Table 1.
Distribution of fiber types in normal and cross-innervated sternohyoid (SH) and thyroarytenoid (TA) muscles
| SH |
TA (external division) |
|||||
|---|---|---|---|---|---|---|
| Fiber type | Normal | Cross-innervated | Normal | Cross-innervated | ||
| Slow | 9.0 ± 0.4 | 6.7 ± 1.0 | 0 | 0 | ||
| Slow/2a | 1.1 ± 0.2 | 1.9 ± 0.2 | 0 | 0 | ||
| 2a | 24.2 ± 3.8 | 17.2 ± 0.8 | 0 | 0 | ||
| 2a/2x | 0.5 ± 0.5 | 1.2 ± 0.1 | 0 | 0 | ||
| 2x | 20.8 ± 2.4 | 37.8 ± 1.9** | 0 | 4.2 ± 1.3* | ||
| 2x/2b | 0 | 0.5 ± 0.3 | 0 | 0.2 ± 0.1 | ||
| 2b | 44.4 ± 2.5 | 34.9 ± 3.2 | 0 | 0.4 ± 0.2 | ||
| 2b/eo | 0 | 0 | 100 ± 0 | 95.3 ± 1.4* | ||
Symbols indicate statistically significant differences between cross-innervated and normal muscles (*p<0.02, **p<0.002, t-tests). Values are mean percentages ± SEM, n=4.