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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: May 18, 2026

Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis
10:33

Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis

Published on: June 20, 2012

Finding thalamic BOLD correlates to posterior alpha EEG.

Zhongming Liu1, Jacco A de Zwart, Bing Yao

  • 1Advanced Magnetic Resonance Imaging Section, Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA. liuz5@mail.nih.gov

Neuroimage
|September 19, 2012
PubMed
Summary
This summary is machine-generated.

The thalamus, particularly the pulvinar, is crucial for generating alpha brain rhythms. Different thalamic nuclei influence these rhythms through distinct functional networks, impacting visual processing and arousal.

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Related Experiment Videos

Last Updated: May 18, 2026

Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis
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Combined Invasive Subcortical and Non-invasive Surface Neurophysiological Recordings for the Assessment of Cognitive and Emotional Functions in Humans
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Combined Invasive Subcortical and Non-invasive Surface Neurophysiological Recordings for the Assessment of Cognitive and Emotional Functions in Humans

Published on: May 19, 2016

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Alpha brain rhythms (8-13 Hz) are key during wakefulness, originating mainly in posterior cortical areas.
  • The thalamus's role in generating and modulating these alpha rhythms is debated.
  • Understanding thalamic involvement is vital for comprehending brain activity.

Purpose of the Study:

  • To investigate the relationship between thalamic blood oxygenation level dependent (BOLD) signals and spontaneous alpha rhythm modulation.
  • To clarify the specific roles of different thalamic nuclei in alpha rhythm generation.

Main Methods:

  • Concurrent electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) were used during a resting-state, eyes-closed condition.
  • Correlation analyses were performed between thalamic BOLD signals and posterior alpha power.
  • Functional connectivity analysis of fMRI data was conducted.

Main Results:

  • Negative correlations between alpha modulation and BOLD signals were found in the visual thalamus, especially the pulvinar.
  • Positive correlations were observed in anterior and medial dorsal thalamic nuclei.
  • The pulvinar showed functional connectivity with visual cortical areas, while dorsal nuclei connected to brainstem and cingulate cortex.

Conclusions:

  • The visual thalamus, particularly the pulvinar, plays a significant role in generating and modulating posterior alpha rhythms via widespread cortical interactions.
  • Anterior and medial dorsal thalamic nuclei may indirectly influence alpha rhythms by modulating vigilance and arousal.