This is Video S1 and it corresponds to Figure 2A. It shows that local blebbistatin micropipetting, but not DMSO, increases spine formation and extension (arrowheads). Equal volumes of blebbistatin and...

This is Video S2 which corresponds to still images in top row of Figure 2D. It shows the spine dynamics of control neurons. Time-lapse confocal imaging was performed on DIV14 hippocampal neurons co-ex...

This is Video S3,which corresponds to still images in bottom row of Fig. 2D. It shows that knocking down levels of Myosin II B (MIIB) increases spine dynamics. Spines from MIIB knockdown neurons exten...