Schematic representation of the neurochemical connectome.

(a) Connectogram of the 125-node cerebral connectome partitioned in 19 large-scale brain regions. With 18.36%, the gamma-aminobutyric acid-ergic (GABAergic) neuronal connections constitute the dominant chemical components (b) followed by dopaminergic subnetwork 15.37% (c), serotoninergic connections 13.47% (d), glutamate system 10.75% (e), and enkephalinergic connections 7.76% (f).