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Related Concept Videos

Neural Circuits01:25

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
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Long-term Potentiation01:25

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Related Experiment Video

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Inter-Brain Synchrony in Open-Ended Collaborative Learning: An fNIRS-Hyperscanning Study
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Long-range neural coupling through synchronization with attention.

Georgia G Gregoriou1, Stephen J Gotts, Huihui Zhou

  • 1Department of Basic Sciences, Medical School, University of Crete, Heraklion, Crete, Greece.

Progress in Brain Research
|September 8, 2009
PubMed
Summary

Attention guides our focus in busy scenes. The prefrontal (PFC) and posterior parietal (PPC) cortices likely direct this attention by synchronizing neural activity with visual areas, enhancing relevant information processing.

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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Area of Science:

  • Cognitive Neuroscience
  • Neurobiology
  • Visual Attention Research

Background:

  • Attention is crucial for selecting relevant stimuli in complex visual environments.
  • Top-down attentional feedback to visual cortex originates from prefrontal (PFC) and posterior parietal (PPC) cortices.
  • PFC and PPC are implicated in mediating attentional selection based on timing of signal processing.

Purpose of the Study:

  • To investigate the role of PFC and PPC in attentional selection.
  • To explore the neural mechanisms, including neural synchrony, underlying top-down attention.
  • To determine how neural synchrony between PFC/PPC and visual areas influences attentional modulation.

Main Methods:

  • Analysis of neurophysiological data from studies involving attention and visual processing.
  • Examination of signal processing timing in PFC, PPC, and extrastriate visual areas.
  • Investigation of neural synchrony and phase relationships between different cortical regions.

Main Results:

  • PFC and PPC process attention-related signals earlier than extrastriate visual areas.
  • Attentional selection is partly mediated by neural synchrony between PFC/PPC and early visual areas.
  • Specific phase relationships in neural synchrony appear optimized for enhancing top-down attentional input.

Conclusions:

  • PFC and PPC are key sources of top-down attentional control.
  • Neural synchrony plays a critical role in mediating attentional selection by facilitating communication between higher-order and visual cortical areas.
  • The findings elucidate the neural basis of how attention modulates visual perception.