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Related Concept Videos

Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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Related Experiment Video

Updated: Jun 19, 2026

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
17:06

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

Brain network dynamics underlying visuospatial judgment: an FMRI connectivity study.

Tom A de Graaf1, Alard Roebroeck, Rainer Goebel

  • 1Cognitive Neuroscience, Maastricht University, The Netherlands. tom.degraaf@maastrichtuniversity.nl

Journal of Cognitive Neuroscience
|October 7, 2009
PubMed
Summary
This summary is machine-generated.

This study reveals how the brain

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Modeling the Functional Network for Spatial Navigation in the Human Brain
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Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

Related Experiment Videos

Last Updated: Jun 19, 2026

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
17:06

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

Modeling the Functional Network for Spatial Navigation in the Human Brain
05:55

Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Functional imaging consistently shows bilateral fronto-parietal networks in visuospatial tasks.
  • Transcranial magnetic stimulation (TMS) suggests the right hemisphere network is crucial for visuospatial judgments.
  • Interactions within fronto-parietal networks for visuospatial processing remain poorly understood.

Purpose of the Study:

  • Investigate task modulation of functional and effective connectivity within the right fronto-parietal network during visuospatial judgments.
  • Examine directed influences and information flow within this network.
  • Identify specific brain regions and their roles in visuospatial processing.

Main Methods:

  • fMRI experiment with 10 healthy volunteers performing a visuospatial task (ANGLE) and a control task (COLOR).
  • Analysis of functional connectivity (regional time course correlations) and effective connectivity (directed influences).
  • Exploratory analysis of neighboring clusters within visuospatial regions.

Main Results:

  • Visuospatial task-specific activations observed in posterior parietal cortex (PPC) and middle/inferior frontal gyrus (MFG).
  • Task-modulated functional connectivity: higher PPC-MFG connectivity during ANGLE task.
  • Effective connectivity revealed frontal-to-parietal projections and thalamo-parietal influences to PPC.

Conclusions:

  • Visuospatial judgments rely on extensive fronto-parietal backprojections and thalamo-parietal influences.
  • The visuospatial network involves multiple stages and loops of information flow.
  • Differential involvement of neighboring clusters suggests complex processing within the network.