Old Age Psychiatry 1.2 Flashcards
What happens in Parkinsons?
Degeneration of subcortical structures: substantia nigra, caudate, putamen and globus pallidus
What type of disease is Parkinsons?
Subcortical degenerative diseases
What do Subcortical diseases effect?
Movement
Mood
Cognition
Which patients with Parkinsons are more likely to ave cognitive sx?
Those with late onset (>70)
How many patients with Parkinsons go on to develop dementia?
10%
What type of deficits are less severe in patients with LBD and Parkinsons vs Alzheimers?
Visual and verbal memory deficits
What type of deficits are more severe in LBD and Parkinsons vs Alzheimers?
Executive dysfunction:
planning, reasoning, sequencing
What neuropsychological impairments are noted in Parkinsons even if there is no cognitive impairment?
Visuospatial tasks
Impact of Parkinsons dementia?
Impairs QoL
Exacerbates carers distress
Increases likelihood if residential care
Doubles mortality
Most common SE of Levodopa or dopamine agonists
Visual hallucinations with insight
Treatment of psychosis secondary to medications
Reduce dose of levodopa or dopamine agonist
Clozapine/Quetiapine
Risk factors for developing psychosis in Parkinsons
Older age
Longer duration of illness
Dementia
Severity of illness
Sleep deprivation
Use of dopamine agonists
Polypharmacy
Criteria for diagnosis of LBD
If both motor sx and cognitive sx develop within 12 months
Criteria for diagnosis of Parkinsons dementia
If parkinsonian sx have existed for >12 months before dementia develops
How does SPECT differentiate between Parkinsons and LBD?
LBD shows greater caudate involvement
What is similar in SPECT of both Parkinsons and LBD?
Reduced perfusion of precuneus and parietal cortex - associated with visual processing
What does DAT scan detect?
Changes in dopamine transporter responsible for allowing brain cells to take up dopamine
What drug is licensed for treatment of Parkinsons Dementia?
Rivastigmine
What disorders come under FTD?
Picks
Primary progressive aphasia
Semantic dementia
Corticobasal degeneration
Age of onset of FTD
40-75
FTD accounts for how many cases of presenile dementia?
20%
Which chromosome is linked to FTD?
17
Early clinical features of FTD?
Personality
Behaviour
Which personality sx are seen in early FTD?
Disinhibition
Social misconduct
Lack of insight