Table I.

Summary of Morphometric Analyses

		Control		Sense (S1)		Antisense (AS1)		Retinoic acid (RA)		RA + AS1		cAMP
No. of cells (n)		491		641		416		365		355		234
% of cells
bearing processes		19%		15%		26%		35%		36%		36%
% of processes that
are dendrite-like		39%		44%		2%		65%		2%		5%
Avg. length (μm) of
dendrite-like processes		37 ± 17		48 ± 27		41 ± 12		56 ± 32		35 ± 13		29 ± 12
% of processes that are
axon-like		58%		51%		88%		27%		76%		88%
Avg. length (μm) of
axon-like processes		36 ± 17		41 ± 13		46 ± 22		41 ± 27		46 ± 24		73 ± 52
% of processes that
are ambiguous		3%		5%		10%		8%		22%		7%
Avg. length (μm) of
ambiguous processes		25 ± 5		36 ± 8		32 ± 3		30 ± 17		37 ± 17		37 ± 15