. Author manuscript; available in PMC: 2009 Sep 1.

Published in final edited form as: Dev Biol. 2008 Jun 21;321(1):216–226. doi: 10.1016/j.ydbio.2008.06.021

Table 3.

Early exogenous RA promotes axon growth into the hindlimb

	DMSO/Control	RA/Control
	(n = 6)	(n = 19)
Length of “fan”	1.1 ± 03^#	1.4 ± 0.3^**
Area of “fan”	1.0 ± 0.1^#	1.2 ± 0.2^**

The longest incursion of axons (length of “fan”) and the total arborization of axons in the crural plexus (area of “fan”) were measured in limbs in St. 23.5–25 embryos implanted with RA-soaked or control (DMSO-soaked) beads at St. 19–22.5, as described in Materials and Methods and Fig. 5B. The same number of sections was analyzed in treated and control limbs of individual embryos; values in each embryo were compared for significance with a paired t-test. Early exposure to exogenous RA significantly promoted axon growth into treated limbs

p > 0.05

^**

p < 0.001.