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Transcranial brain atlas.

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We developed a transcranial brain atlas (TBA) to map brain labels onto the scalp surface. This visual tool aids in precisely placing transcranial devices for brain imaging and stimulation studies.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Traditional brain atlases are crucial for interpreting neuroimaging data like MRI and PET.
  • Transcranial techniques require accurate scalp-based localization of brain regions.
  • Existing methods lack a direct, visual link between scalp surface and detailed brain atlases.

Purpose of the Study:

  • To introduce the Transcranial Brain Atlas (TBA), a novel probabilistic map from scalp to brain atlas labels.
  • To provide a framework for building TBAs that integrates scalp and brain information.
  • To demonstrate the utility of TBAs in guiding transcranial device placement and enhancing transcranial studies.

Main Methods:

  • Developed a continuous proportional coordinate system for standardized scalp surface representation.
  • Created a high-resolution, 114-participant scalp-to-brain space mapping for cranio-cortical correspondence.
  • Employed a two-step Markov chain to project traditional brain atlas labels onto the scalp surface.

Main Results:

  • Established a framework for generating reproducible and predictive TBAs.
  • Demonstrated the ability of TBAs to make subsurface brain labels visible on the scalp.
  • Successfully applied TBAs in a functional near-infrared spectroscopy (fNIRS) experiment for a finger-tapping task.

Conclusions:

  • TBAs offer a straightforward, visual method for guiding transcranial device placement.
  • TBAs can significantly support brain mapping efforts using transcranial techniques.
  • This approach bridges the gap between scalp coordinates and detailed brain organization for non-invasive neuroscience.