What is the action of the Vastus Lateralis?

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Multiple Choice

What is the action of the Vastus Lateralis?

Explanation:
The Vastus Lateralis helps straighten the knee. It’s one of the quadriceps muscles on the front of the thigh, and its main job is to extend the knee by pulling on the quadriceps tendon, which passes across the patella to the tibia. This action is what raises the leg straight, such as when standing up from a chair, kicking, or climbing stairs. It does not flex the knee, abduct the thigh, or invert the foot—the latter movements involve different muscles that act at the hip or ankle, not the quadriceps.

The Vastus Lateralis helps straighten the knee. It’s one of the quadriceps muscles on the front of the thigh, and its main job is to extend the knee by pulling on the quadriceps tendon, which passes across the patella to the tibia. This action is what raises the leg straight, such as when standing up from a chair, kicking, or climbing stairs. It does not flex the knee, abduct the thigh, or invert the foot—the latter movements involve different muscles that act at the hip or ankle, not the quadriceps.

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