Neurocognitive Disorders I Flashcards
1
Q
describe delirium
A
acute confusional state, acute brain syndrome
- delirium involves:
-
a disturbance in awareness and attention
- awareness is assessed by one’s orientation to the environment
- attention is assessed by one’s ability to direct, focus, sustain and shift attention
-
an additional disturbance in a cognitive domain
- memory, language, thoughts (delusion) and perceptions (hallucinations)
- sudden onset of symptoms (over hrs to a few days) that typically fluctuate during the day
-
evidence for a direct physiological cause
- medical condition, drug intox/withdrawal
-
a disturbance in awareness and attention
2
Q
describe the confusional assessment method chart for delirium
A
3
Q
describe contrast delirium with dementia
A
- dementia = cognitive impairment but with full consciousness
- delirium = reduced level of consciousness
4
Q
describe the pathology of delirium
A
- multiple etiologies (e.g. fever, dehydration)
- widespread brain regions affected
- core deficits in central cholinergic functioning
- deficits in the RAS and its ascending connections
- important for attention and arousal
5
Q
describe risk factors for delirium
A
- non-modifiable: poor health, older age, male gender
- modifiable: immobilization, poor sleep, use of benzos in an ICU
6
Q
describe the course of delirum
A
- symptoms persist until cause is reversed
- resolution typically occurs within 3-7 days
- amnesia for events during delirium is common
- delirium is a poor prognostic sign for long-term survival and results in longer ICU stays
7
Q
describe the treatment for delirium
A
- treat underlying medical condition
- manage associated symptoms (agitation, psychosis)
- use antipsychotics to treat associated symptoms (agitation, psychosis) of most delirium
- use benzodiazepines to treat delirium caused by alcohol withdrawal
8
Q
describe non-pharmacological treatment for delirium
A
- utilize environmental supportive measures
- regulate amount of environmental stimulation
- provide orienting stimuli
- lighting, personal effects, sensory aids
- provide for safety needs
- attendant, bedrails and possibly restraints
9
Q
describe amnesia
A
- significant acquired memory deficit
- caused by a medical condition or the effect of a substance (not from dissociation)
- NOT diagnosed if it occurs in the context of general cognitive decline (i.e. a dementia)
- typically caused by damage to the hippocampus
10
Q
describe a typical profile of amnesia
A
- intact short-term (working) memory
- short-duration retrograde amnesia
- if lengthy retrograde amnesia, there is often a temporal gradient to the memory loss with recent long-term memories (LTMs) more impaired than remote LTMs
- prominent anterograde amnesia
11
Q
describe the treatment of amnesia
A
-
treat underling cause
- B1 deficiency in Korsakoff’s to stop amnesia progression
-
cognitive rehabilitation
- restoration of function: memory exercises to strengthen memory through repetition
-
compensation (e.g. using mnemonics):
- external strategies (non-mental activities such as using lists, calendars, other person)
- internal strategies (mental activities such as acronyms and acrostics)
12
Q
describe dementia
A
- refers to multiple and severe cognitive impairment without impaired consciousness
- is usually progressive and irreversible
- most commonly occurs in the elderly
- note: mild cognitive impairment (MCI) refers to cognitive decline that doesn’t cause impairment in activities of daily living
13
Q
describe Alzheimer’s dementia (AD)
A
- significant memory impairment plus impairment in at least 1 other cognitive domain
- a gradual onset with steadily progressive decline
- exclusion of other causes of the symptoms (stroke)
14
Q
describe the general course of AD
A
- typically onset in late 70s with 10+ year progression:
- early stages: memory deficits (rapid forgetting) and anomia (aka word finding struggle)
-
middle stages:
- further memory and language decline
- visuospaital deficits
- agnosias
- anosognosia = unaware of mental condition
- prosopagnosia = unable to recognize familiar faces
- mood changes, personality changes
- psychosis
- late stages: global aphasia, motor dysfunction, death from opportunistic infxns
15
Q
describe neuropatholgy and neurochemical changes in AD
A
- neuroanatomical:
- cortical atrophy
- hippocampal atrophy
- enlarged ventricles
- neurochemical:
- multiple neurotransmitter deficiencies
- focus has been on loss of cholinergic (ACh) neurons in the nucleus basalis of Meynert due to its role in memory formation