A body state is basically how your body feels. One's body expressions while showcase how they are feeling at the moment. A body map is typically whats happening in the different regions of one's body. For example, when your hungry, your body would react to it by either making grumbling noises, or by causing a achey/ crampy feeling in your abdomen. I personally feel that, feelings are better expressed through body map rather than a body state. This is due to the fact that, your body makes you 'feel' a certain way. The body map 'reacts' afterwards with an 'expression' that may be either negative or positive.