Table 1.

The Correlation of Dendritic Arbor Length with Morphological and Cytoskeletal Parameters

Cell Type	MT Quantity	F-act Quantity	MT + F-act Quantity	Path Distance from Soma	Branch Order	Diameter
Class I	0.67	0.55	0.62	−0.47	−0.33	0.64
Class IV	0.79	0.43	0.63	−0.45	−0.42	0.49
Class IV Form3OE	0.88	0.76	0.82	−0.47	−0.39	0.61

Pearson correlation coefficients (R-values) of arbor length against morphological and cytoskeletal parameters at the resolution of single (2 μm long) compartments. Microtubule quantity is the best predictor of arbor length for all analyzed cell groups. See also Table S1 and S4 and Figures S4, S7, and S8.