Schematic of averaged connection weights among anatomical subdivisions of the thalamus. Connection weights are displayed on an ordinal scale (stronger connections shown with thicker and darker arrows) according to their ranks in each panel. (A) Connections among the 3 thalamic subdivisions (THe, THv, and THd) on one side of the brain. (B) As A, but with the reticular thalamic nucleus (RT) visualized separately from the rest of its host subdivision, THv. (C) Both sides of the thalamus are shown with contralateral connections indicated from side 1 to side 2 only. For numerical comparison of connection weights see SI Appendix, Tables S1 and S2. THd, dorsal thalamus; THe, epithalamus; THv, ventral thalamus.