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Related Concept Videos

Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

234
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
234

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Related Experiment Video

Updated: Aug 4, 2025

Author Spotlight: Studying Clinical Characters and Epilepsy Outcomes After Frontal Disconnection in Patients with MOGHE
06:04

Author Spotlight: Studying Clinical Characters and Epilepsy Outcomes After Frontal Disconnection in Patients with MOGHE

Published on: August 16, 2024

934

Structural disconnection relates to functional changes after temporal lobe epilepsy surgery.

Lucas E Sainburg1,2, Andrew P Janson2, Graham W Johnson1,2

  • 1Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37232, USA.

Brain : a Journal of Neurology
|April 5, 2023
PubMed
Summary
This summary is machine-generated.

Epilepsy surgery can cause functional brain changes in distant regions. These changes are linked to structural disconnection from the resected epileptic focus, impacting areas like the thalamus and fusiform gyrus.

Keywords:
ALFFepilepsyfMRIstructural connectivitysurgery

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Area of Science:

  • Neuroscience
  • Neurosurgery
  • Epileptology

Background:

  • Epilepsy surgery aims to resect the epileptic focus for drug-resistant focal epilepsy.
  • Focal brain lesions and resections can induce functional changes in distant brain regions.
  • The impact of structural disconnection on distant functional changes post-epilepsy surgery requires investigation.

Purpose of the Study:

  • To investigate functional brain changes distant from the resection site after temporal lobe epilepsy surgery.
  • To determine if these functional changes are related to structural disconnection from the resected epileptic focus.
  • To explore the implications for epilepsy and broader neuroscience.

Main Methods:

  • Quantified changes in resting-state functional MRI activity fluctuations pre- and post-surgery in temporal lobe epilepsy patients (n=36).
  • Utilized diffusion MRI in healthy controls (n=96) and patients to identify regions with high structural connectivity to the resected focus.
  • Estimated structural disconnection using presurgical diffusion MRI and correlated it with postsurgical functional MRI changes.

Main Results:

  • Functional MRI activity increased in the thalamus and ipsilateral fusiform gyrus post-surgery, correlating with structural connectivity to the resected focus.
  • Broader surgeries resulted in greater functional MRI changes in the thalamus compared to selective surgeries.
  • Increased structural disconnection from the resected focus predicted greater functional MRI changes in the thalamus and fusiform gyrus.

Conclusions:

  • Structural disconnection from the resected epileptic focus may drive functional changes in distant brain regions after epilepsy surgery.
  • This study establishes a link between focal structural disconnections and downstream functional effects in the brain network.
  • Findings offer insights into the neurobiological consequences of epilepsy surgery and brain network dynamics.