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Muscle Spindles and Reflexes

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What is the function of muscle spindles?

To detect changes in muscle length (correct)

To cause muscle contraction

To detect changes in muscle tension

To maintain muscle strength

What do group Ia afferent fibers detect?

The number of muscle fibers

The velocity of length change (correct)

The tension in the muscle

The length of the muscle fiber

What is the role of α motoneurons in muscle spindle reflexes?

To innervate extrafusal fibers in the homonymous muscle (correct)

To detect changes in muscle length

To maintain muscle spindle sensitivity during contraction

To stimulate group Ia afferent fibers

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Description

Test your knowledge on the neurophysiology of muscle spindles and their role as stretch receptors in correcting changes in muscle length. Learn about muscle spindle reflexes and how they help return muscles to their resting length. Keywords: muscle spindles, stretch receptors, neurophysiology, muscle length, muscle spindle reflexes.