Vastus Intermedius Muscle
Origin: Anterior and lateral aspects of the upper two-thirds of the femoral shaft
Insertion: Tibial tuberosity (via patellar ligament), patella
Actions: Extension of the leg at the knee
Innervation: Posterior division of the femoral nerve (L3, L4)
Blood Supply: Femoral artery and branches from the profunda femoris artery
Primary Actions of the Vastus Intermedius
1. Extension of the leg at the knee
Agonists:
- Vastus Lateralis
- Vastus Medialis
- Rectus Femoris
Antagonists:
- Biceps femoris
- Semitendinosus
- Semimembranosus
Tensor fasciae latae assists with extension of the knee through the iliotibial band.
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Muscle Pain Information: The vastus intermedius muscle contributes to pain that centers in the front of the thigh.
An excellent book for those beginning the study of anatomy. Coloring helps memory retention.
For intermediary anatomy students learning skeletal and muscle structure.
For beginning and intermediary anatomy . Muscle overlays on the human body. Excellent visuals!