Table 1. Expressions of c-Fos in the various brain areas after NORT.

Immunohistochemical staining of c-Fos 120 min after the NORT. Table showed the number of c-Fos positive cells in the PRh, Ent, CA1, CA2, CA3 and Cg/RS. Data were presented as the mean ± SEM. Statistical analyzes were performed as unpaired t-tests.

Area	Saline (n)	CNO(n)	P value
PRh (perirhinal cortex)	53±21　(5)	82±15　(5)	0.30
Ent (entorhinal cortex)	74±18　(5)	76±8.8　(5)	0.90
CA1	3.8±0.3　(3)	3.4±0.9　(4)	0.70
CA2	1.2±0.15　(3)	0.8±0.12　(4)	0.09
CA3	13±3.8　(3)	13±0.9　(4)	0.96
Cg/RS (cingulate/retrosplenial cortex)	100±24　(5)	143±25　(7)	0.27