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36 Cards in this Set
- Front
- Back
Cognitive Disorders
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A group of disorders of memory, orientation, level of consciousness, or executive functioning
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Dementia
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Gradual loss of intellectual ability without impairment of consciousness
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Alzheimer's Disease
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A dementia characterized by prominent memory loss and word-finding difficulty w/o motor impairment. Late behavioral changes.
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Pathological bases for AD
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Cortical atrophy (esp parahippocampal) w/ hydrocephalus ex vacuo. EC beta-amyloid plaques and cytoplasmic neurofibrillary tangles of tau protein. **tau distribution correlates w/ dz severity.
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Apolipoprotein E (apo E)
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Protein involved in cholesterol metabolism whose allele (E4) is associated with increased risk of AD.
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Amyloid Precursor Protein (APP)
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Large protein from which B-amyloid is derived- mutation associated with early-onset AD. Found on Chrom 21.
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Presenilin
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Gene associated with early onset AD; found on Chrom 14
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Making the dx: AD
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Clinical dx. Brain Imaging, Test to r/o B12, folate, TSH, urine drug screen
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Vascular Dementia
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Dementia caused by many small brain infarctions. Stepwise pattern of decline, with sudden onset or increases in symptoms. Focal neurologic signs common
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Lewy Body Dementia
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Dementia characterized by fluctuating cognition, hallucinations and Parkinsonian movement disorders.
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Lew Body path
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Intracytoplasmic alpha-synuclein inclusions in a small # of neurons, mainly in the cingulate cortex.
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Pick Disease
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Type of frontemporal lobar degeneration characterized by loss of frontal executive function and early disruptive and inappropriate behavior
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Pick Disease path
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Frontotemporal atrophy. Pick Bodies seen in remaining neurons -- cytoplasmic inclusions made up of tau proteins.
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HIV Dementia
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Dementia caused by direct brain infection by the virus and resulting atrophy and demyelination. An ominous prognostic sign.
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Amnestic Disorder
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Memory loss without other cognitive impairments
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Pseudodementia
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Dementia-like manifestation of depression in the elderly. Treatable.
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Classes of drugs used for dementia
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Cholinesterase Inhibitors, Glutamatergic Antagonists
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Cholinesterase Inhibitors
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Block breakdown of CNS synaptic Ach, prolonging its effects. Donepezil, Rivastigmine, Galantamine
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Donepezil
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Centrally acting cholinesterase-inhibitor used for all stages of dementia
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Rivastigmine
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Centrally acting cholinesterase-inhibitor used for mild/moderate AD, Parkinson's dz dementia
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Galantamine
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Centrally acting cholinesterase-inhibitor used to treat mild/moderate dementia
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Primary side effects of central cholinesterase inhibitors
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NVD, anorexia
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secondary side effects of central cholinesterase inhibitors
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insomnia, vivid dreams, bradycardia, syncope
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Glutamatergic Antagonists
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antagonize NMDA receptor, relieving excitotoxicity. Memantine
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Memantine
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Glutamatergic Antagonist used to treat moderate/severe AD
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Memantine side effects
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headache, constipation, agitation
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Memantine drug interactions
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decreases metabolism of buproprion, trihexyphenidyl.
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Delirium
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A syndrome of waxing and waning impairment of consciousness. Often oriented to person, inattentive. Can progress to dementia/death.
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What can cause delirium
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Acute illness, substance abuse/withdrawal, fever, post-op, anticholinergic meds, pain, dehydration, polypharmacy
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Delirium Tremens
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Alcohol withdrawal delirium, usually on 3rd day of withdrawal in pts who drank heavily 5+ years. 20% mortality.
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Prevention strategies
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Keep pt oriented, cognitively stimulated, nonpharmacologic sleep aids for pts w/ insomnia,
keep pt mobile, don't use restraints, visual/hearing aids, avoid dehydration. |
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Treating delirium
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treat underlying cause, orient pt, neuroleptic meds like haloperidol, or a benzo
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Neurodegenerative Disease
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Disorder involving death of functionally related neurons
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alpha synuclein
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the abnormal protein seen in Lewy Bodies
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beta amyloid
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the abnormal protein in senile plaques
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Lewy Bodies
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abnormal cellular inclusions made up of alpha synuclein and associated with Parkinson's Disease and Lewy Body Dementia. **halo
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