Table 2 Schedule of development of brain tracts and commissures in different anurans1 . (Fig. 1: pink triangles)
| Â | E. coqui | D. pictus | P. pustulosus 2 | X. laevis 3 |
|---|---|---|---|---|
Neural tube closure | TS 3 | GH 16–17 | ≤GH 20 | NF 204 |
Rhombomeres | TS 3+ | GH 18 | ? | ? |
Tract of postoptic commissure (TPOC) | TS 4 | GH 18 | ≤GH 20 | NF 245,6 |
Postoptic commissure (POC) | TS 5 | GH 20 | ≤GH 20 | NF 285 |
Ventral longitudinal tract (VLT) | TS 5 | GH 18 | ≤GH 20 | NF 266 |
Descending tract of V (TV) | TS 5 | GH 18 | ≤GH 20 | NF 266 |
Descending tract of VIII (TVIII) | TS 5 | GH 20 | ≤GH 20 | ? |
Tract of anterior commissure (TAC) | TS 6 | GH 20 | GH 22 | NF 306 |
Anterior commissure (AC) | TS 7 | GH 20 | GH 22 | NF 326,7 |
Supraoptic tract (SOT) | TS 6 | GH 20 | GH 20 | NF 326,7 |
Tract of posterior commissure (TPC) | TS 6 | GH 22 | GH 22 | NF 326,7 |
Posterior commissure (PC) | TS 6 | GH 22 | GH 24 | NF 326,7 |
Tract of commissure of posterior tuberculum (TCPT) | TS 6 | GH 22 | GH 22 | ? |
Commissure of posterior tuberculum (TCPT) | TS 6 | GH 22 | GH 22 | ? |
Tract of ventral tegmental commissure (TVTC) | TS 6 | GH 22 | GH 22 | NF 327 |
Ventral tegmental commissure (VTC) | TS 6 | GH 22 | GH 22 | NF 327 |
Tract of cerebellar commissure (TCC) | TS 6 | GH 20 | GH 22 | ? |
Cerebellar commissure (CC) | TS 7 | GH 23 | GH 24 | ? |
Dorsoventral diencephalic tract (DVDT) | TS 6 | GH 20 | GH 22 | NF 285,6 |
Tract of habenular commissure (THC) | TS 8 | GH 23 | GH 24 | NF 33/346 |
Habenular commissure (HC) | TS 8 | GH 23 | GH 24 | ? |
Intertectal commissure (ITC) | TS 98 | GH228 | GH 27–29 | ? |