Probing the architecture of the brain in experimentation with afterimages

Although the phenomenon of afterimages is well known its roots may not be properly understood. An afterimage can be experienced by taking a look at a bright object, close one´s eyes, and retain a blur replica of this object. Then, by gently turning one´s head one gets a feeling that afterimages do not follow head´s movements. Whatever the anatomical structures are involved, as long as the whole process is localized inside the head feeling the detachment of afterimages seems unnatural. Dismissing possible sensory inputs brings a conclusion that an autonomous brain is capable to detect changes in absolute position of the body utilizing an outside influx of information. As an immediate outgrowth, the indicated connection of human perception with extracorporeal information processing elucidates the astounding observations of afterimage size variation and the impressive mystery of the “moon illusion”