Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.

Last updated: Jul 18th, 2025

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The vastus medialis muscle is one of the quadriceps femoris muscle's four muscle divisions. It occupies the sides and front of the thigh and its function is being the primary extensor of the knee.

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