Affects mainly memory
Organic cause
Rapid (definite) onset
Reversible
Acute – Not progressive
Language: slow, often incoherent, & inappropriate
Fluctuating consciousness
Hallucinations not common
Unknown cause
Chronic - Progressive
Hallucinations common
Gradual (indefinite/insidious) onset
Affects mainly attention
Irreversible
Rarely alters consciousness
Language: sometimes difficulty finding the right word
