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  3. Developmental Changes In Neural Lateralization For Visual-spatial Function? Evidence From A Line-bisection Task.
  1. Home
  3. Developmental Changes In Neural Lateralization For Visual-spatial Function? Evidence From A Line-bisection Task.

Related Experiment Video

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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 DC, USA.

Developmental Science
|August 9, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Brain lateralization for spatial tasks like line bisection is established early in childhood. Unlike language development, spatial processing shows stable right-hemisphere dominance from age 5 to 12.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Hemispheric specialization traditionally assigns language to the left and spatial functions to the right hemisphere.
  • Evidence largely stems from adult studies and lesion patients, leaving developmental origins of lateralization less understood.
  • Language processing in young children (4-6 years) shows bilateral activation, shifting to left-hemisphere dominance later in childhood.

Purpose of the Study:

  • To investigate the developmental trajectory of lateralization for a spatial task in children.
  • To determine if spatial tasks exhibit a similar developmental shift in lateralization as observed in language.
  • To examine functional magnetic resonance imaging (fMRI) activation during a line bisection task in children aged 5-12 years.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed to measure brain activity.
  • Participants were children aged 5-12 years.
  • The task involved judging the longer end of a bisected vertical line, a spatial judgment task.

Main Results:

  • Children consistently demonstrated right-lateralized activation in parietal and posterior temporal regions.
  • These activation patterns mirrored those observed in adult studies of the line bisection task.
  • No significant age-related changes in the degree of right-lateralization were found within the 5-12 year age range.

Conclusions:

  • Spatial processing, specifically for the line bisection task, appears to be stably lateralized to the right hemisphere from early childhood.
  • This contrasts with the developing bilateral representation and subsequent left-lateralization observed for language functions.
  • Understanding developmental trajectories of lateralization is crucial for comprehending general principles of brain organization.