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. 2012 Oct 3;109(42):17052-17057. doi: 10.1073/pnas.1204589109

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Fig. 4. — Classification of dendritic spines. (A) Examples of the velocity field in dendritic spines of Type I and II. Spines are indicated (red contour) with drift directions (colored arrows). (B) Schematic representation of the velocity fields in Type I and II spines. (C) Distribution of dendritic spines of Type I (arrowheads) and II (arrows)(scale bar, 5 μm). (D) Surface covered by Type I and II spines. (E) Diffusion coefficient. (F) Drift amplitude in the neck (19 spines of Type I, 12 spines of Type II).