Table 2.

Parametric (Pearson’s r_p) and nonparametric (Spearman’s r_s) correlations analysis results. Correlation assessment performed between glutamate and GABA levels obtained in biochemical ELISA tests and MTR and CEST contribution calculated at 3.0 ppm in the cortex and hippocampus of the stressed group (*p < 0.05, **p < 0.01 and ***p < 0.001).

			Glutamate level	GABA level
			Pearson's rp	Pearson's rp	Spearman's rs
Hippocampus	MTR: 3.0 ppm	0.5 µT	0.73*	0.55
		0.75 µT	− 0.14	0.72*
	CEST contribution: 3.0 ppm	0.5 µT	0.33	0.62*
		0.75 µT	0.40	0.76*
Cortex	MTR: 3.0 ppm	0.5 µT	0.83**		− 0.30
		0.75 µT	0.92***		0.11
	CEST contribution: 3.0 ppm	0.5 µT	0.49		0.60
		0.75 µT	0.37		0.03