Other Names
- Thigh (Front)
- Quads
Heads
- Rectus Femoris
- Vastus Lateralis (Externus)
- Vastus Intermedius
- Vastus Medialis (Internus)
Movement
- Extension [1, 2, 3, 4 ]
- Flexion [1 ]
Attachments
- Ilium [1 ]
- Iliac Spine (Anterior Inferior)
- Femur
- Lateral Surface [2 ]
- Anterior Surface [3 ]
- Medial Surface [4 ]
- Tibia [1, 2, 3, 4 ]
- Tuberosity
- Patellar Tendon
- Patella
- Patellar Tendon
- Tuberosity
Related Muscles
Comments
The biarticulate rectus femoris [1 ] enters passive insufficiency through the completion of knee flexion when the hips are more extended or through the completion of hip extension when the knees are more flexed. The biarticulate rectus femoris [1 ] enters active insufficiency through the completion of knee extension when the hips are more flexed (other heads of the quadriceps [2, 3, 4 ] become more active) or through the completion of hip flexion when the knees are more extended (other hip flexors become more active).
See vastus medialis weakness [4]. Also, see pulley-like arrangements in body.