The coordinated activities of the four heads of the quadriceps femoris muscle results in knee
extension. It is still a matter of debate as to whether the different heads of the quadriceps can …

Background: The quadriceps muscle group includes one biarticular (crosses the hip and the
knee) and three monoarticular (crosses the knee only) muscles. The influence of hip and …

PURPOSE: This study attempted to assess if the resisted contraction of medial rotators of the
tibia increases the ratio between the activity of vastus medialis (VM) and vastus lateralis (VL) …

Simple Summary For human movement to occur, the neural system needs to activate
muscles. Muscles then pull the bones that rotate around the joints. As the joint angle for the …

This study determined the effects of a short period of knee isometric training on the
quadriceps muscles accessible to surface electromyography (EMG). For this purpose, a …

Determining how the quadriceps femoris musculotendinous unit functions, according to hip
and knee joint angles, may help with clinical decisions when prescribing knee extension …

The purpose of this study was to compare the neuromuscular activation patterns of the
individual muscles of the quadriceps femoris (QF), including the vastus intermedius (VI) …

ABSTRACT MAFFIULETTI, NA, and R. LEPERS. Quadriceps Femoris Torque and EMG
Activity in Seated versus Supine Position. Med. Sci. Sports Exerc., Vol. 35, No. 9, pp. 1511 …

Previous studies of methods for stimulating the individual muscles composing the
quadriceps femoris have not considered the structural features of a subject's knee joint. In …

We assessed the effect of knee joint angle on the EMG amplitude and frequency of the four
individual muscles in the quadriceps femoris during repetitive fatiguing maximum voluntary …