Table 2

Morphologic parameters of apical (n = 88) and basal (n = 163) spines from complete mouse spines (group A)

Average ± STDMedianRange
Head volume (μm3)Apical0.1875 ± 0.140.14410.0151–0.9041
Basal0.1832 ± 0.130.14680.0161–0.7097
Neck length (μm)Apical0.5627 ± 0.330.49940.0195–2.4059
Basal0.5467 ± 0.310.4630.2074–2.2687
Neck diameter (nm)Apical295.86 ± 116288.0692.41–640.53
Basal278.55 ± 102267.188.61–676.45
  • Since neck diameters below the resolution limit (∼200 nm) cannot be visualized using LM, these values correspond to those spines that were completely visualized (60%). Extended Data Table 2-1 shows the morphologic parameters values for the complete and repaired spines (groups A, C, and D).