SST and Alzheimer disease: In DMSO-injected control SST-Cre and PV-Cre mice, optogenetic activation of SST interneurons (Online resource Fig. 3) and PV interneurons (Online resource Fig. 4) also enhanced the peak power of theta and gamma oscillations, respectively, further supporting that distinct subtypes of interneurons are selectively involved in theta and gamma oscillations in both AD and the healthy brain.