Regional ΔFosB+ cell counts in air, CO2-L and
CO2-H mice. Significant alterations in ΔFosB+ cell counts
were observed in multiple brain areas: Increased cell counts were observed in
(A) basolateral amygdala (BLA), (B) central
nucleus of amygdala (CeA), (C) prelimbic cortex (PL),
(F) bed nucleus of stria terminalis (BNST) of CO2-H
mice. (D) Significantly reduced cell counts were observed in
CO2-H mice within the infralimbic cortex (IL). (E)
Reductions were also observed within the dorsal dentate gyrus (dDG). No
significant differences were noted within the (G) nucleus accumbens
(NAc) and (H) ventral dentate gyrus (vDG). Data are mean ±
SEM. *p < 0.05 CO2-H versus air,
p < 0.05 CO2-L versus air.