Table 7.

Distance traveled (activity [arbitrary units]; mean ± 1 SD) until ataxia and nose down

	15% CO2	30% CO2	50% CO2	100% CO2	Isoflurane	Pentobarbital– phenytoin	P
Ataxia activity	458 ± 606	334 ± 96.7b	168.5 ± 157.4a,b	148.4 ± 81.3a,b	723 ± 734	766 ± 411	<0.0001
Ataxia activity/s	6.5 ± 9.8b	7.0 ± 5.7ab	5.3 ± 4.4a,b	6.2 ± 3.5a,b	24.3 ± 27.8	22.7 ± 10.8	<0.0001
Nose down activity	627 ± 673b	574 ± 382b	273 ± 185.2a,b	181.4 ± 109.8a,b	835 ± 267	2043 ± 674	<0.0001
Nose down activity/s	6.1 ± 6.6b	8.4 ± 5.9b	5.7 ± 3.4a,b	5.7 ± 3.4a,b	14.0 ± 4.8	22.0 ± 9.9	<0.0001

CO₂ data have been published previously.²

^aSignificantly different from isoflurane.

^bSignificantly different from pentobarbital–phenytoin.