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In page Neuropil:

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It has been shown that a certain protein synaptophysin[1] is lost in people with schizophrenia that causes dendrites and spines to deteriorate in the dorsolateral prefrontal cortex, a part of the neocortex, which plays a key role in information processing, attention, memory, orderly thinking and planning which are all functions that deteriorate in people with schizophrenia. The deterioration of the neuropil in this cortex has been proposed as a contributor to schizophrenia pathophysiology.[citation needed]