Table 1.
Retinogeniculate fibers analyzed
| Age | Total number of side-branches | Total number of fibers analyzed | Mean preterminal axon length analyzed (μm) | Side-branches/(mm) | |
|---|---|---|---|---|---|
| Monkey | E77* | 37 | 22 | 422.4 | 3.9 |
| E85* | 33 | 29 | 460.2 | 2.4 | |
| E95* | 41 | 24 | 518.0 | 3.3 | |
| E112 | 20 | 17 | 722.4 | 1.6 | |
| Cat | E48* | 70 | 11 | 274.2 | 23.2 |
| E50* | 29 | 3 | 382.1 | 25.3 | |
| E54* | 101 | 10 | 321.0 | 31.4 | |
| E57 | 13 | 10 | 358.2 | 3.6 | |
| E65 | 22 | 9 | 537.6 | 4.5 |
Asterisks indicate the ages during the binocular overlap period. Data for fetal cat at E48, E54, E57, and E65 were derived from Sretavan and Shatz (1986), their Figs. 6, 7. The side-branches/mm measure was derived by dividing the total number of side-branches at each fetal age by the product of number of fibers analyzed and the mean length of fibers analyzed (×1000).