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Decision making cognition in primary progressive aphasia.

Ezequiel Gleichgerrcht¹, Teresa Torralva, María Roca

¹Institute of Cognitive Neurology (INECO), Buenos Aires, Argentina. egleich@ineco.org.ar

Behavioural Neurology

|December 31, 2011

Summary

Primary Progressive Aphasia (PPA) patients show impaired decision-making, unlike controls and behavioral variant frontotemporal dementia (bvFTD) patients. This study highlights decision-making deficits in PPA, independent of language abilities.

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Area of Science:

Neuroscience
Cognitive Psychology
Neurology

Background:

Primary Progressive Aphasia (PPA) is a neurodegenerative disease primarily affecting language functions.
Decision-making impairments are recognized in some neurodegenerative conditions, but PPA's specific profile is less understood.
Understanding cognitive deficits beyond language in PPA is crucial for comprehensive patient care.

Purpose of the Study:

To investigate the decision-making profile of patients with Primary Progressive Aphasia (PPA).
To compare PPA decision-making with behavioral variant frontotemporal dementia (bvFTD) and healthy controls.
To explore the relationship between decision-making, language function, and PPA subtypes.

Main Methods:

Utilized the Iowa Gambling Task (IGT) to assess decision-making in PPA patients (n=10), bvFTD patients (n=35), and matched controls (n=14).
Administered a comprehensive neuropsychological battery to all participants.
Analyzed IGT performance in relation to language task performance and PPA subtypes (semantic dementia, progressive nonfluent aphasia).

Main Results:

PPA patients demonstrated flat performance on the IGT, indicating an inability to adopt advantageous strategies.
Controls exhibited advantageous decision-making, while bvFTD patients displayed risk-appetitive behavior.
PPA decision-making deficits were not linked to language task performance or PPA subtypes.

Conclusions:

PPA patients exhibit a distinct decision-making deficit characterized by impaired strategy selection.
This finding differentiates PPA from bvFTD and controls, suggesting unique cognitive alterations.
Investigating decision-making in PPA offers insights into language-cognition interactions and aids in detecting clinical impairments.