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Related Concept Videos

Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...

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Related Experiment Video

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Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes
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Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes

Published on: January 19, 2024

Time-resolved influences of functional DAT1 and COMT variants on visual perception and post-processing.

Stephan Bender1, Thomas Rellum, Christine Freitag

  • 1Section for Clinical Neurophysiology and Multimodal Neuroimaging, Child and Adolescent Psychiatric Department, Technical University Dresden, Dresden, Germany. Stephan.Bender@uniklinik-dresden.de

Plos One
|July 31, 2012
PubMed
Summary

Genetic variants in dopamine transporter (DAT1) and catechol-O-methyltransferase (COMT) influence visual processing time. These dopamine inactivation genes specifically affect early visual potentials during a contingent negative variation (CNV) task in adolescents.

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Related Experiment Videos

Last Updated: May 20, 2026

Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes
09:27

Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes

Published on: January 19, 2024

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
13:00

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Published on: January 23, 2017

Area of Science:

  • Neuroscience
  • Genetics
  • Cognitive Psychology

Background:

  • Dopamine is crucial for attention and stimulus processing.
  • Investigated genetic influences on dopamine inactivation pathways.

Purpose of the Study:

  • Examine how dopamine transporter (DAT1) and catechol-O-methyltransferase (COMT) gene variants affect visual processing.
  • Utilize the contingent negative variation (CNV) task to assess these effects.

Main Methods:

  • Recorded 64-channel EEG from 195 healthy adolescents during a continuous performance task.
  • Assessed early and late CNV components and preceding visual evoked potentials.

Main Results:

  • Found significant additive effects of DAT1 and COMT on early occipito-temporal CNV.
  • Observed a trend towards interaction between DAT1 and COMT polymorphisms.
  • Early CNV generators identified in ventral visual and frontal regions; negative correlation between visual post-processing and frontal early CNV.

Conclusions:

  • Late visual potentials can image dopamine inactivation effects on visual processing.
  • Identified a specific time interval (500-1000 ms) affected by DAT1 and COMT.
  • Hypothesize shared dopaminergic mechanisms in visual and motor working memory encoding.