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A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
Published on: January 11, 2020
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Mental time travel in mild cognitive impairment
Sara Coelho1, Manuela Guerreiro1, Catarina Chester1
1a Faculty of Medicine, University of Lisbon , Lisbon , Portugal.
Journal of Clinical and Experimental Neuropsychology
|July 2, 2019
Summary
Patients with mild cognitive impairment (MCI) exhibit significant deficits in mental time travel (MTT), struggling to recall past and imagine future events. These impairments highlight broader cognitive challenges in MCI beyond memory loss.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Mental Time Travel (MTT) involves recalling past and imagining future events, crucial for decision-making and planning.
- Patients with amnestic mild cognitive impairment (aMCI) often show memory deficits, but their MTT abilities, particularly concerning internal versus external details, remain debated.
- Understanding MTT in aMCI is vital for characterizing cognitive impairments and potential interventions.
Purpose of the Study:
- To investigate whether aMCI affects the generation of internal and external details in MTT for past and future events.
- To analyze specific detail categories within internal (event, thought/emotion, place, time, perceptual) and external (extraneous, semantic, other, repetitions) information.
- To compare MTT performance in aMCI patients with healthy controls.
Main Methods:
- A cohort of 29 aMCI patients and 29 healthy controls completed an MTT task using an Autobiographical Interview.
- Participants generated past and future events in response to cue words.
- Event transcriptions were segmented and classified into internal and external detail categories to derive composite scores.
Main Results:
- aMCI patients produced significantly fewer global details compared to controls.
- Both groups produced more internal than external details.
- aMCI patients, like controls, found future event generation more challenging than past event generation.
- Specific internal detail categories like 'event details' and 'thought/emotion' were prominent in both groups.
Conclusions:
- aMCI is associated with widespread deficits in Mental Time Travel.
- These MTT impairments likely stem from broader deficiencies in the complex cognitive functions underpinning MTT.
- The findings suggest MTT tasks can reveal multifaceted cognitive challenges in aMCI.
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