Dementia Flashcards
what can FAB (frontal-assessment battery) test distinguish between?
Fronto-temporal dementia + Alzheimer’s dementia
Alzheimer’s dementia is…
a progressive degenerative disease of the brain, accounting for the majority of dementia seen in the UK
How is cognitive testing important in the diagnosis of Dementia?
differentiates between the different types of dementia
name 3 cognitive function test and mood disorder scales that can be used
- FAB test = Frontal lobe Assessment Battery
- MMSE = mini mental state examination
- MoCA = Montreal Cognitive assessment
findings on MRI scan in Alzheimer’s dementia
Bilateral atrophy of temporal lobes + generalised atrophy
3 instruments to assess functional symptoms
- activities of daily living questionnaire
- functional activities questionnaire
- bristol functional assessment
2 instruments to assess psychological symptoms
- BRHAVE-AD
- Neuropsychiatric inventatory
1 instrument to assess care-giver strain
MBRC caregiver strain instrument
2 main subtypes of dementia
subcortical + cortical
3 types of cortical Dementia
- Alzheimer’s dementia
- Lewy Body dementia/Parkinson’s dementia
- Fronto-temporal dementia
3 types of Subcortical dementia
- Vascular dementia
- Alcohol related dementia
- Parkinson’s dementia
- Huntington’s dementia
Role of anterior + inferior temporal lobes?
semantic memory
Role of lateral temporal lobe?
Wernicke’s area
Role of medial temporal lobe?
Hippocampus: forming memories + anterograde amnesia
3 features Dementia is marked by?
- Impaired reasoning
- Personality changes
- Memory disorders
most common type of dementia?
Alzheimer’s dementia
2nd most common type of dementia
vascular dementia
Alzhemer’s dementia is more common in males/females
females
Vascular dementia is more common in males/females
males
Lewy Body dementia is more common in males/females
no difference between genders
risk factors for Dementia
- depression in mid-life/later-life
- head injuries in Parkinson’s dementia
- lifestyle factors; smoking, alcohol, exercise, education
what ages are early + late onset Alzheimer’s dementia defined by
early onset = < 65 years old (30-60)
late onset = > 65 years old
3 exclusion criteria for Dementia
- absence of dementia
- symptoms present > 6 months
- Irreversible
3 genes identified for Early onset Alzheimer’s dementia
- Amyloid precursor protein (on chromosome 21)
- Presenilin 1 (on chromosome 14)
- Presenilin 2 (on chromosome 1)
inheritance pattern of the genes in Alzheimer’s dementia, and what are these genes involved in?
autosomal dominant
metabolism of amyloid protein
gene identified for Late onset Alzheimer’s dementia
ApoE = Apolipoprotein E
occurs in 3 different alleles
pathophysiology of Alzhemer’s dementia
loss of anticholinergic activity
2 characteristic pathological changes in AD
- Beta amyloid plaques between neurones
2. Neurofibrillary tangles of hypophosphorylated tau inside neurones
3 A’s of cortical dysfunction
A - Aphasia
A - Agnosia
A - Apraxia
gene linked to Vascular dementia in rare cases?
NOTCH3 on chromosome 19
7 risk factors for VD
- obesity
- smoking
- previous stroke
- AF
- hx MI
- raised cholesterol
- DM
symptoms of small vessel disease affecting the sub-cortex
- personality changes
- thought slowness
- affective symptoms
- executive skills e.g planning, decisions
what are Lewy bodies
neuronal inclusions composed of proteins aggregated with ubiquitin + alpha-synuclein
location of lewy bodies in lewy body dementia
substantia nigra
medx avoided in Lewy Body dementia
neuroleptics
3 features of Lewy Body dementia
- progressive cognitive impairment
- Parkinsonism
- visual hallucinations
scan that can be used to diagnose Lewy body dementia
DaT scan
pathophysiology of fronto-temporal dementia
intracellular clumps of protein: Tau + TDP-43
features of frontotemporal dementia and the causative area:
Atrophy of anterior temporal lobe = agnosia + dysphasia
Atrophy of frontal lobe = behavioural problems, emotional control, planning, motor function
3 genes associated with Frontotemporal dementia
C90RF72 - chromosome 9 - linked to MND
MAPT - chromosome 17: gene for protein Tau
GRN - chromosome 17
1st line management of AD
AchE-I inhibitors
- rivastigmine
- donepezil
- Galantamine
2nd line management of AD
Memantine
NDMA receptor antagonist
what are BPSD’s
Behavioural and psycological symptoms of dementia
investigations to do prior to starting either cholinesterase inhibitors or NDMA receptor antagonists
ECG
U + E
cholinesterase inhibitors and contraindicated for:
those with
- bradykinesia
- LBBB
- prolonged QTc interval
importance of checking U + E before starting Memantine
can cause renal failure
cholinesterase inhibitors used in caution in;
- gastric ulcers
- seizures
6 therapy managements for BPSDs
1) cognitive stimulation therapy
2) CBT
3) Reminiscence therapy
4) Aromatherapy
5) Sensory stimulation
6) Music therapy
when to offer antipsychotics to patients with dementia
- at risk to harming themselves
- experiencing agitation, hallucinations, delusions that are causing severe distress
pathological feature associated with Lewy Body Dementia
Alpha Synuclien
which cognitive function test is an extension of the MMSE
ACE - III
5 cognitive domains of ACE-III
- attention/orientation
- memory
- language
- verbal fluency
- visuospatial skills
list of BPSDs
- hallucinations
- delusions
- anxiety
- agitation + aggressive behaviour
- apathy
- depressioon
- irritability
Mild diagnosis of Dementia
- MMSE
- ADL
MMSE 20-24
Able to manage independant life
Moderate diagnosis of Dementia
- MMSE
- ADL
MMSE 10-20
Need help with ADLs
Severe diagnosis of Dementia
MMSE < 10
Completely dependant for ADLs
4 options for 24 hour care
- General residential home
- EMI residential home
- General nursing home
- EMI nursing home