Table 5.
Mean (standard deviations) of muscle ratios (FE; MES) and MFI of PS, ES and M for humans and sheep in their respective age categories
| Human | Sheep | ||||
|---|---|---|---|---|---|
| Young | Mature | Immature | Young | Mature | |
| Ratios | |||||
| FE | 0.42 (0.07) | 0.36 (0.09) | 0.38 (0.04) | 0.45 (0.07) | 0.46 (0.03) |
| MES | 0.39 (0.04) | 0.36 (0.05) | 0.17 (0.01) | 0.16 (0.04) | 0.15 (0.02) |
| MFI (%) | |||||
| PS left | 37.65 (4.11) | 36.73 (4.56) | 36.75 (4.66) | 32.45 (3.83) | 37.72 (7.16) |
| PS right | 33.20 (2.47) | 32.42 (2.13) | 31.87 (4.02) | 26.12 (5.94) | 36.44 (6.77) |
| M left | 42.46 (4.47) | 42.11 (4.74) | 52.01 (4.81) | 54.90 (5.10) | 76.90 (17.49) |
| M right | 38.28 (2.79) | 39.75 (3.20) | 48.61 (5.44) | 55.68 (17.63) | 73.34 (9.23) |
| ES left | 42.56 (5.30) | 40.49 (3.97) | 50.15 (7.20) | 49.67 (4.96) | 60.17 (7.40) |
| ES right | 35.97 (2.48) | 37.40 (2.01) | 43.41 (5.51) | 42.53 (8.92) | 54.64 (7.19) |
ES, erector spinae; FE, ratio of flexor to extensor muscle volume; M, multifidus; MES, ratio of multifidus to erector spinae volume; MFI, muscle fatty infiltrate; PS, psoas.