Quadriceps Femoris and Hamstring Muscle Function in a Person With an Unstable Knee

Quadriceps femoris muscle fatigue in patients with knee osteoarthritis

The purpose of this study was to characterize quadriceps femoris muscle fatigue of both lower extremities in patients with knee osteoarthritis (OA). Sixty-two subjects (mean age 68.2 years, standard deviation [SD] ± 7.9 years) with knee OA participated in the study. Significantly higher knee pain was reported in the involved knee than in the contralateral knee, as determined by a visual analog ...

Stimulation Frequency in Human Quadriceps Femoris Muscle

Muscle-specific atrophy of the quadriceps femoris with aging.

We examined the size of the four muscles of the quadriceps femoris in young and old men and women to assess whether the vastus lateralis is an appropriate surrogate for the quadriceps femoris in human studies of aging skeletal muscle. Ten young (24 +/- 2 yr) and ten old (79 +/- 7 yr) sedentary individuals underwent magnetic resonance imaging of the quadriceps femoris after 60 min of supine rest...

Injection-induced contracture of the quadriceps femoris muscle in children.

Contracture of the quadriceps femoris in children leads to limited knee flexion.1 Fairbank and Barret2 and Hnevkovsky3 believed the contracture was congenital or secondary to progressive idiopathic fibrosis of the vastus intermedius. Lloyd-Roberts and Thomas4 stipulated that multiple injections into the thigh might cause the contracture. Proximal release in the early stage and distal release in...

Physical function and properties of quadriceps femoris muscle after bariatric surgery and subsequent weight loss.

OBJECTIVES To investigate the effects of bariatric surgery-induced weight loss on physical function, the properties of quadriceps femoris muscle (QFM), and the subjective disabilities of the subjects with excessive weight. METHODS Thirteen female and three male subjects were studied before and 8.8 months after Roux-en-Y gastric bypass (RYGP) operation. The health-related quality of life (RAND...