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Lateralization

Lateralization

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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Related Experiment Video

Updated: Jun 23, 2026

Assessment of Cerebral Lateralization in Children using Functional Transcranial Doppler Ultrasound (fTCD)

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Published on: September 27, 2010

Different laterality patterns of the error-related negativity in corrected and uncorrected errors.

Eldad Yitzhak Hochman¹, Zohar Eviatar, Zvia Breznitz

¹University of Haifa, Israel. eldadho@umich.edu

|May 2, 2009

Summary

This study reveals how the brain processes errors, showing that the right hemisphere is key for error detection. Specific patterns of brain activity, known as the error-related negativity (ERN), differ based on the type of error made.

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Area of Science:

Neuroscience
Cognitive Psychology
Psychophysiology

Background:

The error-related negativity (ERN) is a key electrophysiological marker of error processing.
Understanding the hemispheric lateralization of ERN provides insights into brain function during error detection.

Purpose of the Study:

To investigate the laterality patterns of the ERN using a divided visual field paradigm.
To explore how different tasks and error types influence ERN lateralization in healthy adults.

Main Methods:

Event-related potentials (ERPs) were measured in healthy participants.
A divided visual field technique was employed with three tasks: bargraph judgment, lexical decision, and a flanker task.
ERN amplitude and latency were analyzed in relation to visual field presentation and error type (corrected vs. uncorrected).

Main Results:

A stronger ERN amplitude was observed for corrected errors presented to the right visual field across all tasks.
For specialized tasks, corrected errors showed shorter ERN latency on the stimulated side, while uncorrected errors showed shorter latency on the contralateral side.
In the flanker task, ERN latency for corrected errors was shorter over the right hemisphere (RH) irrespective of stimulus presentation side.

Conclusions:

The findings suggest distinct patterns of hemispheric specialization, independence, and cooperation in error detection.
The brain's response to errors is modulated by the type of error committed and the cognitive demands of the task.
The right hemisphere plays a significant role in error monitoring and detection, with lateralization effects dependent on error processing characteristics.