Autobiographical Memory, Future Thought, and Eye Movements in Huntington's Disease

Sponsor
University Hospital, Angers
Study ID
NCT07409597
Status
Not Yet Recruiting

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Conditions

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Accepted

Interventions

  • neuropsychological tests — OTHER
    different neuropsycholocical tests
  • Eye tracker use — OTHER
    Eye movement assessment/recording is performed under two conditions: a "control" condition and an "autobiographical recall" condition.

Study Details

Huntington's disease (HD) is a hereditary neurodegenerative disorder characterized by progressively worsening motor, cognitive, psychiatric, and behavioral deficits. Cognitive deficits occur early on, affecting in particular executive functions (inhibition, flexibility), decision-making, memory, attention (selective, sustained), perceptual and visuospatial skills, and information processing speed. More specifically, memory deficits quickly affect different memory systems (short-term memory, long-term memory, etc.), including autobiographical memory. Autobiographical memory is usually defined as a system that stores all the information (semantic component) and specific memories (episodic component) specific to an individual, accumulated from an early age. Autobiographical memory is now considered essential to the construction of a sense of identity and continuity. It is also considered indispensable for projecting into the future, otherwise known as "episodic future thinking," a fundamental human capacity that is both anticipatory and adaptive. Autobiographical memory deficits remain largely unexplored in HD, with only three studies identified in the international literature on the subject, one of which is actually based on the same neuropsychological data as another, adding a neuroanatomical analysis focused on autobiographical memory. These studies show that the autobiographical recollections of patients with HD are mainly descriptive recollections of personal events lacking in detail, and that the abnormalities appear to be linked to the progressive degeneration of a vast cortico-subcortical brain network comprising the medial temporal cortex, the frontal cortex, and the posterior striatal and parietal regions. Deficits in episodic future thinking have never been explored in HD. A better understanding of the mechanisms underlying this type of cognitive impairment (recalling personal memories and mentally simulating future personal events) remains a major challenge today in improving the care of patients with HD. Several recent studies have shown, in different pathological contexts (Alzheimer's disease, etc.), that the parallel use of neuropsychological tests (tasks and questionnaires) and an eye-tracking system allows for a much more accurate and in-depth examination of cognitive functions (for a review, see). In addition, eye movements, such as fixations and saccades, have been associated with the retrieval of autobiographical events . These movements better reflected the person's subjective experience, particularly with regard to the visual elements of mental imagery of recovered events. This suggests that the analysis of eye behavior could enrich the assessment of autobiographical memory, beyond the data provided by traditional tests. The examination of eye movements is therefore, alongside neuropsychological testing, a promising non-invasive method for better understanding the characteristics of autobiographical memory in HD. This project therefore aims to explore the autobiographical memory of HD patients by analyzing their eye activity during tasks involving the recall of personal events using standard neuropsychological tools. By identifying oculomotor markers associated with autobiographical memory disorders, this research could: (1) provide a better understanding of the neurocognitive profile of HD, (2) pave the way for more accurate diagnostic tools, and (3) form an important basis for the development of future interventions aimed at supporting memory function in this population.

Key Dates

Start date
Apr 1, 2026
Status verified
Feb 2026
Primary completion
Apr 1, 2029
Completion
Apr 1, 2029

Study Design

Enrollment
80 participants (estimated)
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER

Arms

  • Active Comparator: healthy patients
  • Active Comparator: patients with Huntington's disease

Primary Outcome Measure

Assess the recall of personal memories and mental simulation of future personal events in patients with genetically confirmed HD, through analysis of the specificity [ Time Frame: inclusion ]

Central Contacts

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