Tetrode electrode implantation surgery and data collecting
We used the Self-made movable bundles of the 32-channel tetrode electrode (Song et al. , 2020) to target the hippocampus CA1 (AP 2 mm; ML 1.8 mm and DV 1.1 mm) of the anesthetized mice on the stereotactic frame. The local field potentials (LFP) value refers to the real-time potential under the sampling frequency of 1000 Hz which is digitized by the Plexon OmniPlex Neural Data Acquisition System (Plexon, USA), and analyzed by NeuroExplorer Version5.306 (Nex Technologies, USA).