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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Functionally specialized spectral organization of the resting human cortex.

Wenjun Bai1, Okito Yamashita2, Junichiro Yoshimoto3

  • 1Department of Computational Brain Imaging Advanced Telecommunication Research Institute International (ATR), Kyoto, Japan.

Neural Networks : the Official Journal of the International Neural Network Society
|February 2, 2025
PubMed
Summary

The human cortex exhibits specialized spectral gradients, revealing a close link between its spectral and functional organization at rest. This study uncovers frequency-specific brain networks and profiles, enhancing our understanding of brain organization.

Keywords:
Cortical organizationResting-state functional networksSpectral analysis of fMRI datafMRI signal processing

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Area of Science:

  • Neuroscience
  • Brain Imaging
  • Systems Neuroscience

Background:

  • The human cortex shows hierarchical organization along spectral and functional axes at rest.
  • The interplay between spectral and functional cortical organization is not well understood.

Purpose of the Study:

  • To investigate the relationship between spectral and functional organization in the human cortex.
  • To explore functional specialization within spectral gradients of the cortex.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) data acquired during rest.
  • Applied a novel temporal de-correlation method to enhance spectral resolution.
  • Analyzed spectral gradients to identify regional frequency biases and functional specialization.

Main Results:

  • Identified functionally specialized spectral gradients across the cortex.
  • Discovered frequency-specific resting-state functional networks.
  • Revealed functionally distinctive spectral profiles and an intrinsic, specialized coordinate system.

Conclusions:

  • Spectral and functional cortical organizations are closely related in the resting human brain.
  • Spectral gradients provide a framework for understanding functional specialization.
  • The findings offer new insights into the intrinsic organization of the human cortex.