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Lateralization

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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 30, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Identifying Spatial Neglect in Chronic Right Hemisphere Stroke Survivors Using the RHDBank Outcomes.

Jamila Minga¹, Timothy Rich², Olga Boukrina²

¹Department of Head and Neck Surgery & Communication Sciences and Department of Neurology, Duke University, Durham, NC.

Journal of Speech, Language, and Hearing Research : JSLHR

|January 5, 2024

Summary

This summary is machine-generated.

The Apples Test effectively identified chronic spatial neglect (SN) in right hemisphere brain damage (RHD) survivors. The Cognitive Linguistic Quick Test (CLQT) also aids in detecting SN subtypes, supporting diagnostic integration for speech-language pathologists.

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Area of Science:

Neuroscience
Speech-Language Pathology

Background:

Spatial neglect (SN) chronicity and diagnostic utility are poorly understood.
Speech-language pathologists (SLPs) require effective tools for chronic SN assessment post-right hemisphere brain damage (RHD).

Purpose of the Study:

To evaluate the RHDBank test battery's effectiveness in identifying chronic SN after RHD.
To explore the utility of specific tests within the RHDBank for SN detection.

Main Methods:

Retrospective analysis of data from 29 RHD stroke survivors.
Utilized the Apples Test, Indented Paragraph Test, and Cognitive Linguistic Quick Test (CLQT) for SN assessment.
Employed laterality index scoring and hierarchical cluster analysis.

Main Results:

The Apples Test identified SN in 34% of participants.
The Indented Paragraph Test and CLQT clock drawing task had limited sensitivity for SN detection.
CLQT domain and task scores, alongside the Apples Test, effectively classified participants into SN+ and SN- groups.
SN+ participants exhibited impaired attention, executive function, and visuospatial skills.

Conclusions:

The Apples Test is valuable for differentiating chronic SN in RHD survivors.
The CLQT, particularly with multiple measures, offers a broader assessment of SN-related deficits than single tasks.
The RHDBank battery, including the CLQT and Apples Test, can detect SN subtypes in chronic RHD, aiding SLP diagnostic integration.