Sleep and Rehearsal-Driven Memory in Epilepsy

Not yet recruiting

• Conditions: Epilepsy; Memory Consolidation

• Registration Number: NCT06967935
• Lead Sponsor: Hospices Civils de Lyon

Brief Summary

Memory consolidation transforms unstable memory traces into lasting representations, a process enhanced by both sleep and rehearsal during learning. Rehearsal is thought to accelerate consolidation by inducing memory reactivations that resemble those occurring during sleep. However, the respective mechanisms of sleep- and rehearsal-induced consolidation-and their potential interactions-remain poorly understood, especially in patients with temporal lobe epilepsy, where rehearsal might help compensate for memory deficits linked to hippocampal dysfunction, and where sleep may exacerbate epileptic activity. The CORESOM-EPI study aims to compare the effects of rehearsal and sleep on memory consolidation in patients undergoing video-EEG monitoring. Participants will learn "object-place" associations under two conditions (single versus repeated encoding), with memory tested immediately and again after a 12-hour delay. This delay will either include a full day awake or a night of sleep, allowing direct comparison of sleep- and rehearsal-related consolidation effects. Each participant will perform the task twice, with "wake" and "sleep" condition, in a balanced order. As a preliminary phase of the CRIMES study (ANR-DFG 2024), CORESOM-EPI will help assess how sleep and rehearsal influence memory consolidation in epilepsy. It will also serve to adapt the behavioral task for clinical use, paving the way for a future intracranial EEG investigations that will explore the neural networks involved and their modulation by epileptic activity.

Detailed Description

Not available

Study Timeline

• Status Verified: 2025-05
• Study Start: 2025-05
• Study First Submitted: 2025-05-05
• Study First Submitted QC: 2025-05-05
• Last Update Submitted: 2025-05-05
• Study First Posted: 2025-05-13
• Last Update Posted: 2025-05-13
• Primary Completion: 2026-05
• Study Completion: 2026-05

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• Patient with epilepsy (any type of epilepsy)
• Hospitalized for video-EEG recording lasting at least 4 days
• Aged 18-65 years

Exclusion Criteria

• Major cognitive impairment other than memory deficit
• Refusal to participate
• Pregnant women, women in labor or nursing mothers
• Persons deprived of their liberty by judicial or administrative decision
• Persons under psychiatric care
• Persons admitted to a health or social institution for purposes other than research
• Adults under legal protection (guardianship, curatorship)

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Change in the percentage of object categories recalled (vs. not recalled) between immediate (30 min after learning) and delayed (12h after learning) recall for rehearsed versus non-rehearsed items.	Day 2 + 48 hours	The impact of rehearsal on object category recognition in an object-place learning paradigm is assessed.; For the primary outcome, data from the 2 conditions ("wake" and "sleep" during the 12h period between immediate and delayed recall) will be pooled. Each participant will take part in the wake and sleep condition over 4 days (2 conditions separated by at least 24h), in a balanced order between participants.

Trial Locations

Locations (1)

Service de neurologie fonctionnelle et d'épileptologie, Hôpital neurologique Pierre Wertheimer; 🇫🇷 Bron, France