Sunday, May 6, 2012

04 Modeling Nº 44

The foot is a fairly complicated part of the body, and it has taken me awhile to figure it out. In the diagrams below, I have sketched some of the major things to know about the foot, to help with modeling it. Like anything else, if it is broken down into smaller parts, it becomes easier to understand.

Each foot, when bearing weight, distributes the weight in a triangle composed of the heel (lavender), and the two pads behind the toes (pink and bluegreen). There are two long arches (light gray and dark gray) between the pads and the heel. One is a high arch (dark gray), on the inside of the foot. The other is a low arch (light gray), on the outside of the foot. The ankle bones (yellow) are the terminal ends of the lower leg bones. The inside ankle is higher and closer to the front of the foot. The outside ankle is lower and closer to the back of the foot.

The basic shapes of the foot. The foot is wider in the front, across the pads, just behind the toes, and narrower in back, at the heel. The heel is about one half the width of the widest part of the foot. The widest part of the foot is about one-half head length wide. The foot is about one head length from the back of the heel to the first joint of the big toe. Therefore, the total length of the foot is a little longer than one head length. From the side, the foot has a basic triangular shape. From the back, the heel is more or less pear shaped.

The toes form a curve. The high arch is on the inside of the foot, and the low arch is on the outside of the foot. The outside of the foot is mostly in contact with the ground when standing. There is a small arch just behind the big toe pad. There is also an arch curvature of the foot when looking at it in the front view. The ankle bones are jointed on a ball, which allow the foot to be pivoted up and down. The outside ankle is lower and further back than the inside ankle bone. The inside ankle bone is the terminal end of the shin bone in the lower leg. 

Everything is interconnected. The various toe bones, which form the high and low arches are connected to the ball joint which rests on the heel bone. The ankle bones, which are the ends of the lower leg bones, rotate on the ball joint of the foot. All of the bones of the foot form arches, which allow the foot to have a springy step, and keep balance when standing, walking, and running. There are all sorts of tendons in the foot. The tendon that has a very pronounced form is the one that connects the heel bone with the leg muscles. It is called the Achilles tendon. The other tendons, on top of the foot connect to the toes. The toes have curved toenails, which have a definite step up from the nail, to the toe joints.

This is probably more than I need to know to model a doll foot in oil-clay. All of the above diagrams are not drawn to scale, and were drawn using the Kolourpaint graphics program, and a mouse. I referred to the life cast wax foot I have in my studio when I made the diagrams.

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