Table 1.
The average nerve fibre counts, nerve fibre densities, cross-sectional areas of nerves and nerve fibres for both sides of four cases at the inner ear and brain stem ends of the IAC of cochlear, facial, inferior vestibular and superior vestibular nerves
| Average no. of nerve fibres | Average cross-sectional areas of nerves (mm2) | Average cross-sectional areas of nerve fibres (µm2) | Average nerve fibre density (mm−2) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Case | Location | Nerve | R | L | R | L | R | L | R | L |
| 1 | Brainstem | C | 29453 ± 992 | 25154 ± 1036 | 2.09 ± 0.07 | 2.12 ± 0.06 | 62.3 ± 9.8 | 63.9 ± 13.3 | 14064 ± 22 | 11887 ± 800 |
| end | F | 11358 ± 1777 | 11306 ± 37 | 1.30 ± 0.18 | 1.30 ± 0.02 | 84.2 ± 5.7 | 83.8 ± 9.0 | 8893 ± 2587 | 8806 ± 1295 | |
| IV | 9440 ± 619 | 9268 ± 230 | 0.89 ± 0.14 | 0.88 ± 0.15 | 68.4 ± 3.2 | 69.4 ± 0.9 | 10651 ± 931 | 10740 ± 2041 | ||
| SV | 12481 ± 873 | 11614 ± 579 | 1.15 ± 0.07 | 1.16 ± 0.07 | 96.2 ± 4.1 | 94.1 ± 5.0 | 10865 ± 114 | 9995 ± 133 | ||
| Inner ear | C | 30640 ± 545 | 27700 ± 1773 | 1.78 ± 0.01 | 1.77 ± 0.00 | 31.9 ± 1.5 | 32.2 ± 0.4 | 17258 ± 438 | 15628 ± 967 | |
| end | F | 11818 ± 769 | 11748 ± 1207 | 1.32 ± 0.13 | 1.33 ± 0.14 | 56.7 ± 2.2 | 55.1 ± 0.6 | 8936 ± 263 | 8821 ± 12 | |
| IV | 8952 ± 139 | 8765 ± 904 | 0.71 ± 0.01 | 0.71 ± 0.00 | 39.3 ± 2.7 | 38.3 ± 8.7 | 12632 ± 388 | 12369 ± 1340 | ||
| SV | 12372 ± 449 | 11514 ± 2253 | 1.06 ± 0.07 | 1.05 ± 0.07 | 50.3 ± 2.8 | 50.6 ± 5.6 | 11706 ± 340 | 11060 ± 2930 | ||
| 2 | Brainstem | C | 23256 ± 580 | 28768 ± 825 | 2.19 ± 0.04 | 2.19 ± 0.03 | 71.0 ± 7.8 | 70.4 ± 11.1 | 10605 ± 72 | 13115 ± 551 |
| end | F | 10311 ± 612 | 12670 ± 194 | 1.35 ± 0.07 | 1.34 ± 0.02 | 87.6 ± 6.7 | 88.3 ± 4.2 | 7634 ± 37 | 9431 ± 317 | |
| IV | 9956 ± 579 | 10096 ± 480 | 0.95 ± 0.05 | 0.93 ± 0.03 | 74.5 ± 3.4 | 72.5 ± 1.2 | 10551 ± 1167 | 10926 ± 923 | ||
| SV | 11805 ± 344 | 12235 ± 473 | 1.22 ± 0.03 | 1.21 ± 0.06 | 98.0 ± 4.5 | 97.5 ± 2.8 | 9664 ± 532 | 10108 ± 109 | ||
| Inner ear | C | 25305 ± 433 | 29711 ± 814 | 1.80 ± 0.01 | 1.81 ± 0.03 | 34.7 ± 1.2 | 34.6 ± 2.8 | 14056 ± 170 | 16463 ± 724 | |
| end | F | 11047 ± 266 | 13247 ± 418 | 1.40 ± 0.03 | 1.37 ± 0.05 | 57.3 ± 3.0 | 57.4 ± 1.9 | 7869 ± 41 | 9670 ± 36 | |
| IV | 8958 ± 81 | 9315 ± 272 | 0.73 ± 0.03 | 0.73 ± 0.01 | 41.3 ± 1.6 | 44.2 ± 3.4 | 12217 ± 340 | 12687 ± 570 | ||
| SV | 11327 ± 512 | 11367 ± 1571 | 1.12 ± 0.03 | 1.12 ± 0.05 | 52.5 ± 2.4 | 51.9 ± 2.1 | 10112 ± 169 | 10199 ± 1856 | ||
| 3 | Brainstem | C | 23028 ± 1673 | 22859 ± 1582 | 2.16 ± 0.01 | 2.16 ± 0.07 | 62.8 ± 3.7 | 64.0 ± 5.9 | 10673 ± 735 | 10615 ± 1056 |
| end | F | 11769 ± 298 | 12065 ± 532 | 1.31 ± 0.05 | 1.33 ± 0.08 | 85.4 ± 4.6 | 85.6 ± 2.4 | 8997 ± 6585 | 9097 ± 163 | |
| IV | 8938 ± 263 | 8530 ± 452 | 0.86 ± 0.02 | 0.87 ± 0.08 | 68.2 ± 2.2 | 68.7 ± 1.1 | 10421 ± 585 | 9866 ± 357 | ||
| SV | 12255 ± 850 | 11122 ± 1253 | 1.20 ± 0.01 | 1.17 ± 0.03 | 92.8 ± 2.2 | 93.4 ± 2.6 | 10219 ± 6627 | 9508 ± 1282 | ||
| Inner ear | C | 27862 ± 1042 | 23657 ± 991 | 1.77 ± 0.02 | 1.77 ± 0.00 | 32.3 ± 1.4 | 31.7 ± 0.8 | 15731 ± 759 | 13380 ± 588 | |
| end | F | 12133 ± 327 | 12865 ± 424 | 1.37 ± 0.03 | 1.36 ± 0.06 | 54.1 ± 1.6 | 56.8 ± 0.5 | 8848 ± 16 | 9480 ± 127 | |
| IV | 8164 ± 276 | 8080 ± 177 | 0.71 ± 0.01 | 0.72 ± 0.01 | 36.3 ± 4.8 | 36.2 ± 4.4 | 11560 ± 520 | 11275 ± 26 | ||
| SV | 10376 ± 235 | 10705 ± 779 | 1.05 ± 0.04 | 1.06 ± 0.01 | 50.8 ± 0.4 | 50.5 ± 2.3 | 9845 ± 148 | 10074 ± 631 | ||
| 4 | Brainstem | C | 25292 ± 1826 | 23936 ± 958 | 2.01 ± 0.01 | 2.00 ± 0.02 | 59.4 ± 5.7 | 57.2 ± 7.1 | 12618 ± 1003 | 11978 ± 348 |
| end | F | 11840 ± 303 | 10122 ± 360 | 1.23 ± 0.04 | 1.22 ± 0.04 | 76.9 ± 1.9 | 76.8 ± 3.4 | 9655 ± 541 | 8333 ± 18 | |
| IV | 8401 ± 361 | 9041 ± 714 | 0.81 ± 0.02 | 0.83 ± 0.02 | 65.6 ± 1.8 | 66.9 ± 0.9 | 10408 ± 162 | 10883 ± 1133 | ||
| SV | 10390 ± 379 | 10566 ± 593 | 1.08 ± 0.03 | 1.11 ± 0.04 | 90.9 ± 2.6 | 91.2 ± 3.1 | 9614 ± 122 | 9488 ± 197 | ||
| Inner ear | C | 26558 ± 834 | 25751 ± 707 | 1.74 ± 0.08 | 1.75 ± 0.01 | 29.3 ± 1.2 | 30.3 ± 1.3 | 15260 ± 410 | 14742 ± 323 | |
| end | F | 11997 ± 558 | 10784 ± 356 | 1.23 ± 0.01 | 1.27 ± 0.04 | 51.4 ± 0.7 | 51.2 ± 1.5 | 9775 ± 572 | 8517 ± 18 | |
| IV | 8779 ± 519 | 8933 ± 250 | 0.69 ± 0.02 | 0.69 ± 0.02 | 35.6 ± 3.2 | 34.6 ± 3.8 | 12678 ± 324 | 12972 ± 65 | ||
| SV | 11481 ± 669 | 10720 ± 1197 | 1.00 ± 0.29 | 1.00 ± 0.03 | 49.6 ± 1.7 | 49.1 ± 0.8 | 11552 ± 1005 | 10678 ± 891 | ||
| Average | Brainstem | C | 25257 ± 2942 | 25179 ± 2530 | 2.11 ± 0.08 | 2.12 ± 0.09 | 63.9 ± 7.1 | 63.9 ± 8.9 | 11990 ± 1614 | 11899 ± 1098 |
| end | F | 11319 ± 978 | 11541 ± 1048 | 1.30 ± 0.09 | 1.30 ± 0.10 | 83.5 ± 5.8 | 83.6 ± 6.1 | 8795 ± 1288 | 8917 ± 666 | |
| IV | 9183 ± 716 | 9233 ± 712 | 0.88 ± 0.08 | 0.88 ± 0.07 | 69.2 ± 4.1 | 69.4 ± 2.3 | 10508 ± 618 | 10604 ± 1064 | ||
| SV | 11733 ± 1002 | 11384 ± 887 | 1.16 ± 0.07 | 1.16 ± 0.05 | 94.5 ± 4.0 | 94.0 ± 3.6 | 10090 ± 627 | 9775 ± 578 | ||
| Inner ear | C | 27591 ± 2190 | 26704 ± 2556 | 1.77 ± 0.02 | 1.77 ± 0.03 | 32.0 ± 2.3 | 32.2 ± 2.0 | 15576 ± 1282 | 15053 ± 1328 | |
| end | F | 11749 ± 597 | 12161 ± 1160 | 1.33 ± 0.09 | 1.33 ± 0.08 | 54.9 ± 3.0 | 55.1 ± 2.7 | 8857 ± 760 | 9122 ± 506 | |
| IV | 8713 ± 417 | 8773 ± 608 | 0.71 ± 0.02 | 0.71 ± 0.02 | 38.1 ± 3.5 | 38.3 ± 5.7 | 12272 ± 567 | 12326 ± 881 | ||
| SV | 11389 ± 843 | 11077 ± 1234 | 1.06 ± 0.06 | 1.06 ± 0.06 | 50.8 ± 1.9 | 50.5 ± 2.7 | 10804 ± 980 | 10503 ± 1437 | ||