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Related Concept Videos

Lateralization01:28

Lateralization

481
Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
481
Cerebral Hemispheres01:05

Cerebral Hemispheres

524
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...
524
Language and Cognition01:27

Language and Cognition

441
Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
441

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Related Experiment Video

Updated: Sep 11, 2025

Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization
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Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization

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Factors associated with lateralized cognitive dysfunction using the Cognitive Lateralization Rating Index in

Sydney E Park1, Hope M Reecher1, Heather Hennrick2

  • 1Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA.

Journal of Clinical and Experimental Neuropsychology
|August 12, 2025
PubMed
Summary

The Cognitive Lateralization Rating Index (CLRI) can assess cognitive dysfunction in pediatric epilepsy surgery candidates. Left hemisphere seizures were linked to dominant hemisphere dysfunction, aiding surgical planning.

Keywords:
Pediatric neuropsychologycognitive dysfunctionepilepsy surgery candidacylanguage lateralizationlateralization index

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Area of Science:

  • Neuroscience
  • Pediatric Neurology
  • Cognitive Psychology

Background:

  • Optimizing cognitive outcomes after pediatric epilepsy surgery necessitates understanding functional changes, often linked to hemispheric language lateralization.
  • Assessing cognitive lateralization in children is challenging due to ongoing brain development and the impact of epilepsy.
  • The Cognitive Lateralization Rating Index (CLRI) offers a quantitative method to systematically evaluate lateralized cognitive dysfunction.

Purpose of the Study:

  • To examine demographic and clinical variables in relation to the CLRI in pediatric epilepsy surgery candidates.
  • To determine the utility of the CLRI in characterizing lateralized cognitive dysfunction and atypical functional organization.
  • To assess the CLRI's potential as a tool for stratifying cognitive risk in pre-surgical evaluations.

Main Methods:

  • A national multi-site cohort of 179 pediatric epilepsy surgery candidates was analyzed.
  • Demographic data, clinical variables (seizure type, hemisphere of onset), and CLRI scores were collected.
  • Statistical analyses were performed to identify associations between variables and cognitive lateralization.

Main Results:

  • The CLRI successfully demonstrated lateralization of cognitive dysfunction and identified atypical functional organization in the pediatric sample.
  • No significant associations were found between demographic variables or age of seizure onset and cognitive lateralization.
  • Children with focal epilepsy showed a trend towards lateralized cognitive profiles, though not statistically significant.
  • Patients with left hemisphere seizures were significantly more likely to exhibit dominant hemisphere dysfunction or atypical organization on the CLRI.

Conclusions:

  • The CLRI is a potentially valuable tool for quantitatively assessing cognitive risk profiles in pediatric epilepsy surgery evaluations.
  • This quantitative approach can aid both research and clinical decision-making for optimizing surgical outcomes.
  • The findings highlight the CLRI's utility in understanding cognitive lateralization in pediatric epilepsy.