High-frequency (40 Hz) optogenetic stimulation of dDG excitatory neurons in dHP does not enhance interhemispheric rsfMRI connectivity. (A) rsfMRI connectivity maps of dHP, V1, A1, and S1 before (pre), during (during), and after (post) high-frequency optogenetic stimulation (Left) and the corresponding quantification of interhemispheric rsfMRI connectivity (Right). (B) Quantification of intrahemispheric rsfMRI connectivity.