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. 2020 Apr 20;11:1906. doi: 10.1038/s41467-020-15648-4

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Time-lapse STED imaging of a spine (magenta) and a node (green) over 150 min acquired every 30 min. While contacting node can move on the spine surface, the overall contact is maintained. b Comparison between spine motility index and contacting nodes. Motility index of the node was significantly higher than that of spines (n = 18 structures from 5 slices; Paired t-test, ****p (two-tailed) < 0.0001). c Changes of coverage state over time normalized to the coverage state at 0 min (n = 18 spines from 5 slices). d Correlation between fluctuation (the temporal variance of coverage fraction) and spine head area (n = 18 spines from 5 slices; Spearman r = −0.5947, p (two-tailed) = 0.0092. Large node/large spine contact was more stable. e Correlation between spine head size and spine motility index. Large spines were less motile than small spines (n = 18 spines from 5 slices; Pearson R² = 0.24, p (two-tailed) = 0.039).