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Executive dysfunction is the primary cognitive impairment in progressive supranuclear palsy
Adam Gerstenecker1, Benjamin Mast, Kevin Duff
1Department of Psychological and Brain Sciences, University of Louisville, Louisville, KY 40292 USA.
Summary
Cognitive difficulties, particularly executive dysfunction, are common in progressive supranuclear palsy (PSP). Many PSP patients, even without dementia, show significant neurocognitive impairment.
Area of Science:
- Neurology
- Neuropsychology
Background:
- Cognitive impairment is increasingly recognized in progressive supranuclear palsy (PSP).
- Previous understanding may have underestimated the prevalence and severity of cognitive deficits in PSP patients not clinically diagnosed with dementia.
Purpose of the Study:
- To investigate the prevalence and nature of neurocognitive performance in a large cohort of progressive supranuclear palsy (PSP) patients.
- To identify specific cognitive domains most affected in PSP.
Main Methods:
- Neuropsychological assessment of 200 patients diagnosed with PSP across multiple clinical sites.
- Utilized a range of standard neuropsychological tests to evaluate cognitive functions.
Main Results:
- Executive dysfunction was the primary cognitive deficit, with 74% impaired on the Frontal Assessment Battery and 55% on the Dementia Rating Scale's Initiation/Perseveration subscale.
- Milder impairments were observed in memory, constructional abilities, and naming functions.
- Significant cognitive impairment was found in a majority of PSP patients, including those not meeting criteria for clinical dementia.
Conclusions:
- Cognitive difficulties, especially executive dysfunction, are a highly prevalent feature of progressive supranuclear palsy (PSP).
- These findings highlight the need for comprehensive neuropsychological evaluation in all PSP patients.
- Results have significant clinical implications for managing and supporting individuals with PSP.
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