Table 1.

Summary of experimental design and animal groups

Group	Construct a growth-promoting pathway		Assessments				Total
Group	At the injury gap	At the caudal host cord	Beh + BDA	FG	EM	E-phy	Total
1	SCs-GDNF	DMEM	n = 5	n = 3	n = 1	n = 5	n = 14
2	SCs-GDNF	SCs-GFP	n = 7	n = 3	n = 1	n = 5	n = 16
3	SCs-GDNF	SCs-GDNF	n = 7	n = 4	n = 4	n = 6	n = 21

BDA, biotinylated-dextran amine; Beh, behavior; EM, electron microscopy; FG, Fluoro-Gold; E-phy, electrophysiological recording.