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Related Concept Videos

Cerebral Hemispheres01:05

Cerebral Hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...

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Related Experiment Video

Updated: Jun 8, 2026

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Published on: December 18, 2016

Differences in corpus callosum volume and diffusivity between temporal and frontal lobe epilepsy.

R O'Dwyer1, T Wehner, E LaPresto

  • 1Neurological Institute, Epilepsy Center, Cleveland Clinic, Cleveland, OH 44195, USA. odwyerr@ccf.org

Epilepsy & Behavior : E&B
|October 6, 2010
PubMed
Summary

Patients with temporal lobe epilepsy (TLE) and frontal lobe epilepsy (FLE) show smaller corpus callosum (CC) volumes and increased diffusivity. These brain abnormalities extend beyond the seizure origin in epilepsy patients.

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Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
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Area of Science:

  • Neuroscience
  • Neurology
  • Radiology

Background:

  • Epilepsy is a neurological disorder characterized by recurrent seizures.
  • The corpus callosum (CC) is the largest white matter structure in the brain, connecting the two cerebral hemispheres.
  • Previous studies suggest white matter abnormalities in epilepsy, but specific CC involvement requires further investigation.

Purpose of the Study:

  • To investigate corpus callosum (CC) volume and diffusion characteristics in patients with temporal lobe epilepsy (TLE) and frontal lobe epilepsy (FLE).
  • To compare CC measures between epilepsy patients and healthy controls.
  • To determine if observed CC abnormalities are localized to the epileptogenic zone or more widespread.

Main Methods:

  • High-resolution T1-weighted MRI scans were used to measure CC volumes in 18 controls and 44 epilepsy patients.
  • Apparent diffusion coefficients (ADCs) of the CC were measured using co-registered ADC maps.
  • CC volumes were corrected for total brain volume.

Main Results:

  • Epilepsy patients (TLE and FLE) exhibited smaller CC volumes compared to controls, even after brain volume correction.
  • Patients showed higher ADC values in the CC, indicating increased diffusivity.
  • Significant findings were observed in CC regions (WR1, WR2, WR6) connecting frontal and temporal lobes.
  • Frontal lobe epilepsy patients had smaller WR1 and higher ADC values; temporal lobe epilepsy patients showed similar findings for WR6.

Conclusions:

  • Atrophy and increased diffusivity in specific CC subregions suggest anatomical abnormalities in TLE and FLE.
  • These CC abnormalities extend beyond the primary epileptogenic zone.
  • Findings highlight the widespread impact of epilepsy on brain structure and connectivity.