Table 1.

Laminal distribution of apoptotic cells

Group	I–II	III–IV	V–VI
Saline bolus	0.5 ± 0.3	0.2 ± 0.2	0.3 ± 0.3
10 μg MS bolus	8.7 ± 0.6^*	0.3 ± 0.1	1.1 ± 0.3^1-160
20 μg MS bolus	10.7 ± 1.3^1-165	0.5 ± 0.1	1.6 ± 0.4^1-160
Saline infusion	0.4 ± 0.2	0.2 ± 0.2	0.2 ± 0.4
10 nmol·μl⁻¹·hr⁻¹ MS	8.1 ± 1.5^*	0.4 ± 0.3	0.6 ± 0.3
20 nmol·μl⁻¹·hr⁻¹ MS	11.9 ± 0.7^1-165	0.6 ± 0.1	0.9 ± 0.4^1-160

The data represent the mean ± SE number of apoptotic cells in a given group averaged from five or six sections per rat.
↵* p < 0.01;
↵F1-160 p < 0.05, compared with the saline group,
↵F1-165 p < 0.01 compared with both saline and 10 μg or 10 nmol·μl⁻¹·hr⁻¹ morphine (MS) groups.