Table 2.

Cell counts and mean discharge rates during the sleep-waking cycle of state-dependent and state-unrelated ventral tuberomammillary neurons in histidine decarboxylase knock-out mice.

	Cell type	Number (percentage) of recorded neurons	Mean discharge rate (±SEM)
			AW	QW	D	SWS	PS	H	P
1	W-active	12 (17.4%)
	a. W-specific	10 (14.5%)	4.04 ± 0.39	3.04 ± 0.42	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	40.8	<0.0001
	b. non-W-specific	2 (2.9%)	6.72 ± 0.61	6.67 ± 1.42	1.74 ± 1.41	0.28 ± 0.28	1.83 ± 0.52	–	–
2	W/PS-active	9 (13.0%)	6.27 ± 0.94	5.15 ± 0.77	1.38 ± 0.50	1.44 ± 0.84	4.23 ± 1.37	19.4	<0.001
3	Sleep-active	36 (52.2%)
	a. SWS-active	2 (2.9%)	5.54 ± 3.79	6.37 ± 3.22	10.84 ± 5.95	14.66 ± 7.62	8.53 ± 6.88	–	–
	b. SWS/PS-active	25 (36.2%)	0.92 ± 0.37	0.82 ± 0.31	1.58 ± 0.40	2.94 ± 0.58	5.29 ± 1.01	52.7	<0.00010
	c. PS-specific	3 (4.3%)	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	0.62 ± 0.38	3.71 ± 1.96	13.4	<0.01
	d. Low rate (<1 Hz)	7 (10.1%)	0.02 ± 0.02	0.03 ± 0.03	0.15 ± 0.11	0.46 ± 0.11	0.78 ± 0.07	24.2	<0.0001
4	Unrelated	11 (15.9%)	14.06 ± 7.34	8.46 ± 3.46	8.88 ± 4.03	8.03 ± 3.13	8.96 ± 3.03	0.99	0.91
	Total	69

Statistical analysis was carried out using the Kruskal–Wallis test.