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Related Concept Videos

Role of Hippocampus in Memory01:19

Role of Hippocampus in Memory

658
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
658

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Related Experiment Video

Updated: Oct 20, 2025

Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study
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Multiple hippocampal transections for mesial temporal lobe epilepsy.

David Pitskhelauri1, Elina Kudieva1, Maria Kamenetskaya2

  • 1Department of Neurosurgery, Burdenko National Medical Research Center of Neurosurgery, Moscow, Russia.

Surgical Neurology International
|September 13, 2021
PubMed
Summary

Multiple hippocampal transections (MHT) effectively treat drug-resistant mesial temporal lobe epilepsy, with 83.3% achieving seizure freedom. While MHT can preserve memory, it does not guarantee it and may cause side effects like visual field loss.

Keywords:
Epilepsy surgeryHippocampal transectionsMemoryMultiple hippocampal transectionNeuronalglial tumor

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Area of Science:

  • Neurosurgery
  • Epileptology
  • Neurology

Background:

  • Drug-resistant mesial temporal lobe epilepsy (MTLE) poses significant treatment challenges.
  • Surgical interventions are explored for refractory MTLE cases.
  • Understanding the efficacy of specific surgical techniques is crucial.

Purpose of the Study:

  • To evaluate the effectiveness of multiple hippocampal transections (MHT) for drug-resistant MTLE.
  • To assess seizure control and neurological outcomes post-MHT.
  • To investigate the impact of MHT on memory functions.

Main Methods:

  • Six patients with refractory MTLE underwent MHT.
  • Patient ages ranged from 18 to 43 years.
  • Etiologies included tumors, focal cortical dysplasia (FCD), cavernous angioma, and encephalocele.

Main Results:

  • Five out of six patients (83.3%) achieved Engel Class I outcome (seizure freedom).
  • Four patients experienced homonymous superior quadrantanopia; three developed nominative aphasia.
  • Memory outcomes varied: two improved, two declined in delayed verbal memory; visual memory was impaired in two cases.

Conclusions:

  • MHT is an effective treatment for drug-resistant MTLE, particularly when caused by medial temporal complex tumors.
  • MHT may preserve memory in patients with structurally intact hippocampi.
  • MHT does not guarantee memory preservation and carries risks of neurological deficits.