Related Concept Videos
01:28Lateralization
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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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01:27Language and Cognition
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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.
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01:05Cerebral Hemispheres
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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...
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01:22Lobes of the Cerebrum
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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....
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
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01:30Biological Influences on Intelligence
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Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
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01:17Cognitivism
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Cognitive psychology emerged as a significant field in the mid-20th century. It focused on understanding humans' internal mental processes. This approach emphasizes how people perceive, remember, think, and solve problems—elements critical to human cognition.
Previously dominated by behaviorism, which prioritized observable behaviors and largely ignored mental processes, psychology transformed in the 1950s. Cognitive psychologists argue that understanding how we think and process...
Previously dominated by behaviorism, which prioritized observable behaviors and largely ignored mental processes, psychology transformed in the 1950s. Cognitive psychologists argue that understanding how we think and process...
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Related Experiment Video
Updated: Sep 30, 2025
07:03
Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
Published on: July 31, 2019
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Dynamic changes in brain lateralization correlate with human cognitive performance.
Xinran Wu1, Xiangzhen Kong2, Deniz Vatansever1
1Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China.
Plos Biology
|March 17, 2022
Summary
Brain lateralization is dynamic, not fixed. Fluctuations and reversals in brain network activity relate to cognitive abilities, revealing a balance between hemispheric communication and information processing.
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Area of Science:
- Neuroscience
- Cognitive Science
- Network Science
Background:
- Hemispheric lateralization is a fundamental brain organization principle, traditionally viewed as stable.
- Emerging evidence suggests brain networks are dynamic, yet time-resolved functional lateralization remains underexplored.
Purpose of the Study:
- To map the spatiotemporal dynamics of whole-brain lateralization using resting-state fMRI.
- To investigate the relationship between lateralization dynamics and cognitive functions.
Main Methods:
- Utilized dynamic network analysis on resting-state fMRI data from the Human Connectome Project (N=991).
- Quantified lateralization dynamics using laterality fluctuations (LF) and laterality reversal (LR).
- Correlated lateralization dynamics with cognitive measures (language, cognitive flexibility) and brain network properties.
Main Results:
- Distinct laterality dynamics were observed between sensorimotor and associative networks.
- Laterality fluctuations (LF) positively correlated with language and cognitive flexibility.
- Laterality reversal (LR) negatively correlated with these cognitive abilities, suggesting a balance between segregation and integration.
Conclusions:
- Brain lateralization exhibits dynamic properties that are crucial for cognitive function.
- These dynamics reflect an adaptive balance in interhemispheric communication.
- Findings offer new perspectives on brain organization, cognition, genetics, and neurological disorders.