I found this in a neurology paper regarding the storing of past events and the projections of future events:

Schizophrenics recalled fewer specific past events and imagined fewer specific future events than did control subjects, but the schizophrenic patients’ deficits were even greater for future than for past events. Interestingly, this reductionin past and future specificity was correlatedwith the extent of the patients’ positive symptoms (delusions and hallucinations), but not with their negative symptoms (suchas blunted affect). Other evidence correlatedpositive symptoms in schizophrenics with problems remembering contextual details, suggesting that the patients’ impairmentson the past and future tasks reflect impairments in accessing contextual details for the purpose of constructing specific simulations of their personal future or past.