Table 1.
Morphological variables
| Variable | Definition |
|---|---|
| Axon diameter, μm | Average diameter from central end of axon to first branch point within epithelium (axons were followed as far centrally as possible, to soma if possible) |
| Surface area, μm2 | Total surface area of all processes from entry into epithelium |
| Volume, μm3 | Total volume of all processes from entry into epithelium |
| Total process length, μm | Total length of all processes from entry into epithelium |
| Nodes | Number of branch points; can be bi- or trifurcations |
| Ends | Number of end points (calyx or bouton) on terminal |
| Collecting area, μm2 | Area of convex polygon drawn around tips of distal dendrites |
| Boutons | Total number of varicosities on terminal (en passant and terminal) |
| Bouton diameter, μm | Average diameter of all varicosities on terminal |
| Bouton density | Boutons per collecting area |
| Distance between boutons, μm | Average (crow-fly) distance between all pairs of varicosities on terminal |
| Calyces | Total number of calyces (cups) on terminal |
| Distance between calyces, μm | Average (crow-fly) distance between all pairs of calyces on terminal |
| Calyces and boutons | Total of all calyces (cups) and varicosities on terminal |