Table 1.

Mean (±SEM) head-down sniffing counts of DMSO- and EEDQ-treated adult rats (n = 8–9 per group) on time blocks 9–16 (Experiment 1)

Treatment Condition	Head-Down Sniffing
DMSO / 0 μg NPA	0.64 (±0.19)
DMSO / 20 μg NPA	10.38 (±0.86)*†
EEDQ / 0 μg NPA	0.42 (±0.07)
EEDQ / 20 μg NPA	4.61 (±0.84)*

Head-down sniffing values represent mean scores per 5-min time block during the final 40-min testing phase.

^*Significantly different from the DMSO / 0 μg NPA vehicle group;

^†Significantly different from EEDQ-treated rats infused with 20 μg NPA (i.e., the EEDQ / 20 μg NPA group)