<P> Piaget posited that perceptions depend on the world view of a person . The world view is the result of arranging perceptions into existing imagery by imagination . Piaget cites the example of a child saying that the moon is following her when she walks around the village at night . Like this, perceptions are integrated into the world view to make sense . Imagination is needed to make sense of perceptions . </P> <P> Imagination is different from belief because the subject understands that what is personally invented by the mind does not necessarily affect the course of action taken in the apparently shared world, while beliefs are part of what one holds as truths about both the shared and personal worlds . The play of imagination, apart from the obvious limitations (e.g. of avoiding explicit self - contradiction), is conditioned only by the general trend of the mind at a given moment . Belief, on the other hand, is immediately related to practical activity: it is perfectly possible to imagine oneself a millionaire, but unless one believes it one does not, therefore, act as such . Belief endeavors to conform to the subject's experienced conditions or faith in the possibility of those conditions; whereas imagination as such is specifically free . The dividing line between imagination and belief varies widely in different stages of technological development . Thus in more extreme cases, someone from a primitive culture who ill frames an ideal reconstruction of the causes of his illness, and attributes it to the hostile magic of an enemy based on faith and tradition rather than science . In ignorance of the science of pathology the subject is satisfied with this explanation, and actually believes in it, sometimes to the point of death, due to what is known as the nocebo effect . It follows that the learned distinction between imagination and belief depends in practice on religion, tradition, and culture . </P> <P> A study using fMRI while subjects were asked to imagine precise visual figures, to mentally disassemble them, or mentally blend them, showed activity in the occipital, frontoparietal, posterior parietal, precuneus, and dorsolateral prefrontal regions of the subject's brains . </P> <P> The world as experienced is an interpretation of data arriving from the senses; as such, it is perceived as real by contrast to most thoughts and imaginings . Users of hallucinogenic drugs are said to have a heightened imagination . This difference is only one of degree and can be altered by several historic causes, namely changes to brain chemistry, hypnosis or other altered states of consciousness, meditation, many hallucinogenic drugs, and electricity applied directly to specific parts of the brain . The difference between imagined and perceived reality can be proven by psychosis . Many mental illnesses can be attributed to this inability to distinguish between the sensed and the internally created worlds . Some cultures and traditions even view the apparently shared world as an illusion of the mind as with the Buddhist maya, or go to the opposite extreme and accept the imagined and dreamed realms as of equal validity to the apparently shared world as the Australian Aborigines do with their concept of dreamtime . </P>

Where does imagination come from in the brain
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