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Related Concept Videos

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.

Language and Cognition

Language and Cognition

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.

Higher Mental Functions of the Brain: Language

Higher Mental Functions of the Brain: Language

Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...

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Related Experiment Video

Updated: May 29, 2026

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

Published on: February 19, 2018

Association between language and spatial laterality and cognitive ability: an fMRI study.

Joanne L Powell¹, Graham J Kemp, Marta García-Finaña

¹Magnetic Resonance and Image Analysis Research Centre (MARIARC), University of Liverpool, UK. joanne.powell@liverpool.ac.uk

|September 6, 2011

Summary

This summary is machine-generated.

Left-handers and individuals with rightward language dominance exhibit lower working memory. Dissociating language and spatial processing between brain hemispheres enhances verbal and perceptual skills, supporting the hemispheric crowding hypothesis.

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Area of Science:

Neuroscience
Cognitive Psychology
Psycholinguistics

Background:

Handedness and brain lateralization influence cognitive functions.
Understanding the interplay between language, spatial processing, and cognitive abilities is crucial.

Purpose of the Study:

To investigate the relationship between language laterality, spatial laterality, and cognitive abilities (working memory, verbal comprehension, perceptual organization).
To explore how the interaction between these lateralities affects cognitive performance in right-handers and left-handers.

Main Methods:

Functional magnetic resonance imaging (fMRI) was used to assess brain lateralization in 42 right-handers and 40 left-handers.
Cognitive abilities were measured using the Wechsler Adult Intelligence Scale (version III).

Main Results:

Left-handers demonstrated lower working memory scores compared to right-handers.
Increased rightward language laterality correlated with decreased working memory performance.
Dissociating language and spatial processing across hemispheres significantly improved verbal comprehension and perceptual organization.
Conversely, associating both processes within the same hemisphere led to decreased performance.

Conclusions:

The findings support the 'hemispheric crowding' hypothesis, suggesting enhanced cognitive ability when language and spatial processing are lateralized to different hemispheres.
The left inferior frontal gyrus may play a role in subvocal rehearsal impacting working memory.
Brain lateralization patterns significantly interact with cognitive task performance.