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Related Concept Videos

Lateralization01:28

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 Hemispheres01:05

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...
Cerebrum: Anatomical Overview II01:11

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...
Causes of Similarity-Dissimilarity Effect01:26

Causes of Similarity-Dissimilarity Effect

The similarity-dissimilarity effect, a fundamental concept in social psychology, explains how interpersonal similarities and differences influence attraction and social interactions. This effect is supported by three key psychological perspectives: balance theory, social comparison theory, and consensual validation.Balance Theory and Cognitive ConsistencyBalance theory, developed by Fritz Heider, posits that individuals seek cognitive consistency in their relationships. When two people share...
Directional Terms01:14

Directional Terms

Directional terms are essential for describing the relative locations of different body structures. For instance, an anatomist might describe one band of tissue as "inferior to" another, or a physician might describe a tumor as "superficial to" a deeper body structure. These terms often use comparative terms in pairs to trace out the relative locations of one body part to another or descriptions of body tissues like the deeper ones from superficially present with reference to the body's upright...
Lobes of the Cerebrum01:22

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.

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Related Experiment Video

Updated: May 25, 2026

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
05:36

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Published on: November 16, 2017

Hemispheric asymmetries: the comparative view.

Sebastian Ocklenburg1, Onur Güntürkün

  • 1Department of Biopsychology, Institute of Cognitive Neuroscience, Ruhr-University Bochum Bochum, Germany.

Frontiers in Psychology
|February 4, 2012
PubMed
Summary
This summary is machine-generated.

Animal models reveal that brain asymmetries, crucial for cognition, are not unique to humans. Studying these lateralization mechanisms in vertebrates offers insights into our own brain development and function.

Keywords:
environmental factorsgeneticslateralizationontogenesispigeontectofugal pathwaythalamofugal pathwaywhite matter

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Area of Science:

  • Neuroscience
  • Comparative Psychology
  • Developmental Biology

Background:

  • Hemispheric asymmetries are fundamental to cognitive functions.
  • Historically, brain lateralization was considered a uniquely human trait.
  • Recent findings suggest asymmetries are widespread across vertebrate classes, implying an ancient evolutionary origin.

Purpose of the Study:

  • To explore the evolutionary origins and mechanisms of brain asymmetries.
  • To highlight the value of animal models in understanding human lateralization.
  • To review key research avenues in the study of brain lateralization.

Main Methods:

  • Overview of experimental approaches to study left-right brain differences.
  • Examination of sensory system connectivity asymmetries.
  • Analysis of embryonic determinants of brain asymmetries.
  • Investigation into the genetics of lateralization.

Main Results:

  • Evidence suggests brain asymmetries are conserved across vertebrates.
  • Research avenues provide insights into the developmental and genetic underpinnings of lateralization.
  • Animal models offer a powerful tool for dissecting the mechanisms of brain asymmetry.

Conclusions:

  • Brain asymmetries are likely inherited from common ancestors, not exclusive to humans.
  • Studying lateralization in diverse animal models can illuminate human cognitive functions.
  • Future research should leverage these comparative approaches to deepen our understanding of brain asymmetries.