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.
when the muscle gets stretched , muscle spindle is stimulated and it sends proprioceptive impulses via sensory afferent fibers in posterior root to anterior horn cells of the spinal cord. Motor impulses from anterior horn cells via motor efferent fibers in anterior root to muscle.
Reflex actions are actions you do without thinking, although the information does travel to the spinal cord, to protect yourself from immediate danger or harm. Example:coughing clears your windpipe, shivering keeps you warm. The pupils get smaller in bright light to protect the retina. Blinking helps to keep the eye clear and moist. This happens automatically even when there is no foreign body to get rid off.
A stretch reflex occurs in the muscles. When a muscle is stretched, the muscle spindles are activated and they send information to the brain that then responds telling the muscle to contract. This is a protective mechanism in the body that prevents muscles from being overstretched. When a muscle is rapidly stretched, elastic energy is stored in the muscle and the stretch reflex causes a quick contraction that can be used in sports/activities requiring a high burst of energy and a quick muscle contraction.
An example of a stretch reflex being used is a vertical jump. Before we jump, we squat down and bend at the knees. This stretches the quads, activating the muscle spindles. The quads then react by contracting which allows us to jump higher.
knee jerk aka patellar reflex is an example of a stretch reflex
spinal reflex
unce
The Achilles reflex is also known as the ankle jerk reflex. If the Achilles tendon is tapped, the foot should jerk towards its plantar surface.
Micturation is what we commonally call urination. There are various stretch activated receptors within the bladder and in the adjoining sphincter that participate in the reflex. The bladder has to disallow backflow and coordinate the contraction of the bladder with the relaxation of the terminal sphincter. This is done through both voluntary control of the musculature as well via sympathetic and parasympathetic reflexes.
knee jerk aka patellar reflex is an example of a stretch reflex
differentiate between a dynamic stretch reflex and a static stretch reflex
It is a disynaptic reflex
spinal reflex
knee jerk aka patellar reflex is an example of a stretch reflex
Yes, you may still have a stretch reflex with a cervical nerve injury.
Patellar reflex is an involuntary, deep tendon and myotatic reflex
No, those are two different reflexes.
knee jerk reflex
one
stretch
What monitors muscle length and sends an impulse to the spinal cord to indicate the stretch reflex