Table 2.

Correlations between IEG RNA levels within a structure

Structure	IEG 1	IEG 2	Rs value
Hippocampus	Arc	zif268	0.67
	Arc	c-fos	0.46
	zif268	c-fos	0.55
Entorhinal cortex	Arc	zif268	0.77
	Arc	c-fos	0.74
	zif268	c-fos	0.64
Visual cortex	Arc	zif268	0.97
	Arc	c-fos	0.77
	zif268	c-fos	0.75

The Spearman correlation coefficients are given; comparisons significant at p < 0.05 are indicated in bold font. The above values were calculated for all of the trained rats of Figures4 and 5 (n = 18 rats); the caged control rats were not included in the analyses. See Results for details.