GraphVar: A user-friendly toolbox for comprehensive graph analyses of functional brain connectivity.
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2 GraphVar: A user-friendly toolbox for comprehensive graph analyses of functional brain connectivity. features: I. Pipeline construction of graph networks II. Calculation of network topological measures III. Generation of subject specific random networks IV. Perform statistical tests with a GLM framework V. Calculations on raw connectivity matrices (Network based statistics) VI. Parametric and non-parametric testing VII. Dynamic graph analyses (sliding windows) VIII. Interactive and visual results exploration Kruschwitz, J.D 1,2*, List, D. 1,2*, Waller, L. 2, Rubinov, M. 3, Walter, H 1. *equal contribution 1 Charité Universitätsmedizin, Berlin, Germany 2 Technische Universität Dresden, Dresden, Germany 3 University of Cambridge, Cambridge, United Kingdom
3 The Analysis Setup GUI
4 Setup panel
5 Workflows Statistical analyses (GLM) with clinical data
6 Calculate and export graph metrics Statistics on raw matrix Statistics with graph metrics Workflows
7 Setup panel (mouse over help)
8 Parallel Computing (with toolbox)
9 Underlying codes from the Brain Connectivity Toolbox (Rubinov and Sporns, 2010) Setup panel
10 General settings
11 Subject s Association Matrices Load (existing) Connectivity Matrices
12 Time course Time course Time course Time course Individual nodal time courses Node 1 Node 2 Node 3 Node n Generate Connectivity Matrices
13 Label nodes
14 Variable Selection
15 Network construction
16 Network nodes
17 Redefine Network (Subnetwork analyses)
18 Network thresholds
19 Subject specific null model networks
20 Network topological measures
21 Export network topological measures
22 Statistical analyses (GLM)
23 Non-parametric testing
24 Statistical analyses of graph measures
25 Statistics on the raw conn matrices
26 Network-Based-Statistics
27 Generate the Sliding Window matrices with the connectivity measure you desire: - Pearson corr - Partial corr - Covariance - Mutual inf - etc.. Create Connectivity matrix -> sliding windows
28 If SW-matrices are loaded (also manually via Select Subjects Corr Matrix ) the dynamic selection windows will appear in the GUI Select dynamic summary measure (graph metrics/raw matrix)
29 Dynamic summary measures*: - Variance - Standard deviation - Periodicity - PointProcess: rate - PointProcess: intervall - Brain-Network Variability * definition in Dynamic GraphVar Tutorial Select dynamic summary measure (graph metrics/raw matrix)
30 GraphVar will perform all the operations with respect to the dynamic summary measure: e.g. compute the variance of the clustering coefficient across the sliding windows and export or do group statistics on this measure Select dynamic summary measure (graph metrics/raw matrix)
31 Ready to go!
32 Status bar
33 The Results Viewer GUI
34 Results selection box
35 General functions panel
36 Correction for multiple comparisons
37 d: Difference between Group Means F(df1,df2): F-value d(b): Difference between Standardized Regression Weights b: Standardized Regression Weight t(df): t-value p: p-value m: Mean significant not-significant Interpreting GraphVar output
38 Association to dependent variable Thresholds One dimensional graph metrics
39 Non paramteric testing with random networks One dimensional graph metrics
40 Association to dependent variable Thresholds Network nodes Two dimensional graph metrics
41 Association to dependent variable Thresholds Network nodes Network nodes Three dimensional graph metrics
42 Association to dependent variable Network Thresholds level k Associations to Rich club coefficients
43 Export Results
44 Plot single subject association matrices
45 Plot mean connectivity matrix across subjects
46 Show graph component with Network Inspector Identify Graph Components
47 Network Inspector GUI
48 Identify Graph Components
49 Mouse over
50 Show association to dependent variable Show association strenght
51 Open directly in BrainNetViewer (Xia et al., 2013; PlosONE)
52 GraphVar -Team
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