ArticleEpilepsia2026
Dynamic patterns of verbal memory function after an initial decline following temporal lobe resection against epilepsy: Sex-specific differences in the postoperative course.
Article in Epilepsia, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveThis study was performed to investigate the postoperative dynamics of verbal memory function after temporal lobe resection (TLR) in people with temporal lobe epilepsy (PwTLE), with a specific focus on the course following an initial verbal memory decline and the factors influencing later changes.
methodsVerbal memory performance of 169 PwTLE was retrospectively analyzed at three time points: preoperatively (T1), 6 months postoperatively (T2), and 24 months postoperatively (T3). At the group level, repeated measures analysis of variance (RM-ANOVA) was used to evaluate differences in verbal memory across time points between patients who underwent resection in the language-dominant hemisphere and language-nondominant hemisphere. At the individual level, frequencies of significant verbal memory changes between time points were calculated. Subsequently, factors influencing late changes (T2-T3) after an initial decline (T1-T2) were analyzed for the language-dominant resected group.
resultsAt the group level, RM-ANOVA revealed a significant interaction effect (p < .001) between time point and resected hemisphere, with significant declines observed in the language-dominant resected group between T1 and T2 (p < .001) and between T1 and T3 (p < .001). At the individual level, dynamic patterns of improvement, stability, and decline were observed across time points. In language-dominant resected PwTLE with an initial decline, RM-ANOVA showed a significant interaction between time point and sex (p < .001); at T3, females exhibited better recovery of verbal memory function than males (p = .04). SIGNIFICANCE: These findings underscore the importance of considering individual verbal memory trajectories following TLR, particularly after an initial decline. Notably, sex emerged as a significant factor influencing late postoperative recovery, with women showing greater verbal memory improvement than men. This suggests preliminary evidence for sex-dependent differences in cognitive recovery and highlights the need for personalized counseling in presurgical decision-making for PwTLE. PLAIN LANGUAGE SUMMARY: We investigated early and late changes in verbal memory following surgery to treat temporal lobe epilepsy. Our focus was on people who experienced an early memory decline after surgery and how their memory changed over time. We found that patients who had surgery on the language-dominant side of the brain showed significant early memory decline. However, memory changes after surgery varied greatly from person to person. Notably, women showed better late recovery in memory performance after an early decline than did men. These findings support more refined counseling and personalized care for patients before and after temporal lobe surgery.
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