The superficial layer of the plantar (bottom) surface of the foot. The major structure you see is the plantar fascia, a fibroelastic tissue that runs the full length of the foot. It stretches when we settle our weight and then wants to recoil back to its resting length
This is the layer lying just beneath the plantar fascia. Beneath this layer, there are yet 2 other layers, each with its own muscles, tendons, connective tissue, nerves, blood and lymphatic vessels. The tissues of each layer contribute to the springs of the bottom of the foot.
