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physical
chemical
environmental
, primary dementia
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- the disorder itself is the major sign of some organic brain disease not
directly related to any other organic illness ( alzheimers)
causes of vascular dementia
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- hypertension
- cerebral emboli
- cerebral thrombosis
symptoms of delirium
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- difficulty sustaining and shifting attention
- extreme distractibility
- disorganized thinking
- speech that is rambling, irrelevant, pressured, and incoherent
- impaired reasoning ability and goal- directed behaviour
- disorentation to time and place
- impairment of recent memory (short term)
- misperceptions about the environment, including illusions and
hallucinations
- disturbance in level of consciousness, with interruption of sleep wake
cycle
- psychomotor activity that fluctuates between agitation and restlessness