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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 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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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.
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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Related Experiment Video

Updated: Dec 7, 2025

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
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Lateralization, functional specialization, and dysfunction of attentional networks.

Paola Mengotti1, Anne-Sophie Käsbauer1, Gereon R Fink2

  • 1Cognitive Neuroscience, Institute of Neuroscience & Medicine (INM-3), Forschungszentrum Jülich, Jülich, Germany.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|September 30, 2020
PubMed
Summary

This review examines attention systems, challenging old models and exploring lateralization. It discusses stroke-related attention deficits and novel brain stimulation therapies.

Keywords:
DisconnectionFronto-parietal networkInterhemispheric competitionSpatial attentionSpatial neglect

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Reviews the established bilateral dorsal and right-lateralized ventral attention systems.
  • Critically examines evidence for left parietal cortex involvement in attention.
  • Presents findings on pathways connecting dorsal and ventral attention networks.

Purpose of the Study:

  • To review current understanding of attention system lateralization and functional specialization.
  • To explore clinical relevance for stroke-induced attentional dysfunction.
  • To discuss novel therapeutic approaches for attention deficits.

Main Methods:

  • Literature review of recent findings on attention systems.
  • Analysis of studies on spatial, feature-based, object-based, and motor attention.
  • Examination of predictive coding frameworks and stroke-related disruptions.

Main Results:

  • Challenges the initial assumptions about dorsal and ventral attention system lateralization.
  • Highlights the role of the left parietal cortex and interhemispheric balance.
  • Presents promising results from transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS).

Conclusions:

  • Attention system lateralization is more complex than previously thought.
  • Stroke significantly disrupts attention networks, impacting interhemispheric balance.
  • Brain stimulation techniques offer new therapeutic avenues for attentional dysfunction.