Global functional connectivity density code

Global functional connectivity density (gFCD) refers to the number of connections that a specific grayordinate has with all other grayordinates in the brain network. It provides insight into the importance or centrality of a particular brain region within the network. Nodes with a high gFCD are considered hubs and may play crucial roles in integrating information across different brain regions. The matlab scripts were developed at NIAAA to map positive (gFCDp), negative (gFCDn), ipsilateral (igFCD) and contralateral (cgFCD) connectivity from fMRI datasets in CIFTI format such as those of the ABCD brain imaging data structure (BIDS) Community Collection (ABCC) (https://collection3165.readthedocs.io/en/stable/). The Code is provided "as is," without any warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose, and non-infringement. Developer/Owner makes no representations or warranties regarding the accuracy, reliability, or completeness of the Code or its suitability for any particular purpose. In no event shall Developer/Owner be liable for any direct, indirect, incidental, special, consequential, or punitive damages arising out of or in connection with the use or performance of the Code, even if Developer/Owner has been advised of the possibility of such damages.