1.  Development of cognitive disorders

2.  Decline mental function

3.  Impairment that causes problems in social, personal and occupational functions

4.  Memory impairment

5.  Another cognitive disturbances:  agnoisa, aphasia apraxia

6.  Presentation not explained by metabolic and structural abnormalities

7.  Vascular dementia if there are focal neurological signs 

1.  Alzheimer's dementia

2.  Vascular dementia

3.  Alzheimer's and vacular mix dementia

4.  Lewy body demenia vs. Parkinsons

5.  Frontal temporal dementia

6.  HIV related 

1.  Head trauma

2.  ALOH related thimine deficency, Korsaroff's syndrome or psychosis

3.  Wernicke's encephalopathy 

Actue confusional state

Metabolic encephalopathy

Acute brain failure

Acute brain syndrome

Toxic psychosis 

1.  Disturbances of consciousness (Mental status exam)

2.  Reduce ability to to shift, sustain or focus attention or awareness

3.  Metabolic or CSF abnormality

4.  Waxing and Waning:  normal one sec and then sec they are not acting appropiate

5.  Dilapidation of congition:  fall asleep at unapporiate times, not w/ it

6.  Psychotic features:  hallucinations & visual illusions 

1.  ALOH w/draw

2.  Intoxication

3.  Thiamine deficency

4.  Organ failure:  heart, renal & hepatic

5.  primary CNS process:  Post trauma, stroke 

Dementia or mood, personality, psychoitic

Can be due to endocrinopathies especially hypo and hyperthyroidism

B12 deficiency