rectus femoris

Also found in: Dictionary, Thesaurus, Encyclopedia.

rectus femoris

a fusiform muscle of the anterior thigh, one of the four parts of the quadriceps femoris. With the quadriceps group it functions to extend the lower leg. Compare vastus intermedius, vastus lateralis, vastus medialis. See also quadriceps femoris.
enlarge picture
Rectus femoris
The Q-angle.

quadriceps femoris

(commonly known as quads) muscle group on the front of the thigh comprising lateral, intermediate and medial vasti (all contributing to knee extension, with origin from the shaft of the femur) and rectus femoris (contributing also to hip flexion, by its origin from the ilium of the pelvis). Parts of the vasti are inserted into the top and sides of the patella, and contribute tendinous reinforcements to the joint capsule of the knee. The four muscles converge onto the single quadriceps tendon which spans the front of the knee to be inserted as the patellar tendon (ligament) into the tibial tubercle (tuberosity). See also patella, Q(quadriceps)-angle.

rectus femoris

two-headed (straight and reflected) muscle within quadriceps femoris group; lies between iliopsoas and tensor fascia lata superiorly and vastus lateralis and medialis inferiorly, and overlying vastus intermedius
  • origin straight head from anterior inferior iliac spine; reflected head from acetabulum area

  • insertion common patellar tendon, with vasti tendons

  • nerve supply femoral nerve

  • action knee extension and hip flexion

References in periodicals archive ?
Independent crank cycling with increasing load causes a more constant contraction of the biarticular muscles, rectus femoris and biceps femoris, compared to normal crank cycling.
There were significant increases in T2 signal intensity post-intervention for the gluteus maximus, and throughout the muscle portion (proximal, medial, and distal) of the vastus lateralis and rectus femoris muscles.
Another compensation mechanism is the alteration in movement patterns, for example, stooping less and squatting more during a lift, which would increase the rectus femoris activation.
Table 1 Approaches and Associated Internervous and Intermuscular Planes Approach Internervous Intra-and Intermuscular Medial Parapatellar None Vastus medialis obliquus Rectus femoris Midvastus None Vastus medialis obliquus (intramuscular plane) Subvastus None None Lateral ITB (superior gluteal None nerve) Biceps femoris (sciatic nerve) Medial None Gastrocnemius (medial head) Semimembranosus Posterior None Gastrocnemius (medial and lateral heads) ITB, Iliotibial band.
This more than may be due to an avulsion females injury to the AIIS due to excessive muscular activity of the rectus femoris during repetitive knee flexion and hip extension.
Electrodes were attached to the muscle belly of the quadriceps (a), and rectus femoris simulation (b) was performed.
Aizawa[8] reported that the medial cutaneous nerve branches and vastus medialis, vastus intermedius, vastus lateralis, and rectus femoris nerves were arranged medially to laterally, respectively.
KT was applied to vastus medialis, vastus lateralis, and rectus femoris muscles in the KT group.
1) The rectus femoris muscle is the most commonly injured muscle within the quadriceps muscle group because it extends between two joints (hip and knee) and is most vulnerable during kicking games such as soccer.
The activation characteristic of Rectus femoris [Rec femoris] muscle is 35, 36 and 39 and in right leg is 38, 12 and 8 in amplitude for all three cases respectively.
The rectus femoris originates at the front of the ilium, which is part of the pelvis.

Full browser ?