5 Questions
Which type of reflex involves both Ia and II afferents, g-motor efferents, and supraspinal centers?
Muscle Stretch Reflex
What is the role of increased activity of dynamic g-motor neurons in controlling muscle spindle response?
Enhances the dynamic response of the spindle
What is the basis of Tendon Jerks?
Oppose sudden change in muscle length
What function is associated with the interruption of the Stretch Reflex by cutting the posterior root of a spinal nerve?
Damping function
What is the effect of motor impulses from the higher brain centers on the Stretch Reflex?
Contribute to the servo-assistant function
Study Notes
Reflexes
- The polysynaptic reflex involves both Ia and II afferents, g-motor efferents, and supraspinal centers.
- Increased activity of dynamic g-motor neurons controls muscle spindle response by increasing the sensitivity of the spindle to stretch.
Tendon Jerks
- The basis of Tendon Jerks is the sudden stretching of muscle spindles.
Stretch Reflex
- Interrupting the Stretch Reflex by cutting the posterior root of a spinal nerve results in the loss of muscle tone.
- Motor impulses from the higher brain centers can suppress the Stretch Reflex, allowing for voluntary movement.
Test your knowledge of the motor function and reflexes of the central nervous system with this quiz. Explore topics such as the spinal cord, monosynaptic and polysynaptic reflexes, muscle stretch reflex, and the role of afferent and efferent pathways.
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