Table 2.

Numbers of W, NR and REM bouts following Hcrt-1 infusion.

Parameter	Group	Time Period	Dose of Hcrt-1 (μg)
			0	10	30
Number of W bouts
	Young	Hrs 1–6	92.25±4.39	73.40±5.13+	77.64±4.84+
		Hrs 7–12	138.25±10.23▴	132.25±11.93▴	122±3.24▴
	Old	Hrs 1–6	118.56±7.57	110.51±5.03	110.6±5.08
		Hrs 7–12	138.8±6.50▴	126.9±4.23▴	131.1±5.29▴
Number of NR bouts
	Young	Hrs 1–6	92.5±4.6	73.2±4.3+	77.4±4.8+
		Hrs 7–12	139.0±10.5▴	132.8±11.7▴	123.0±3.2▴
	Old	Hrs 1–6	118.6±7.5	110.3±5.0	110.5±5.0
		Hrs 7–12	139.6±6.1▴	127.7±4.1▴	131.4±5.0▴
Number of REM bouts
	Young	Hrs 1–6	14.5±2.3+	2.0±1.4*+	2.3±1.7*+
		Hrs 7–12	21.0±4.6+	28.0±2.1*+▴	20.8±2.9+▴
	Old	Hrs 1–6	24.7±1.8	21.1±3.9	18.6±4.1
		Hrs 7–12	33.4±1.3▴	36.8±2.2▴	37.5±3.7

^*p<0.05 relative to vehicle;

⁺p<0.05 between age groups;

^▴p<0.05 early vs. late light or dark period within age group.