Muscle
Vastus intermedius
Deep quadriceps head
High-yield
Deep to rectus femoris; articularis genus splits from it to retract the knee joint capsule. Femoral nerve.
Overview
The deepest quadriceps muscle, lying directly on the femur beneath rectus femoris, extending the knee.
Reference facts
- Origin
Anterior and lateral surfaces of the femoral shaft
- Insertion
Base of the patella and tibial tuberosity via the quadriceps/patellar tendon
- Action
Extends the knee
- Innervation
Femoral nerve (L2, L3, L4)
- Blood supply
Femoral / lateral femoral circumflex arteries