Table 1.
Values used to calculate the PCSA and maximum force of the jaw closer muscles.
| muscle | mass (g) | fibre length (cm)a | PCSA (cm2) | max. force (N) |
|---|---|---|---|---|
| superficial masseter | 2.0 | 0.8 | 2.4 | 60.9 |
| posterior deep masseter | 0.3b | 0.7 | 0.4 | 10.3 |
| ant. zygo.mandibularis | 0.5b | 0.8 | 0.6 | 15.0 |
| post. zygo.mandibularis | 0.3 | 0.7 | 0.4 | 10.5 |
| temporalis | 1.1 | 0.8c | 1.5 | 37.1 |
| medial pterygoid | 1.5 | 0.6 | 2.5 | 62.3 |
| lateral pterygoid | 0.3 | 0.3 | 0.4 | 9.8 |
aTaken from Weijs & Dantuma [32].
bEstimated using muscle volume and specific density.
cFibre length of the deep temporalis.