0
The rectus femoris becomes active in a leg extension because one of the actions of the rectus femoris is hip extension, as well as knee extension. The rectus femoris crosses both the hip and knee on the anterior side of the body. When the leg is extended it is one of the primary movers, whether it be straight leg extension, in which case it is the rectus femoris, illium and psoas muscles. In knee extension the rectus femoris works in conjunction with the other 3 quadriceps. However, in the case of a seated leg extension the rectus femois is less active, due to it already being shortened for the hip extension.
What else can I help you with?
What does rectus femoris do?
Flexion of the Hip and extension of the Knee
What is the synergist in a knee extension?
Rectus femoris Vastus medialis Vastus intermedialis Vastus lateralis Sartorius
Why do some call the rectus femoris the vastus femoris?
the real name is rectus femoris, the vastus muscles are the ones laterally, medially and intermedius, there is no vastus femoris. the Quadriceps Femoris are: rectus femoris, vastus lateralis, vastus medialis and vastus intermedius.
What sport is a rectus femoris used in?
all sports. A "rectus femoris" is a part of your body
What is one of the quadricep muscle?
Rectus femoris and the three vasti
Where is rectus femoris muscle found?
The rectus femoris is found in the middle of the front of the thigh.
Which quadricep muscle has an additional action and what is it?
It is the rectus femoris, which along with the action of knee extension, it also flexes the hip
What muscles is the agonist in hip extension?
Hip Extension the agonist would be Glutues Maximus
Is the rectus femoris anterior to the vastus intermedius?
Yes the rectus femoris is anterior to the vastus intermedius, vastus intermedius is a deep muscle that we need to cut the rectus femoris in order to see it.
What is the scientific name for rectus femoris?
This is the scientific name. Rectus means to be upright, Femoris means pertaining to the femur.
What is the function of the rectus femoris muscle?
Rectus Femoris is a quadricep muscle located in the anterior thigh, on top of the vastus intermedius (another quadricep). All of the quadriceps insert to the patella, and the tibial tuberosity via the patellar ligament. Together they are responsible for extension of the knee. Rectus Femoris is the only quadricep that also crosses the hip joint (acetabulofemoral joint) and attaches to the AIIS (anterior inferior iliac spine). Because of this, Rectus Femoris also assists in flexion of the hip.
What acts as an antagonist to the rectus femoris?
The primary antagonist to the rectus femoris is the biceps femoris, a muscle of the hamstring group. When the rectus femoris contracts to flex the hip and extend the knee, the biceps femoris acts to flex the knee and extend the hip, helping to create balanced movement.
