Which of the following best describes motor equivalence?

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Multiple Choice

Which of the following best describes motor equivalence?

Motor equivalence is the idea that the same outcome can be produced even when the exact movement changes. The body has lots of redundancy—multiple joints and muscles can achieve the same endpoint—so under different conditions or constraints, the nervous system can reorganize how it moves to still reach the goal. The description that fits best says you can achieve the same end goal with different movement patterns because of constraints. For example, you might reach for a cup with a slightly different arm path if you’re standing vs. sitting, when one arm is fatigued, or if you must use your other hand. The key point is the outcome is preserved even though the movements vary. The other ideas imply sticking to one pattern or chasing multiple goals with one pattern, or resisting adaptation, which isn’t what motor equivalence describes.

Motor equivalence is the idea that the same outcome can be produced even when the exact movement changes. The body has lots of redundancy—multiple joints and muscles can achieve the same endpoint—so under different conditions or constraints, the nervous system can reorganize how it moves to still reach the goal.

The description that fits best says you can achieve the same end goal with different movement patterns because of constraints. For example, you might reach for a cup with a slightly different arm path if you’re standing vs. sitting, when one arm is fatigued, or if you must use your other hand. The key point is the outcome is preserved even though the movements vary.

The other ideas imply sticking to one pattern or chasing multiple goals with one pattern, or resisting adaptation, which isn’t what motor equivalence describes.

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