Related Experiment Video
Updated: Jan 5, 2026
09:49
Assessing Changes in Synaptic Plasticity Using an Awake Closed-Head Injury Model of Mild Traumatic Brain Injury
Published on: January 20, 2023
3.6K
Multiple hippocampal transections: Post-operative Memory Outcomes and Seizure Control.
Nebras Warsi1, Grace M Thiong'o2, Jeff Zuccato1
1Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada.
Epilepsy & Behavior : E&B
|October 27, 2019
Summary
Multiple hippocampal transection (MHT) is an effective surgical option for medically-intractable temporal lobe epilepsy, preserving verbal memory in most patients. Further research is needed to compare MHT with standard temporal lobectomy for optimal patient outcomes.
Area of Science:
- Neurosurgery
- Epilepsy Surgery
- Cognitive Neuroscience
Background:
- Medically-intractable temporal lobe epilepsy often requires surgical intervention.
- Standard temporal lobectomy with amygdalohippocampectomy carries risks of postoperative language and memory decline.
- Multiple hippocampal transection (MHT) has emerged as a technique to potentially mitigate these cognitive risks.
Purpose of the Study:
- To systematically review the literature on the efficacy of MHT in preserving verbal memory.
- To evaluate seizure outcomes associated with MHT.
- To identify factors influencing verbal memory preservation after MHT.
Main Methods:
- Systematic review adhering to PRISMA guidelines.
- Inclusion of studies reporting Engel seizure outcomes and verbal memory measures.
- Data extraction on pre- and postoperative verbal memory, seizure control, and demographics.
- Random effects and meta-regression models for data analysis.
Main Results:
- Eleven studies involving 114 patients were analyzed.
- Engel class I seizure outcome ranged from 64.7% to 94.7%, achieved by 84 patients.
- 86.8% of patients with complete data demonstrated preserved verbal memory post-MHT.
- Higher preoperative verbal memory scores were significantly associated with better postoperative memory preservation (p=0.003).
Conclusions:
- MHT is an evolving surgical technique showing promise for preserving verbal memory in epilepsy patients with good baseline function.
- While seizure outcomes with MHT appear reasonable, direct comparisons with temporal lobectomy require more extensive evidence.
- Further research is warranted to establish MHT's role relative to established surgical procedures.
