The mechanisms found to underlie provoked confabulations can be applied to spontaneous confabulation mechanisms. Still other theories frame confabulation around the more familiar concept of delusion. However, it has been found that confabulation and amnesia do not necessarily co-occur. Recent models of confabulation have attempted to build upon the link between delusion and confabulation. The most popular theories of confabulation come from the field of neuropsychology or cognitive neuroscience. Schizophrenia is a psychological disorder in which confabulation is sometimes observed. Simple confabulation may result from damage to memory systems in the medial temporal lobe. Other theories use neurocognitive links to explain the process of confabulation. This process of confabulation feeds back into the perceptual process itself. There is evidence to support different cognitive mechanisms for provoked and spontaneous confabulation. This type of confabulation is commonly seen in Korsakoff's syndrome. They also discuss the role of unconscious processes in confabulation. However, not all accounts are so embedded in the neurocognitive aspects of confabulation. Traumatic brain injury (TBI) can also result in confabulation. This is contrary to most forms of confabulation.