Table 1.

Effects of morphine on double-labeled cells (Fos, NK-1 receptor)

Groups	n	Total Fos	Fos in NK-1 R-negative cells	Fos in NK-1 R-positive cells	NK-1 R-positive and Fos-negative cells
SP i.t. + saline	5	57.1  ± 4.3	41.4  ± 3.3	15.7  ± 1.6	4.3  ± 3.1
SP i.t. + morphine	4	57.9  ± 9.9	39.9  ± 11.7	19.9  ± 4.5	2.2  ± 1.3

i.t., Intrathecal.