Table 1.
Reference number (#), position of the soma within the SNR, and extension of the dendritic arborizations of the neurons labeled in the various sensorimotor subdivisions of the rat SNR
| Subdivision | Neurons | |||||||
|---|---|---|---|---|---|---|---|---|
| # | Soma position (%) | Extension of dendritic field (in μm) | ||||||
| R-C | L-M | D-V | R-C | M-L | D-V | Thickness | ||
| Dorsal lamina | 4 | 31 | 25 | 26 | 720 | 696 | 336 | 336 |
| 12 | 30 | 36 | 7 | 600 | 672 | 330 | 330 | |
| Dorsolateral lamina | 8g | 53 | 25 | 23 | 909 | 852 | 600 | 153 /255 |
| 35d | 65 | 10 | 28 | 720 | 252 | 564 | 252 | |
| Central core | 6 | 40 | 27 | 25 | 584 | 684 | 456 | |
| 8d | 53 | 24 | 25 | 800 | 408 | 360 | ||
| 11d | 79 | 21 | 27 | 450 | 492 | 408 | ||
| 13g | 54 | 27 | 42 | 415 | 714 | 564 | ||
| 14g | 64 | 27 | 26 | 550 | 504 | 510 | ||
| 14d | 75 | 23 | 25 | 500 | 576 | 564 | ||
| 15d | 61 | 25 | 43 | 960 | 672 | 566 | ||
| 28 | 60 | 25 | 43 | 733 | 720 | 560 | ||
| 35g | 53 | 16 | 43 | 550 | 600 | 384 | ||
| Pericore lamina (facial sector) | 5d | 25 | 37 | 51 | 450 | 1116 | 492 | 115 /384 |
| 9 | 13 | 40 | 65 | 489 | 1416 | 336 | 163 /250 | |
| 13d | 18 | 31 | 65 | 900 | 852 | 588 | 125 /588 | |
| 15g | 61 | 43 | 67 | 840 | 552 | 552 | 105 /221 | |
| 24d | 43 | 41 | 68 | 800 | 768 | 480 | 115 /192 | |
| 26 | 32 | 20 | 75 | 576 | 1056 | 528 | 134 /288 | |
| 27 | 37 | 15 | 66 | 583 | 1002 | 528 | 67 /240 | |
| 30 | 44 | 39 | 63 | 900 | 1032 | 492 | 173 /355 | |
| 39 | 51 | 31 | 80 | 1050 | 678 | 276 | 96 /211 | |
| Pericore lamina (limb sector) | 11g | 55 | 53 | 67 | 650 | 972 | 264 | 67 /115 |
| 18 | 64 | 52 | 60 | 600 | 720 | 390 | 125 /390 | |
| 19 | 26 | 54 | 73 | 850 | 648 | 408 | 192 /408 | |
| 20 | 35 | 53 | 70 | 841 | 948 | 672 | 144 /288 | |
| 33 | 65 | 40 | 76 | 660 | 552 | 408 | 96 /408 | |
| 50 | 23 | 57 | 80 | 600 | 888 | 444 | 125 /444 | |
| Pericore lamina (oculomotor sector) | 10 | 35 | 59 | 66 | 1233 | 1488 | 1170 | 180 /360 |
| 21 | 62 | 70 | 70 | 1010 | 1212 | 780 | 221 /780 | |
| 22g | 31 | 43 | 46 | 350 | 948 | 390 | 96 /180 | |
| Lateral lamina | 23 | 30 | −14 | 23 | 960 | 500 | 417 | 348 /500 |
| 36 | 52 | 5 | 51 | 840 | 648 | 645 | 120 /432 | |
| 37n1 | 28 | −12 | 40 | 800 | 481 | 224 | 388 /555 | |
| 37n2 | 36 | 6 | 41 | 830 | 432 | 429 | 159 /600 | |
| Ventral lamina | 5g | 55 | 50 | 95 | 634 | 1140 | 456 | 101 /144 |
| 22d | 33 | 16 | 88 | 614 | 924 | 270 | 96 /163 | |
| 24g | 35 | 12 | 74 | 950 | 925 | 444 | 96 /228 | |
| 34 | 79 | 21 | 80 | 741 | 926 | 456 | 96 /150 | |
The position occupied by the somata of the labeled neurons is indicated as a percentage of the length of the nucleus along the rostrocaudal (R-C), lateromedial (L-M), and dorsoventral (D-V) axes. A minus sign along the lateromedial axis (neurons 23 and 37n1, lateral lamina) indicates that the neurons were lying beyond the lateral border of the SNR, within the pars lateralis. The thickness of the dendritic arborization was measured on neurons presenting a flat discoid or elliptic shape (see Materials and Methods). Two values are given for neurons with thickness that differed markedly in opposite regions of the dendritic field.