Coordinating fibers of the swimmeret system
| Tract2-a | Name2-1002 | n | Home Ganglion | Region2-c | Direction | Phase | Size |
|---|---|---|---|---|---|---|---|
| Medial ascending | A44 | 1 | A4 | 78 | Ascending | Late PS | Medium |
| A45 | 1 | A5 | 78 | Ascending | Late PS | Medium | |
| Anon | 1 | ? | 78 | Ascending | PS | Small | |
| Lateral ascending | A31 | 1 | A4 | 81 | Ascending | Late PS | Medium |
| A35 | 1 | A5 | 81 | Ascending | Late PS | Medium | |
| Medial descending | Anon | 2(?) | ? | 76 (near 78) | Descending | RS | Small |
↵F2-a Stein (1969) named the three tracts. From his description, the medial ascending tract and medial descending tracts are not widely separated, and both ascending and descending impulse traffic could sometimes be recorded with the same suction electrode.
↵F2-1002 Wiersma and Hughes (1961) assigned names to units that they found repeatedly in different preparations. These authors did not address the possibility that some of these units were axons of homologous neurons that originated serially in each ganglion.
↵F2-c Wiersma and Hughes (1961) used a standard grid to describe the locations of axons in the intersegmental connectives. These numbers are useful guides to the positions of these units.
Anon, Tract not named; ?, unknown or uncertain.