Psychiatry Flashcards
Name endocrinological causes of dementia
- Hypothyroidism, Hyperparathyroidism, Cushing’s and Addisons
Name vitamin deficiency that causes dementia
B12, folate and thiamine
Metabolic causes of demenntia
- Hypoglycaemia, calcium, magnesium and electrolyte imbalance
Clinical features of dementia
- Memory impairment
- Personality changes
- Fatigue
- Apathy
- Hallucinations and paranoid delusions
- Sundowner syndrome
- Seizures
- Catastrophic Reaction
- Pathological emotion
Differentials of dementia
- Delirium
- Depression
- Learning Disability
- Normal ageing
Investigations for Dementia
- FBC; LFT; U&E; glucose; erythrocyte sedimentation rate (ESR); thyroid-stimulating hormone (TSH); calcium; magnesium; phosphate; Venereal Disease Research Laboratory (VDRL) test for syphilis; HIV; vitamin B12 and folate; C-reactive protein; blood culture; LP; EEG; chest X-ray (CXR); ECG; CT (optima and axial protocol); MRI; SPECT
Management of dementia
- Assessment
- Cognitive enhancement (Ach esterase inhibitors - rivastigmine), antioxidants (selegiline)
- Treat psychosis
- Treat depression
- Treat medical illness
- Psychological support to patient and care-givers
- Functional management: maximise mobility, encourage indépendance
- Social management
What is catastrophic reaction
Happens when patients with dementia are asked to perform tasks that they are struggling with causing sudden anger, agitation and violence
What characterises fronts-temporal dementia
- Frontal lobe so personality changes are early
2. Language impairment
Onset of front-temporal dementia
Early-onset
What would a CT show for fronts-temporal dementia
- Atrophy of fronto-temporal cortex
What would a SPECT show for fronto-temporal dementia
fronto-temporal metabolism
What part of the cortex does alzheimer’s affect
Posterior-parietal
What characterises alzheimer’s
- Early memory and cognitive deficits
personality changes are later as frontal lobe starts to atrophy
Most common cause of dementia
Alzheimer’s
What can protect against Alzheimer’s
Smoking
Oestrogen
NSAIDs
What causes Alzheimer’s
- Amyloid plaques (beta-amyloid deposits)
2. Neurofibrillary tangles
Clinical symptoms of alzheimer’s (related to time)
Early symptoms: Memory problems, ADL issues, spatial dysfunction and changes to behaviour (e.g. irritability)
Middle: Intellectual and personality deterioration (aphasia, apraxia so struggling to dress) and agnosia (can’t recognise own body parts)
Impaired visuospatial skills
Late: Fully dependant with physical deterioration, incontinence, weight loss, primitive reflexes and extrapyramidal signs
Psychiatric symptoms of alzheimer’s
- Paranoid Delusions, auditory and visual hallucinations, depression
Factors for poor prognosis of alzheimer’s
- Sveerity of presentation
- Male
- <65
What assessment is used for Alzheimer’s
IQCODE
What imaging would be used for alzheimer’s
- CT: Cortical atrophy
- MRI: Atrophy of grey matter (hippocampus and amygdala)
- PET: 20-30% reduction in oxygen
How often should patients be reviewed if they are put on treatment for alzheimer’s
Every 6 months
MMSE should be above 12 to continue treatment
What drugs are given to patients with Alzheimer’s
- Donepezil or Rivastigmine
2. Memantine