Template connectome harmonics for FreeSurfer template cortical surfaces using Gibbs Tractography Dataset

The folder contains connectome harmonics for template surface meshes cvs_avg35_inMNI152, fsaverage45 and fsaverage5 from Freesurfer, using the Gibbs connectome tractography streamlines.
The connectome harmonics framework is integrated to the SCRIPTS pipeline, and the files present here use default parameters from Table 1 in Naze et al. 2020.

Each .mat file include:
- graph Laplacian (L)
- connectome harmonics (H)
- connectome harmonics projected in the Desikan-Killiany atlas (H_DSK)
- local connectivity adjacency matrix (A_local)
- long-range connectivity adjacency matrix (A_ctx)
- vertices and faces of the cortical surface mesh (white matter -  gray matter boundary)
- degree matrix (of combined adjacency matrices)
- eigenvalues of the eigendecomposition
- r, the ratio of local connections over all connections (local_vs_global_ratio)
- average (mu_cc) and standard deviation (sigma_cc) of the long-range connectome
- z_C, the weight threshold applied to the high resolution conectome to obtain its adjacency matrix (ta_zsc)

Reference:
Naze S., Proix T., Atasoy S. & Kozloski J.R. (2020) Robustness of connectome harmonics to local gray matter and long-range white matter connectivity changes. Neuroimage.

本文件夹包含来自Freesurfer的模板表面网格cvs_avg35_inMNI152、fsaverage45与fsaverage5的连接组谐波（connectome harmonics），数据采用Gibbs连接组束追踪流线（Gibbs connectome tractography streamlines）生成。

连接组谐波框架已集成至SCRIPTS分析流水线，此处提供的文件均采用Naze等人2020年发表的表1中的默认参数。

每个.mat格式文件包含以下字段：
- 图拉普拉斯矩阵（graph Laplacian, L）
- 连接组谐波（connectome harmonics, H）
- 投射至Desikan-Killiany脑图谱（Desikan-Killiany atlas）的连接组谐波（H_DSK）
- 局部连通性邻接矩阵（local connectivity adjacency matrix, A_local）
- 远程连通性邻接矩阵（long-range connectivity adjacency matrix, A_ctx）
- 大脑皮层表面网格的顶点与面片（对应白质-灰质边界）
- 组合邻接矩阵对应的度矩阵（degree matrix）
- 特征分解得到的特征值
- r：局部连接占总连接的比例（local_vs_global_ratio）
- 远程连接组的均值（mu_cc）与标准差（sigma_cc）
- z_C：对高分辨率连接组施加权重阈值以得到其邻接矩阵的阈值（ta_zsc）

参考文献：
Naze S.、Proix T.、Atasoy S. 与 Kozloski J.R. (2020) 连接组谐波对局部灰质及远程白质连通性变化的鲁棒性. 《神经图像》(Neuroimage).