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: May 5th, 2025

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The dorsal expansion (or dorsal hood) is an aponeurosis, or a flattened mass of connective tissue (tendon) over the back of the hand that expands into a hooded shape over the metacarpals.

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