What do spindles detect that informs body position?

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Multiple Choice

What do spindles detect that informs body position?

Explanation:
Muscle spindles are stretch receptors that monitor how long a muscle is and how quickly that length changes, providing the brain with information about limb position in space. This direct sensing of muscle length—and the rate of length change—lets you know where your body parts are without looking. Temperature changes are detected by thermoreceptors, not muscle spindles. Blood oxygenation is monitored by chemoreceptors and related cardiovascular sensors. Pain perception comes from nociceptors signaling tissue damage. So the change in muscle length is what spindles detect to inform body position.

Muscle spindles are stretch receptors that monitor how long a muscle is and how quickly that length changes, providing the brain with information about limb position in space. This direct sensing of muscle length—and the rate of length change—lets you know where your body parts are without looking.

Temperature changes are detected by thermoreceptors, not muscle spindles. Blood oxygenation is monitored by chemoreceptors and related cardiovascular sensors. Pain perception comes from nociceptors signaling tissue damage.

So the change in muscle length is what spindles detect to inform body position.

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