Aristotele used the term phantasìa to indicate at the same time a process that generates products similar to external objects and another one that creates contents of purely mental origin.
Neuroscience distinguishes the term Fantasia, also called Imagination from the processes of Mental Imagery production. In fact, with the latter we mean the ability of the subject to mentally represent an object without the related stimuli actually being present in the sensorial and perceptual systems (Paivio, 1971; Kosslyn, 1980; Kosslyn,
Ganis, & Thompson, 2006). Instead, fantasy or imagination can be defined as a set of operations and mental activities involved in creative production.