Locations of spinules in the middle of stratum radiatum of mature rat hippocampus (area CA1)
| Emerging from | Engulfed by | Engulfing membrane coated | ||||
|---|---|---|---|---|---|---|
| Spinule | Number | Percentage | Number | Percentage | Number | Percentage |
| Dendritic spine | 219 | 86.2% | 1 | 0.4% | 1 | 100% |
| Axon | 31 | 12.2% | 229 | 90.2% | 162 | 71% |
| Dendritic shaft | 3 | 1.2% | 0 | 0.0% | 0 | 0% |
| Nonsynaptic protrusion | 1 | 0.4% | 0 | 0.0% | 0 | 0% |
| Astrocytic process | 0 | 0.0% | 21 | 8.3% | 8 | 38% |
| Growth cone | 0 | 0.0% | 3 | 1.2% | 3 | 100% |
| Total | 254 | 100.0% | 254 | 100.0% | 174 | 69% |