 4  Mazzone SB, Canning BJ, Widdicombe J: Sensory pathways for the cough reflex.
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- Ruffini corpuscles in skin are considered to be skin stretch sensitive receptors of the discriminative touch system. They also work with the proprioceptors in joints and muscles to indicate the position and movement of body parts.he sensitivity of the receptors to specific stimuli (e.g., touch verses muscle stretch) is determined by the location of the receptor and by the non-neural tissue surrounding the 1° afferent terminal (Figure 2.6). Figure 2.6. The locations of cutaneous (somatosensory) receptors in hairy and non-hairy (glabrous) skin.
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Stretch reflex Stretch reflex. The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length. When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.
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- The stretch and tendon reflexes complement one another. When one muscle is stretching and stimulating the stretch reflex, its antagonist is contracting and stimulating the tendon reflex. The two reflexes cause the same responses thus enhancing one another.he stretch and tendon reflexes complement one another. When one muscle is stretching and stimulating the stretch reflex, its antagonist is contracting and stimulating the tendon reflex. The two reflexes cause the same responses thus enhancing one another.
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Muscle spindle Muscle spindles are sensory receptors within the belly of a muscle that primarily detect changes in the length of this muscle.They convey length information to the central nervous system via sensory neurons.This information can be processed by the brain to determine the position of body parts.he spindle is a stretch receptor with its own motor supply consisting of several intrafusal muscle fibres. The sensory endings of a primary (group Ia) afferent and a secondary (group II) afferent coil around the non-contractile central portions of the intrafusal fibres.
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Stretch reflex The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length.When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.he reflex functions to maintain the muscle at a constant length. Gamma motoneurons regulate how sensitive the stretch reflex is by tightening or relaxing the fibers within the spindle. There are several theories as to what may trigger gamma motoneurons to increase the reflex's sensitivity.
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Stretch Reflex Clinical testing of reflexes. 1  Jaw jerk reflex (CN V- Mandibular division of the Trigeminal nerve): It is a stretch reflex used to test the cranial nerve V. The mandible is struck just below the lower lips while the mouth is slightly open. This causes the masseter muscle to contract, and the jaw to shut.
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- Because the Ia afferent fibers synapse directly onto the proximal dendrites and soma of the motor neuron in the spinal cord, the tendon reflex is monosynaptic and may be referred to as a phasic stretch reflex, muscle stretch reflex, or deep tendon reflex.
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- The receptor in the reflex arc of a stretch reflex are 'muscle spindles' which are spindle shaped receptors distributed throughout the belly of the muscle.
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Understanding the Stretch Reflex (or Myotatic Reflex) Another example of the stretch reflex is the knee-jerk test performed by physicians. When the patellar tendon is tapped with a small hammer, or other device, it causes a slight stretch in the tendon, and consequently the quadriceps muscles.he stretch reflex can be activated by external forces (such as a load placed on the muscle) or internal forces (the motor neurons being stimulated from within.) An example of the former is a person holding an empty tray in their outstretched arm and then having a plate of food set on it.