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Flexor Digitorum Superficialis Muscle

Medically reviewed by: Stephanie Curreli, MD, PhD
Last Updated: Jun 26, 2015
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Continued From Above... The flexor digitorum superficialis muscle is a large muscle that runs along the bottom of the forearm from all the bones at the elbow to the four fingers. It serves to flex or curl the fingers. A flexor muscle is one that decreases the angle between two bones, as in bending the arm at the elbow; raising the leg toward the stomach as in kicking a football; or bringing the lower leg up toward the thigh.