Table 1. Quantification of hindbrain neurons traced from the spinal dorsal horn with AAV2retro.eGFP and CTb.

The number in each column is the total number of cells counted for each group, with the range of cells counted for each animal in parentheses. For percentages, the average value is presented with the range for each animal given in parentheses.

Brain region	Subset	GFP only	Ctb only	GFP +Ctb +	%GFP only	%Ctb only	%GFP +Ctb +
RVM (all neurons)	-	99 (11–57)	679 (149–319)	279 (65–134)	9.1 (4.0–12.1)	65.6 (59.7–73.3)	25.3 (22.7–28.1)
RVM (TPH2 +neurons)	All	5 (0–4)	269 (63–123)	62 (12–25)	1.5 (0–5.1)	80.1 (76.1–83.1)	18.5 (15.2–22.9)
	LPGi	5 (0–4)	79 (16–44)	35 (7–15)	4.2 (0–14.8)	66.4 (54.3–77.2)	29.4 (22.8–42.9)
	NRM	0 (0–0)	143 (37–63)	15 (4–6)	0 (0–0)	90.5 (87.8–94.0)	9.5 (6.0–12.2)
	Other	0 (0–0)	47 (10–21)	12 (0–8)	0 (0–0)	79.7 (66.7–100)	20.3 (0–33.3)