Table 3.

Correlations between MRI metrics and cognitive performance in the chronic stress period.

Brain area	NOR-2 results	MRI metrics	Control	Stress
Amygdala	DI	Vol	R = −0.186	R = 0.665*
Anterior commissure	HI	FA	R = 0.079	R = −0.614*
	HI	RD	R = 0.063	R = 0.603*
Inferior colliculus	DI	FA	R = −0.172	R = 0.666*
	DI	MD	R = 0.028	R = 0.669*
	DI	AD	R = −0.024	R = 0.733*
	HI	AD	R = 0.160	R = 0.649*

NOR-2, novel object recognition test performed few days after the end of the chronic stress exposure; DI, discrimination index; HI, habituation index; AD, axial diffusivity; FA, fractional anisotropy; MD, mean diffusivity; RD, radial diffusivity; Vol, volume; R, Pearson's correlation coefficient;

^*p < 0.05.