Summary: Geriatric Psychiatry

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  • 1 Neurocognitive Disorder/Dementia

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  • Non Modifiable Risk factor of Dementia


    • Advancing Age: The risk for any type of dementia increases significantly for those aged 65 years and older.
    • Gender: Females have a higher risk of developing dementia, particularly Alzheimer’s Disease.
    • Genetics: Dementia is caused by a combination of genetic and environmental factors
  • Modifiable Risk factor of Dementia

    • Cardiovascular Disease: Conditions that affect heart and blood vessel health, such as hypertension, diabetes mellitus, high serum cholesterol, and obesity.
    • Psychiatric Illness: Depression is identified as a major risk factor.
    • Lifestyle Factors: Habits that increase risk include smoking, alcohol consumption, and physical inactivity. A lack of social engagement is also a contributing factor.
    • Other Health Factors:
      • Hearing impairment.
      • Traumatic brain injury.
      • Low levels of early-life education.
    • Environmental Factors: General environmental conditions also play a role in dementia risk.
  • 1.1 Alzheimer's Dementia

  • Cardinal signs of Alzheimer's Dementia

    Progressively worsening memory loss (especially for recent events), impaired reasoning, and difficulty performing everyday tasks.
  • Pathophysiology of Alzheimer's Disease

    Buildup of amyloid and tau proteins
  • Progression of Alzheimer's Dementia

    Chronic and gradual decline
  • Imaging in Alzheimer's Dementia

    Hippocampal atrophy
    Posterior gradient atrophy - posterior (parietal) worse than anterior (frontal)
  • Treatment of Alzheimer's Dementia

    Cholinesterase inhibitor
    Memantine (BPSD)
    Aducanumab (treat underlying cause)
  • 1.2 Vascular Dementia

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  • Cardinal sign of Vascular Dementia

    Impaired judgment, confusion, and difficulty following instructions or organizing tasks. Symptoms may appear suddenly after a stroke.
  • Aetiology of Vascular Dementia

    Acquired – vascular events, chr ischemia
  • Progression of Vascular Dementia


    - Step-wise: recurrent strokes
    - Chronic progressive: chronic small vessel ischemia
    - Mixture of above
    Can be static if no stroke recurrence
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