Table 1.

Number and mean weight of experimental groups.

Group	n	Body weight (g) at end of testing
Males
WT-Saline	12	28.0 ± 0.7
WT-Meth	12	30.4 ± 0.6
5-HT1A KO-Saline	12	28.8 ± 0.7
5-HT1A KO-Meth	16	29.6 ± 0.5
Females
WT-Saline	12	22.4 ± 0.3
WT-Meth	13	22.3 ± 0.3
5-HT1A KO-Saline	16	22.5 ± 0.4
5-HT1A KO-Meth	11	23.4 ± 0.4

Genotype: 5-HT_1A knockout (KO) or wild-type (WT).

Pretreatment: saline or methamphetamine (Meth).

Body weight: mean (±SEM).