Summary
Origins
- Anterior and lateral surfaces of the shaft of the 🦴 femur
Insertions
- Quadriceps tendon to the patella and via the patellar ligament to the tibial tuberosity
Actions
- Extends the knee
The vastus intermedius is the deep portion of the quadriceps, blanketing the anterior femur beneath the rectus femoris. Its fibers drive knee extension and feed into the quadriceps tendon, smoothing the thigh's front contour.