Table 1.

Effects of baclofen, GHB and muscimol on the behaviour in GABA_B(1)^+/+, GABA_B(1)^+/− and GABA_B(1)^−/− mice

Genotype	Behavioural effect (mean±s.e.m., n)
	Baclofen	GHB	Muscimol
GABAB(1)+/+	2.0±0.1(11)	4.5±0.0(9)	1.8±0.4(8)
GABAB(1)+/−	1.7±0.3(12)	4.3±0.2(11)	1.8±0.5(9)
GABAB(1)−/−	0.0±0.0(9)*	0.0±0.0(14)*	Not assesseda

Values are means+s.e.m. (n).

^*P<0.01, GABA_B(1)^+/+ vs GABA_B(1)^−/− (Mann–Whitney U-test).

^aCould not be assessed due to a qualitative change in behaviour.