Figure 4.

Unstructured positioning of insertion points with different volume and lengths filters. A, Example of a basal dendritic segment. B, Insertion point of spines (white dots) in the same dendritic segment as in A. C, D, Straightening (C) and unrolling (D). E–H, Selective visualization of unfolded positioning of small (<0.3 μm³), large (>0.5 μm³), short (<1 μm), and long (>2 μm) spines using volume (E, F) and length (G, H) filters. I, Example of basal dendrite with insertion points of dendritic spines (black dots) along the distance from soma. J, K, Straightening (J) and unrolling (K) of I.