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Related Concept Videos

Lateralization01:28

Lateralization

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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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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
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Latitudes and departures are essential concepts in surveying, providing a systematic way to analyze the projections of traverse lines. These projections allow surveyors to interpret a line's north-south and east-west components, which are crucial for precisely calculating areas, bearings, and lengths. Latitude is the north-south projection of a line, calculated as the product of the line's length and the cosine of its bearing. Departure, conversely, is the east-west projection obtained by...
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The first order operators using the del operator include the gradient, divergence and curl. Certain combinations of first order operators on a scalar or vector function yield second order expressions. Second-order expressions play a very important role in mathematics and physics. Some second order expressions include the divergence and curl of a gradient function, the divergence and curl of a curl function, and the gradient of a divergence function.
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Related Experiment Video

Updated: Nov 29, 2025

Assessment of Cerebral Lateralization in Children using Functional Transcranial Doppler Ultrasound fTCD
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Published on: September 27, 2010

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How many lateralities?

Michael C Corballis1

  • 1School of Psychology, University of Auckland, Auckland, New Zealand.

Laterality
|November 21, 2020
PubMed
Summary
This summary is machine-generated.

Cerebral asymmetry may not be a single trait, but rather multiple independent brain circuit lateralizations. This could explain links between brain lateralization and various neurological and psychiatric disorders.

Keywords:
Factor analysisgeneticslateralized brain circuits

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Cerebral asymmetry is often viewed as a single, unified characteristic.
  • Emerging evidence indicates that different brain circuits exhibit independent lateralization patterns.
  • This complexity challenges the search for a single 'laterality gene'.

Purpose of the Study:

  • To explore the concept of cerebral asymmetry beyond a unidimensional model.
  • To investigate potential explanations for the inconsistent findings in laterality gene research.
  • To propose a unifying hypothesis for the association between lateralization and various disorders.

Main Methods:

  • Review of existing literature on brain lateralization and genetics.
  • Analysis of evidence supporting independent lateralization of brain circuits.
  • Hypothesizing a potential source for invariant lateralization.

Main Results:

  • Cerebral asymmetry appears to involve independently lateralized brain circuits, not a single dimension.
  • The search for a single laterality gene is complicated by this independent lateralization.
  • A single, genetically invariant source (e.g., cytoplasmic) could underlie lateralization, influenced by multiple factors.
  • This model potentially explains the association of lateralization with dyslexia, schizophrenia, and mood disorders.

Conclusions:

  • Cerebral asymmetry is likely multidimensional, with independent lateralization of brain circuits.
  • A unifying, potentially non-genetic, source of lateralization may exist, influenced by various factors.
  • Understanding this complexity is crucial for explaining the link between brain lateralization and diverse disorders.