The gastrocnemius is on the posterior, or back, side of the leg. It attaches to the femur and the patella above the tibia, in the top of the area. It also attaches to the Achilles tendon on the ...

Each leg contains five regions. They’re known as the: The upper leg is often called the thigh. It’s the area that runs from the hip to the knee in each leg. The quadriceps are four muscles ...

The main muscle in this area of the leg is the gastrocnemius, which gives the calf a bulging muscular appearance. Some nerves of the sacral plexus innervate this area, namely the superficial ...