2 research outputs found
Embedding of Functional Human Brain Networks on a Sphere
Human brain activity is often measured using the blood-oxygen-level dependent
(BOLD) signals obtained through functional magnetic resonance imaging (fMRI).
The strength of connectivity between brain regions is then measured and
represented as Pearson correlation matrices. As the number of brain regions
increases, the dimension of matrix increases. It becomes extremely cumbersome
to even visualize and quantify such weighted complete networks. To remedy the
problem, we propose to embedded brain networks onto a hypersphere, which is a
Riemannian manifold with constant positive curvature