Table 1.

Motor measures acquired in an open field and anxiety-like/motor measures acquired in a light-dark transition task from Tat(−) and Tat(+) males that were exposed (or not) to a 15-min forced swim stress prior to administration of saline or oxycodone. * indicates a main effect of genotype wherein Tat(+) mice differ from Tat(−) controls. † indicates a main effect for oxycodone to differ from saline administration, p ≤ 0.05.

Behavioral Measure	Non-Stressed				Stressed
	Saline (0.9% w/v)		Oxycodone (3 mg/kg)		Saline (0.9% w/v)		Oxycodone (3 mg/kg)
	Tat(−) (n = 8–9)	Tat(+) (n = 7–8)	Tat(−) (n = 12)	Tat(+) (n = 8–9)	Tat(−) (n = 8)	Tat(+) (n = 9)	Tat(−) (n = 8)	Tat(+) (n = 9)
Mean Velocity (m/s)	0.025 ± 0.004	0.027 ± 0.002 *	0.048 ± 0.008 †	0.076 ± 0.009 †*	0.005 ± 0.001	0.002 ± 0.001	0.012 ± 0.003 †	0.015 ± 0.004 †
Rearing number	39.4 ± 6.2	23.8 ± 3.2	18.1 ± 11.4 †	6.8 ± 2.2 †	4.5 ± 2.4	0.9 ± 0.7	0.8 ± 0.3	0.7 ± 0.2
Rearing Time (s)	31.13 ± 4.74	20.31 ± 2.58 *	3.66 ± 1.56 †	2.14 ± 0.92 †*	2.61 ± 1.53	0.63 ± 0.60	0.29 ± 0.15	0.19 ± 0.09
Latency to first enter dark (s)	61 ± 32	28 ± 19	14 ± 4	22 ± 9	77 ± 45	89 ± 36	63 ± 38	37 ± 33
Light zone time (s)	106 ± 32	17 ± 5 *	75 ± 17	43 ± 9 *	102 ± 40	121 ± 27	112 ± 32	30 ± 5
Number of transitions	9 ± 3	5 ± 1 *	13 ± 2	8 ± 1 *	9 ± 3	7 ± 1	13 ± 3	11 ± 3