Table 2.

Effects of intracollicular bicuculline on collicular and dopaminergic responses to light flash stimuli

	SC Multiunit		DA Single Unit
	Prebicuculline	Postbicuculline	Prebicuculline	Postbicuculline
Baseline, Hz	220.0 ± 9.9	318.4 ± 33.1†	3.2 ± 0.4	3.5 ± 0.5
Latency, ms		46.0 ± 2.3		86.5 ± 5.3
Duration, ms		172.4 ± 14.6		164.7 ± 14.6
Magnitude		77.8 ± 10.9		1.0 ± 0.2

Values are means ± SE for parameters (baseline firing rate, response latency, response duration, and response magnitude, defined as the mean number of spikes per stimulus between response onset and response offset) of multiunit responses measured in the SC and single-unit responses measured in DA neurons in response to light flash stimuli, before and after intracollicular injections of bicuculline.

^†P < 0.01 with respect to predrug.