The purpose of this case series was to quantify the effectiveness of different compensatory strategies used by individuals with muscle weakness to produce knee extension during the stance phase gait. Subjects were three males with less than anti-gravity strength in the quadriceps femoris and a variable pattern of weakness elsewhere in the lower extremity. They walked independently at a self-selected speed without assistive devices. Gait analysis of the pelvis and bilateral lower extremity segments was performed with a six-camera, two force platform motion capture system.
Introduction. The ability to extend the knee is critical to prevent limb collapse during gait. In normal walking, Methods. Previously collected data were reviewed from patients with quadriceps femoris weakness who had been referred Results. Temporal-spatial gait variables are reported in Table 1. All three subjects with weakness walked slower