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The rectus femoris is the anterior thigh compartment's most superficial and nearly vertically oriented muscle. This bipennate structure is a component of the quadriceps muscle complex, one of the knee's most important dynamic stabilizers.[1] The rectus femoris is also known as the "kicking muscle" for its involvement in activities involving forceful knee extension. As in other musculoskeletal structures, many rectus femoris injuries arise from sports activities, trauma, and occupations requiring repetitive movement of this muscle.