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38 Cards in this Set
- Front
- Back
Pathology of Frontal temporal degneration
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1) neuronal loss, gliosis, and sometinmes spongiosis and psick bodies
2) absense of neurofibrillary tangles and amyloid plaques seen in AD |
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3 subtypes of Frontal temporal degneration
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1) frontotemporal dementia (symetric or assymetrci frontal lobe or anterior lobe degeneration)
2) sematic dementia (left temporal degeneration) 3) progressive nonaffluent aphasia (left inferior frontal degeneration) |
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Progressive non-affluent aphasia
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marked dysfunction in expressive language (aggramatism, anomia)
tests: -Low word generation FAS -poor repetition -poor comprehension of grammatical structures (word sequencing) -variable decline in word retieval (Boston Naming) |
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Semantic Dementia
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loss in accumulated information stores (vocab., object identity, surface dyslexia)
Tests: Poor word retrieval (bostom naming) lower fund of knowledge (IN) reduced word knowledge (VC) poor catergory fluency (Catergory naming) Relatively preserved recent memory as compared to remote memory |
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Dementia of frontal type
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decline in personlaity and behavior
Tests: Executive functioning disturbances |
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Constructional ability
AD vs. left and right FTLD |
AD<L and R FTD
contructional ability (Rey-Osterrieth copy, Berry) |
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Left FTLD<AD
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-word-retrieval (Boston Naming Test)
-Verbal semantic memory (IN, VC, catergory generation) -verbal executive ability (FAS) |
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Right FTLD<AD
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more perseverative behavior
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AD and FTLD did not differ in
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memory perfomrance (verbal or visual)
IQ subtest other than VC and IN |
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Neuropsychology characteristics of Alzheihmers
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1) Prominent declines in memory (verbal and nonverbal)
2) At least mild declines in: ----Language (word-retrieval, word generation) ----Visual Perceptual-spatial Skills ----Executive/Problem-solving Skills ---Mental Speed 3) Overall intelligence (PIQ<VIQ) 4) Intact basic attention, remote memory, vocabulary range, motor dexterity |
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Dysfunction in Temporal lobes
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Verbal and nonverbal memory, word-retrieval
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Parietal lobes
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Visual perceptual/spatial skills
IQ Math |
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Frontal lobes
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Executive Tasks
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MRI
scans found.... |
Hippocampal atrophy
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SPECT/PET
found... |
Primary
Bitemporal- Biparietal hypoperfusion |
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AD fibers
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neurofibrilly tangles
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Best measures for initial diagnosis of AD
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Learning and recall scores (Logical Memory, RAVLT) because they decline precipitously at onset of disease)
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Best measures of staging disease
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Word-retrieval (Boston Naming Test), word generation (FAS), visual spatial skills (Block Design, Rey Figure), and recognition memory (because they decline gradually from onset to middle stages of the illness)
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Cognitive differences between young and old AD patients
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--After correction for age, very old AD patients (>80) outperformed “young” AD patients (<70) on tests of executive functions, visuospatial skills, and delayed memory
---Very old AD patients do not show the focal, disproportionate losses in memory and executive function seen in younger AD patients |
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Transitional state between AD and age-related cognitive changes
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1) Show more extensive memory loss than normal aging, but do not meet criteria for dementia
1) Progresses to AD at rate of 10% to 15% per year (as compared to 1% to 2% of normal controls) 2) Up to 80% meet criteria for AD within 6 years |
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Frontal variant subgroup of AD
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Display frontal dysfunction in addition to posterior disturbance
----Memory, language, and visual-spatial skills comparable to AD ----More executive deficits, neuropsychiatric symptoms, impairment of daily living, and caregiver distress than AD |
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Vascular Dementia
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---Multiple infarcts in cerebral gray matter (cortical vascular dementia), and/or
---Lesions in subcortical white matter (subcortical vascular dementia or subcortical ischemic vascular dementia) |
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Cognitive findings in AD versus Vascular Dementia
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1) Both exhibit generalized cognitive dysfunction involving multiple cognitive domains:
a) Semantic memory/naming, psychomotor speed, memory, executive function, visuospatial ability, and language 2) Despite the differences in brain pathology, many studies have failed to detect differences in cognition between the two groups a) However, in some studies memory loss is more prominent in AD, while frontal and subcortical dysfunction is the most characteristic aspect of vascular dementia leading to worse executive function |
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volume of subcoritcal intensities related to
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decline in attention
processing speed executive skills |
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whole brain atrophy
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language
memory visual perceptual skills |
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Frontal variant subgroup of AD
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Display frontal dysfunction in addition to posterior disturbance
----Memory, language, and visual-spatial skills comparable to AD ----More executive deficits, neuropsychiatric symptoms, impairment of daily living, and caregiver distress than AD |
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Vascular Dementia
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---Multiple infarcts in cerebral gray matter (cortical vascular dementia), and/or
---Lesions in subcortical white matter (subcortical vascular dementia or subcortical ischemic vascular dementia) |
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Cognitive findings in AD versus Vascular Dementia
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1) Both exhibit generalized cognitive dysfunction involving multiple cognitive domains:
a) Semantic memory/naming, psychomotor speed, memory, executive function, visuospatial ability, and language 2) Despite the differences in brain pathology, many studies have failed to detect differences in cognition between the two groups a) However, in some studies memory loss is more prominent in AD, while frontal and subcortical dysfunction is the most characteristic aspect of vascular dementia leading to worse executive function |
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volume of subcoritcal intensities related to
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decline in attention
processing speed executive skills |
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whole brain atrophy
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language
memory visual perceptual skills |
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2 mechanism for cognitive loss in VD
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specific lesions in subcortical pathways
tissue loss accompany brain atrophy due ot inafarction or cerebro vascular disease |
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SPECT depression showed
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decreased frontal and right hemisphere
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Depression =
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decline in nonverbal skills (PIC/nonverbal memory)
severity of depression=decline in mental speed/executive |
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State versus trait depressive pattern
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trait (right hemishpehere) :
-- does not vary with severity --present before onset of sx --remains after treatment --permance suggest structural brain abnormalites State: -- varies with symptom severity --improve with treatment --non permant alterations |
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Right versuis left
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Right: neural substrate for emotion
LEft: control of emotional expression |
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2 condition necessary for depression
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1) abnormal structural of right hemishphere
2) interuption of the regulatory control of affect by the abterior subcortical dominant hemiphere |
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after left hemishpere injury depression
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disrupts inhibtion of preexisting cereberal abnormality
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cognition in depressive subtypes
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vegtative symptoms = cognitive abnotmalities
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