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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...

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.

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.

Lobes of the Cerebrum

Lobes of the Cerebrum

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Cerebrum: Anatomical Overview II

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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...

Cognitivism

Cognitivism

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.
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Related Experiment Video

Updated: May 12, 2025

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

Cognitive independence and interactions between cerebral hemispheres.

Scott L Brincat¹, Earl K Miller¹

¹The Picower Institute for Learning & Memory and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Neuropsychologia

|April 23, 2025

Summary

This summary is machine-generated.

The two cerebral hemispheres can act alone but also work together. Recent neurophysiological studies reveal how hemisphere independence and interaction influence complex behaviors.

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Last Updated: May 12, 2025

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Published on: July 31, 2019

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Area of Science:

Neuroscience
Cognitive Science
Neurophysiology

Background:

The two cerebral hemispheres can operate independently.
Interactions between hemispheres are critical for cognition.
Neuropsychiatric disorders are linked to hemisphere interactions.

Purpose of the Study:

To review recent neurophysiological evidence on hemisphere independence and interaction during complex behavior.

Main Methods:

Review of recent neurophysiological studies.
Analysis of evidence for independent and interactive hemispheric function.

Main Results:

Neurophysiological evidence supports both independent and interactive functioning of cerebral hemispheres.
Hemispheric interactions are crucial for complex cognitive tasks.

Conclusions:

Understanding hemispheric interactions is vital for comprehending cognition and neuropsychiatric disorders.