Table 1

Quantification of different types of spine motility

Cell typeAgeSpines* (No. cells)% Motile spines% Spines emerge% Spines disappear% Spines “morph” + other% Spines elongate% Filopodia from spine
PurkinjeP10 + 2div464 (14)73.13.61.74515.212.9
P(19–22) + 2div427 (7)450.20329.53.5
Cortical pyramidalP0 + (7–11)div217 (11)73.65.24.15910.24.4
P0 + (12–17)div205 (9)55.80.40.445.65.84.4
P0 + (18–23)div247 (9)51.12.91.740.75.64.8
P17–19 Acute141 (7)39.71.11.036.12.01.6
Hippocampal pyramidalP0 + (9–12)div188 (9)63.75.81.149.410.14.2
  • *Scored spines include filopodia (see Discussion). 

  • All motile spines summed. 

  • Percent spines emerging and disappearing were calculated separately.