Anterior aspect Flashcards
muscles of the quadriceps femoris
- rectus femoris
- vastus lateralis
- vastus medialis
- vastus intermedius
origin of the rectus femoris
two heads - direct & indirect - ILIUM
origin of the vastus lateralis
- proximal end trochanteric line
to - halfway linea aspera
origin of the vastus medialis
- distal part trochanteric line
to - medial lip linea aspera
What is the VMO
distal fibers of the VM arise from the tendon of the adductor magnus and pass almost horizontally
origin of the vastus intermedius
anterior / lateral aspects of the shaft of the femur
The quadriceps tendon is a __________ structure
trilaminar structure
who forms the layers of the quadriceps tendon
anterior layer –> rectus femoris
intermediate layer –> vastus medialis & lateralis
deep layer –> vastus intermedius
what is the angle Q
Q angle is the angle formed by a line drawn from the ASIS to central patella and a second line drawn from central patella to tibial tubercle.
(Because the shaft of the femur has an inclination, the quadriceps muscle does not pull in a direct line with the patellar tendon.)
angle Q for males and females
14 degrees in males and 17 degrees in females
the quadriceps (Q) angle, is accentuated by: (5 items)
- genu valgum
- increased femoral anteversion
- external tibial torsion
- laterally positioned tibial tuberosity
- tight lateral retinaculum
main and secondary function of the quadriceps
1) extend the knee
2) flex the hip
quadriceps innervation
femoral nerve
length patellar tendon
5 cm
what separates the posterior surface of the patellar tendon from the synovial membrane of the joint
infrapatellar pad of fat and, from the tibia, by a bursa
