Table 2.

Effects of LHb stimulation on the spontaneous activity on non-DA neurons in the ventral midbrain

Initial response	Secondary response	n (%)	Firing rate (Hz)	Initial response		Secondary response
				Latency (ms)	Duration (ms)	Duration (ms)
Fast excitation	Inhibition	24	15.4 ± 4.4	3.2 ± 0.2	5.1 ± 1.0	43.3 ± 4.6
Excitation		28	9.2 ± 1.2	18.7 ± 2.2	26.3 ± 4.5
Excitation	None	10		22.8 ± 5.2	34.6 ± 10.8
Excitation	Inhibition	18		16.4 ± 1.7	21.6 ± 3.3	79.5 ± 12.1
Inhibition		22	12.0 ± 2.9	12.5 ± 2.2	37.1 ± 5.3
Inhibition	None	13		14.0 ± 3.2	40.6 ± 6.5
Inhibition	Excitation	9		10.4 ± 3.0	32.0 ± 9.3	36.1 ± 6.5
No response		25	12.9 ± 2.2
Total		99