HCP Young Adult

Beta Release of Group-ICA maps, Node timeseries, and Network matrices

Author: Jenn Elam
Published: Sep 02, 2014
Study: HCP Young Adult

The Human Connectome Project (HCP) WU-Minn consortium is pleased to announce a beta-release of Resting-state fMRI (rfMRI) analyses on the HCP 500 Subjects data released in June 2014. This rfMRI data was processed, using data from all 468 subjects having four rfMRI runs, yielding the following outputs:Netmat_Fig

  • A group-average “parcellation”, obtained by means of group-ICA (independent component analysis).
  • Subject-specific sets of “node timeseries” – for each subject, a representative time series per ICA component (“parcel” node).
  • A subject-specific “parcellated connectome”or “netmat” – for each subject, a nodes x nodes matrix – the functional connectivity between node timeseries.

As a shorthand, we are calling this rfMRI analysis dataset the HCP 500 Subjects Parcellation, Timeseries, Netmats Release, or “HCP 500 Subjects PTN Release”, for short.

These rfMRI analyses are being “beta” released because the analysis methods used are still works-in-progress and may be improved in the future. We encourage the community to look at the released data and discuss the methods and results.

What’s in the HCP 500 Subjects PTN Release? The data is available as a single package release containing:

  • Group-ICA “parcellations” at five different dimensionalities (levels of detail), including spatial-ICA maps for each distinct ICA decomposition dimensionality and volumetric MNI152 3D-space projected versions of the spatial-ICA maps, primarily for display purposes.
  • Node-timeseries (individual subjects), estimated by 2 distinct timeseries estimation approaches for each group-ICA dimensionality.
  • Netmats (parcellated connectomes). Full and partial correlation netmats for each subject and at the group-level (all subjects) for each choice of group-ICA dimensionality and node timeseries estimation approach.

A summary document for the HCP 500 Subjects PTN Release is included in the released package. It contains details about methods used in these analyses, descriptions of released files, example MATLAB/FSLNets code, and references.

Access the HCP 500 Subjects PTN Release data on the HCP website. Download the dataset on the WU-Minn HCP 500 Subjects project page on ConnectomeDB under the HCP500 Parcellation + Timeseries + Netmats (PTN) heading.

Have more questions?  We encourage you send your questions to hcp-users@humanconnectome.org and join the hcp-users discussion group (http://www.humanconnectome.org/contact/#subscribe), so that you can tune in to technical discussions on issues that may be of interest.