Objective: To investigate atrophy and weakness of the quadriceps femoris muscle group in patients with PFPS using measures of cross-sectional area and peak extension torque. Methods: A total of 57 ...

Your quads, or quadriceps femoris muscle group, are four separate muscles that run along the front of your thigh between your hip and your knee. It's one of the largest (and strongest) muscle ...

He also noticed a painful lump appearing in his thigh during quadriceps contraction. Physical examination showed loss of the normal contour of the rectus femoris. During quadriceps contraction, the ...