<P> Structural representations are also important . These types of representations are basically mental maps that we have in our minds that correspond exactly to those objects in the world (the intentional content). According to Morgan, structural representations are not the same as mental representations--there is nothing mental about them: plants can have structural representations . </P> <P> There are also internal representations . These types of representations include those that involve future decisions, episodic memories, or any type of projection into the future . </P> <P> In Gualtiero Piccinini's forthcoming work, he discusses topics on natural and nonnatural mental representations . He relies on the natural definition of mental representations given by Grice (1957) where P entails that P. e.g. Those spots mean measles, entails that the patient has measles . Then there are nonnatural representations: P does not entail P. e.g. The 3 rings on the bell of a bus mean the bus is full--the rings on the bell are independent of the fullness of the bus--we could have assigned something else (just as arbitrary) to signify that the bus is full . </P> <P> There are also objective and subjective mental representations . Objective representations are closest to tracking theories--where the brain simply tracks what is in the environment . If there is a blue bird outside my window, the objective representation is that of the blue bird . Subjective representations can vary person - to - person . For example, if I am colorblind, that blue bird outside my window will not appear blue to me since I cannot represent the blueness of blue (i.e. I cannot see the color blue). The relationship between these two types of representation can vary . </P>

The mental representation that a person has of his or her own body is known as