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Related Experiment Video

Updated: May 9, 2026

Assessment of Memory Function in Pilocarpine-induced Epileptic Mice
13:34

Assessment of Memory Function in Pilocarpine-induced Epileptic Mice

Published on: June 4, 2020

Predicting post-surgical visuospatial memory performance in people with drug-resistant epilepsy.

Emma Colucci1,2, Arnaud Saj1, Simon Charbonneau3

  • 1Faculté des arts et des sciences, Département de psychologie, Université de Montréal, Montréal, Qc, Canada.

Epileptic Disorders : International Epilepsy Journal with Videotape
|May 8, 2026
PubMed
Summary

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Epilepsy surgery in the dominant hemisphere impacts verbal and visuospatial memory. Preoperative memory profiles and seizure recurrence predict memory decline after temporal lobe epilepsy surgery.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurosurgery

Background:

  • Verbal memory decline is common after temporal lobe epilepsy (TLE) surgery, particularly in the dominant hemisphere targeting mesial structures.
  • The effects of TLE surgery location and hemisphere on visuospatial memory, and predictors of decline, are less understood.

Purpose of the Study:

  • To investigate the impact of TLE surgery location and laterality on visuospatial and verbal memory.
  • To identify factors predicting memory changes post-surgery.

Main Methods:

  • Retrospective analysis of 75 patients undergoing TLE surgery.
  • Utilized Brief Visuospatial Memory Test-Revised and Rey Auditory Verbal Learning Test for pre- and post-surgical assessments.

Main Results:

Keywords:
epilepsy surgeryhemispheric specializationmaterial‐specific memory impairmentmemory specialization indexmesiotemporal lobe epilepsy (mTLE)non‐verbal memory

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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

Published on: September 20, 2024

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Last Updated: May 9, 2026

Assessment of Memory Function in Pilocarpine-induced Epileptic Mice
13:34

Assessment of Memory Function in Pilocarpine-induced Epileptic Mice

Published on: June 4, 2020

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
09:57

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

Published on: September 20, 2024

  • Surgery in the dominant hemisphere for mesial TLE impaired all memory outcomes.
  • Surgery in the non-dominant hemisphere selectively affected delayed visuospatial recall.
  • Preoperative visuospatial memory (better) and verbal memory (poorer), plus post-surgical seizure recurrence, predicted visuospatial memory decline.
  • Dominant hemisphere surgery and better preoperative verbal memory predicted verbal memory decline.

Conclusions:

  • Preoperative memory profiles are crucial for predicting post-surgical visuospatial memory decline.
  • Understanding these predictors can aid in patient counseling and surgical planning.
  • Further research with larger sample sizes and standardized parameters is warranted.