AP	anteroposterior
CE	reference electrode
CH	the cohousing mice
DV	dorsoventral
LFP	local field potential
LMeA and RMeA	the left and right medial amygdala
LmPFC and RmPFC	the left and right medial prefrontal cortex
LSD	least significant difference
LVMH and RVMH	the left and right ventromedial hypothalamus
MeA	medial amygdala
ML	mediolateral
mPFC	medial prefrontal cortex
NA	not applicable
PBS	phosphate-buffered saline
PC	piriform cortex
PFA	paraformaldehyde
PFC	prefrontal cortex
SI	the socially isolated mice
VMH	ventromedial hypothalamus
VMHvl	ventrolateral subregion of VMH