GLOSSARY

The vastus lateralis is the largest and strongest muscle of the quadriceps group, forming the lateral side of the thigh.

Attachments and Innervation

• Origin: the greater trochanter, the linea aspera, and the lateral surface of the femur.
• Insertion: the lateral border of the patella and, via the patellar tendon, the tibial tuberosity.
• Nerve: the femoral nerve (L2–L4).

Actions

• Knee extension: the largest force contribution within the quadriceps.
• Lateral pull on the patella: must be balanced by the vastus medialis.

Relevance to Sport