Table 1.
Summary of Rat Latissimus Dorsi Muscle Functional Measurement Data at 12 Weeks Postinjury
| Treatment groups | Contralateral control | NR | Low (1 kPa) | Medium (3 kPa) | High (10 kPa) |
|---|---|---|---|---|---|
| Sample size (n) | 32 | 8 | 8 | 8 | 8 |
| BW at explant (g) | — | 417.4 ± 45.88a | 449.6 ± 45.18a | 433.7 ± 28.52a | 431.6 ± 27.25a |
| Wet weight (g) | 2.10 ± 0.17a | 1.70 ± 0.16b | 1.98 ± 0.16a | 1.97 ± 0.17a | 1.95 ± 0.21a |
| L0 (mm) | 69.09 ± 4.71a | 74.63 ± 5.21b | 70.88 ± 3.23a | 73.00 ± 4.63a | 71.75 ± 5.31a |
| PCSA (mm2) | 28.99 ± 3.47a | 21.48 ± 2.90b | 26.40 ± 2.74a | 25.59 ± 2.59a,b | 25.94 ± 4.83a,b |
| Isometric force parameters | |||||
| Pt (N) | 0.52 ± 0.25a | 0.34 ± 0.13a | 0.38 ± 0.19a | 0.47 ± 0.12a | 0.34 ± 0.17a |
| P0 (N) | 3.28 ± 0.40a | 2.11 ± 0.58b | 2.33 ± 0.64b | 2.69 ± 0.42b | 2.11 ± 0.63b |
| Specific P0 (mN/mm2) | 115.1 ± 19.9a | 101.1 ± 32.5a,b | 90.0 ± 30.0a,b | 105.8 ± 16.4a,b | 86.0 ± 35.8b |
Values are presented as mean ± SD. Statistical differences were analyzed using Tukey's post-hoc test after performing a one-way ANOVA. Values with the same letter were not significantly different (p > 0.05), while values with dissimilar letters were significantly different (p < 0.05). Peak twitch response (Pt) and maximal isometric contraction force (P0) were measured by ex vivo direct electric stimuli (0.2 ms, 30 V). Measured P0 was normalized to PCSA to determine specific force (specific P0).
—, analysis not applicable to contralateral control; ANOVA, analysis of variance; BW, body weight; L0, muscle length; NR, no repair; PCSA, physiological cross-sectional area; SD, standard deviation.