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Related Experiment Video

Updated: May 8, 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

Linking human brain functional connectivity to underlying neurotransmission.

Leon D Lotter1,2,3, Golia Shafiei4,5,6, Daouia Larabi7

  • 1Institute of Neuroscience and Medicine (INM-7: Brain and Behaviour), Research Centre Jülich; Jülich, Germany.

Biorxiv : the Preprint Server for Biology
|May 7, 2026
PubMed
Summary

Neurobiology significantly influences brain functional connectivity. This study reveals how neurotransmitter receptor distribution shapes brain networks, impacting functions from arousal to psychosis.

Keywords:
MEGPETbrain networkconnectomefMRIfunctional connectivityneurotransmitternoradrenalineresting-state

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Last Updated: May 8, 2026

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Area of Science:

  • Neuroscience
  • Neuroimaging
  • Systems Biology

Background:

  • Understanding the neurobiological basis of brain functional systems is challenging.
  • Brain function relies on complex interactions within and between neural networks.
  • Existing methods struggle to link in vivo neurobiology with large-scale brain activity.

Purpose of the Study:

  • To develop a topological framework for quantifying the link between neurobiology and brain functional connectivity.
  • To investigate how neurotransmitter systems modulate brain networks.
  • To explore alterations in functional connectivity in clinical populations.

Main Methods:

  • Utilized resting-state functional magnetic resonance imaging (rsfMRI) and magnetic encephalography (MEG) across multiple healthy adult cohorts.
  • Applied a topological framework to associate regional neurobiology (neurotransmitter receptor/transporter distribution) with functional connectivity.
  • Examined pharmacological and clinical samples to assess sensitivity to neurotransmitter manipulation and alterations in early psychosis.

Main Results:

  • Regional variation in rsfMRI connectivity strongly correlates with neurotransmitter receptor and transporter distribution.
  • Low-frequency rsfMRI synchronization is modulated by decreased receptor/transporter availability, while high-frequency MEG synchronization increases with availability.
  • Noradrenergic modulation of a specific sensorimotor-posterior-insular network was identified and linked to autonomic arousal.
  • Associations were altered in patients with early psychosis, correlating with clinical symptoms.

Conclusions:

  • A novel framework successfully links underlying neurobiology to the functional connectome (NEOFC).
  • Neurotransmitter systems play a critical role in shaping brain functional organization.
  • Findings offer biological insights into typical brain function and alterations in psychiatric conditions like psychosis.