Table 4. Recalculated muscle forces (N) simulating muscle proportions of each rodent on the other two skulls.
| Skull | Squirrel | Guinea pig | Rat | |||
| Muscle proportions | Guinea pig | Rat | Squirrel | Rat | Squirrel | Guinea pig |
| Superficial masseter | 15.67 | 7.00 | 8.23 | 5.59 | 8.75 | 13.33 |
| Anterior deep masseter | 4.66 | 9.35 | 7.59 | 10.80 | 7.47 | - |
| Posterior deep masseter | 7.06 | 13.51 | 8.07 | 6.00 | ||
| Anterior ZM | 6.90 | 1.36 | 5.50 | 1.09 | 5.85 | 5.87 |
| Posterior ZM | 2.04 | 1.21 | 1.61 | 0.97 | 1.72 | 1.73 |
| Infraorbital ZM | - | - | 7.02 | 7.48 | - | 3.97 |
| Temporalis | 5.34 | 11.24 | 3.35 | 8.98 | 3.56 | 4.54 |
| Internal pterygoid | 10.28 | 8.75 | 8.20 | 7.00 | 8.73 | 8.74 |
| External pterygoid | 3.25 | 2.77 | 2.63 | 2.21 | 2.79 | 2.76 |
| Total | 55.20 | 55.20 | 44.13 | 44.13 | 46.94 | 46.94 |
Abbreviations: ZM, zygomatico-mandibularis.