Capturing the depth of the light and darker shadows where it hits the most is a great way to see movement shown in the skin on a human body.  I have taken a photograph of my life model and analysed the tones in the skin and the depth where the light is most captured. As I am practicing to be a fine artist I am learning about the bone structure on the human body.  I use a lamp and placed in on her right side to make the light hit the way she was looking. The shadows on the body help me look at the body differently by the depth of the lighting show each indentations.
The way she is looking away from the camera and her head tilted more to her a right side makes your eyes bounce from the lamp to her face and back again analysing the whole of her body and each depth.
 My focal point is the face because the lamp is so bright my eye draws me more the her face which is more detail than the rest.
This photo has help me learnt more about the human figure, where the marks are on the skin and the tones and shape that the human body actually has.