TABLE 5. Coronal suture strain during mastication (peak strains) and muscle stimulation1.
| Closing2 | |||
|---|---|---|---|
| Mastication | Tension2 | Compression2 | Opening2 |
| Ipsilateral | 278 ± 150 (7) | −160 ± 63 (8) | 365 ± 208 (10) |
| Contralateral | 269 ± 134 (8) | −151 ± 73 (8) | 373 ± 216 (10) |
| Stimulation | Ipsilateral | Contralateral | Bilateral |
| Masseter | 816 ± 435 (11) | 280 ± 319 (10) | 1,156 ± 557 (10) |
| 665 ± 337 (3)3 | 182 ± 279 (3)3 | 820 ± 389 (3)3 | |
| Temporalis | −111 ± 167 (3) | −22 ±98 (3) | −273 ± 256 (3) |
| Neck extensors | — | — | 699 ± 295 (4) |
1
με ± standard deviation (number of gages).
2
Because the coronal suture was strained during all phases of mastication, it was impossible to establish a definite baseline. The figures presented here should be considered as relative, not absolute, values. The most common pattern during ipsilateral mastication was early compression followed by late tension. For contralateral mastication, early tension was followed by late compression. However, some animals showed only compression (157, 160) or tension (158). All but one (164) exhibited tension during jaw opening. Values in the table are averages from all gages showing nonzero strain.
3
Subsample of three animals (157, 158, 167) that were also used for temporalis stimulations.