Here's the referenced journal article...
"Cliques of Neurons Bound into Cavities Provide a Missing Link between Structure and Function"
https://www.frontiersin.org/articles/10.3389/fncom.2017.0004...
NB: The supplementary material PDF has graphs showing dimensions 0 through 7 (note the zero-based indexing so that's 8 total dimensions). https://www.frontiersin.org/article/10.3389/fncom.2017.00048...