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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.

Cerebral Hemispheres

Cerebral Hemispheres

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...

Lobes of the Cerebrum

Lobes of the Cerebrum

The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.

Functional Brain Systems: Limbic System

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...

Cerebrum: Anatomical Overview II

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...

Cerebrum: Anatomical Overview I

Cerebrum: Anatomical Overview I

The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...

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Related Experiment Video

Updated: May 8, 2026

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice

Published on: July 31, 2019

Two distinct forms of functional lateralization in the human brain.

Stephen J Gotts¹, Hang Joon Jo, Gregory L Wallace

¹Section on Cognitive Neuropsychology, Laboratory of Brain and Cognition, and Scientific and Statistical Computing Core, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA.

Proceedings of the National Academy of Sciences of the United States of America

|August 21, 2013

Summary

The human brain

Keywords:

asymmetry circuit intelligence segregation specialization

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Last Updated: May 8, 2026

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice

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Published on: July 31, 2019

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

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

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

Published on: September 27, 2010

Area of Science:

Neuroscience
Cognitive Psychology
Brain Imaging

Background:

Hemispheric lateralization is theorized to enhance cognitive function.
Quantitative links between brain lateralization and cognitive performance remain unclear.

Purpose of the Study:

To investigate the relationship between distinct patterns of functional brain lateralization and cognitive abilities.
To determine if the degree of lateralization in specific brain regions predicts performance in verbal and visuospatial tasks.

Main Methods:

Analysis of functional brain lateralization patterns in the left and right cerebral hemispheres.
Correlation of lateralization metrics with behavioral assessments of verbal and visuospatial skills.

Main Results:

The left hemisphere exhibits more exclusive intra-hemispheric interactions for language and motor regions.
The right hemisphere shows more integrative inter-hemispheric interactions for visuospatial and attentional processing.
The degree of lateralization in these systems selectively predicted verbal and visuospatial abilities.

Conclusions:

Distinct lateralization patterns exist in the left and right hemispheres, associated with different cognitive functions.
Brain lateralization is directly linked to enhanced cognitive abilities, supporting its functional significance.