Homunculus

A homunculus was originally an artistic rendering of a semi-mythical/legendary type of small human beings. It is also defined as a small man or a representation of a very small human. This creature was hypothesized by Daniel Clement Dennet, in his “Cartesian Theater” concept, to exist in our heads and that they facilitate the different aspects of our behaviors. Popularized in the 16th century by alchemists, and then again by 19th century fiction writers, these were reputed to be tiny, but perfectly formed human beings, unlike the dwarves and trolls of legends and fairy tales. In modern usage within the field of psychology and other scientific disciplines the homunculus functions as a memory tool that illustrates and describes humans and their emotions as they relate to the somatosensory and motor cortices. They are generally portrayed as figures that are superimposed on illustrations of the brain.

https://commons.wikimedia.org/wiki/File%3A1421_Sensory_Homunculus.jpg