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Related Concept Videos

Lateralization01:28

Lateralization

624
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.
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Cerebral Hemispheres01:05

Cerebral Hemispheres

898
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: Oct 9, 2025

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Developmental changes in neural lateralization for visual-spatial function: Evidence from a line-bisection task.

Katrina Ferrara1,2, Anna Seydell-Greenwald1, Catherine E Chambers1

  • 1Center for Brain Plasticity and Recovery, Georgetown University, Washington, District of Columbia, USA.

Developmental Science
|December 16, 2021
PubMed
Summary
This summary is machine-generated.

The developing brain initially processes spatial tasks bilaterally, similar to language development. By age 10, this spatial processing becomes right-hemisphere specialized, mirroring language lateralization trends.

Keywords:
brain lateralizationchild developmentfMRIlandmark taskline bisection taskparietal lobevisual-spatial functions

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Hemispheric specialization traditionally assigns language to the left and spatial function to the right.
  • Evidence primarily comes from adult studies and lesion patients, leaving developmental origins unclear.
  • Young children show bilateral brain activation for language, shifting to left-lateralization by late childhood.

Purpose of the Study:

  • To investigate the developmental trajectory of brain lateralization for a spatial task.
  • To determine if spatial processing follows a similar developmental path as language, moving from bilateral to lateralized activation.
  • To examine functional magnetic resonance imaging (fMRI) activation in children aged 5-11 during a line bisection task.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants (ages 5-11) performed a line bisection task (judging the longer end of a bisected line).
  • Activation patterns were analyzed to compare young children with older children and adult data.

Main Results:

  • Young children (5-11 years) exhibited bilateral activation for the spatial task.
  • Activation was observed in right-hemisphere areas typical for adults and homotopic left-hemisphere regions.
  • By age 10, activation became significantly right-lateralized, mirroring language development patterns.

Conclusions:

  • Spatial processing, like language, develops from bilateral representation to unilateral specialization.
  • This suggests a common developmental principle for brain lateralization across different cognitive functions.
  • Understanding these developmental trajectories is key to comprehending the mechanisms and reasons behind brain lateralization.