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Published on: September 20, 2018
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Clinical Manifestations
1UCSF, san francisco, CA, USA.
Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 24, 2025
Summary
Individuals with frontotemporal dementia (FTD) genetic mutations do not show altered inequity aversion before symptom onset. This suggests behavioral markers for early FTD detection are challenging to identify in asymptomatic carriers.
Area of Science:
- Neuroscience
- Behavioral Economics
- Genetics
Background:
- Frontotemporal dementia (FTD) is a neurodegenerative disorder causing cognitive and behavioral impairments.
- Early detection of FTD is crucial for potential interventions.
- This study investigated if genetic mutations linked to FTD affect inequity aversion before clinical symptoms appear.
Purpose of the Study:
- To determine if carriers of FTD-linked genetic mutations exhibit altered inequity aversion compared to non-carriers.
- To explore potential pre-symptomatic behavioral markers for FTD.
Main Methods:
- 102 participants completed a modified Dictator Game to assess inequity aversion.
- Behavioral models analyzed sensitivity (parameters α and β) and consistency (GARP violations).
- Statistical comparisons used linear mixed-effects models, Kolmogorov-Smirnov tests, Wilcoxon Rank-Sum Tests, and Fisher's exact tests.
Main Results:
- No significant differences were found between genetic carriers and non-carriers in inequity aversion sensitivity (p > 0.05).
- No significant differences were observed in the consistency of inequity aversion (p > 0.05).
- Distributions of behavioral measures showed overlapping results across both groups.
Conclusions:
- This study found no significant differences in inequity aversion between FTD mutation carriers and non-carriers prior to symptom onset.
- Behavioral markers for FTD cognitive changes may only appear shortly before disease onset, complicating early detection.
- Future research should focus on alternative methods for identifying prodromal FTD biomarkers.
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