Proportion of the different synaptic shapes in Layers II and III of the EC
| EC layer | Group | Type of synapse | Macular synapses | Perforated synapses | Horseshoe synapses | Fragmented synapses | Total synapses |
|---|---|---|---|---|---|---|---|
| II | Control | AS | 83.0% (1285) | 12.9% (200) | 3.3% (51) | 0.8% (13) | 100% (1549) |
| SS | 73.0% (100) | 11.0% (15) | 15.3% (21) | 0.7% (1) | 100% (137) | ||
| Alzheimer | AS | 80.6% (769) | 13.4% (128) | 4.9% (47) | 1.1% (10) | 100% (954) | |
| SS | 73.4% (66) | 12.2% (11) | 12.2% (11) | 2.2% (2) | 100% (90) | ||
| III | Control | AS | 75.9% (1326) | 19.9% (347) | 3.3% (58) | 0.9% (15) | 100% (1746) |
| SS | 65.9% (85) | 15.5% (20) | 17.0% (22) | 1.6% (2) | 100% (129) | ||
| Alzheimer | AS | 82.8% (806) | 10.2% (99) | 4.3% (42) | 2.7% (26) | 100% (973) | |
| SS | 73.9% (68) | 8.7% (8) | 10.9% (10) | 6.5% (6) | 100% (92) |
Data are given as percentages with the absolute number of synapses studied in parentheses. Data for individual cases are shown in Extended Data Table 4-1, Table 4-2.