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Memory compromise at extended delays in people with new‐onset epilepsy
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Memory compromise at extended delays in people with new‐onset epilepsy
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Memory compromise at extended delays in people with new‐onset epilepsy
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Journal Article
Memory compromise at extended delays in people with new‐onset epilepsy
2024
Overview
Objective
Memory is one of the most sensitive markers of cognitive compromise in people with new‐onset epilepsy. Nonetheless, around half of these cases score within the normal range on standard memory testing. Here we explore whether memory retention at a 1‐week delay reveals otherwise undetected memory compromise in such individuals, and how it relates to subjective memory complaints and mood.
Methods
Using a prospective design, 38 adults with new‐onset epilepsy underwent baseline memory screening via telephone using an abbreviated Rey Auditory Verbal Learning Test (RAVLT). Psychological screening occurred via online questionnaires. One week later, without forewarning, participants completed three follow‐up memory tasks. Of particular focus, we explored longer‐term memory performances and forgetting trajectories in those individuals (n = 23) who demonstrated normal memory performances (scores >10th percentile) at baseline (30‐min delay). Outcomes were compared to 32 healthy controls, matched for age, sex, and education.
Results
As a group, people with epilepsy performed worse than controls on all memory measures, with 44 percent impaired at baseline testing. Of those unimpaired at baseline, the rate and volume of information loss over 1 week was significantly greater than for controls. Contextual memory performance at 1 week was also significantly poorer for people with epilepsy. At the individual level, the prevalence of impaired forgetting was not significantly different between patients and controls. Subjective memory complaints were not related to any objective tests but were strongly related to self‐reported mood and anxiety symptoms.
Significance
People with new‐onset epilepsy show reduced memory at short and extended intervals. For those showing normal memory at baseline, information does appear to be forgotten more quickly than in healthy controls, though the effect is not large. The findings indicate that while extended delay memory testing is not essential in all new epilepsy cases, it could provide useful information for particular individuals.
Plain Language Statement
Memory problems are common in people with epilepsy shortly after seizure onset, however, many individuals still show normal memory performances on standard neuropsychological testing. Through testing memory at an extended timepoint (1 week), our study found that on average, these individuals showed a slightly quicker rate of forgetting over a 1‐week period than people without a brain condition. Self‐reported memory complaints in people with new epilepsy were unrelated to their actual memory skills on testing at short and long timepoints but were rather linked to lower mood and quality of life.
