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. Author manuscript; available in PMC: 2020 Sep 1.
Published in final edited form as: Arch Oral Biol. 2019 May 20;105:35–45. doi: 10.1016/j.archoralbio.2019.05.015

Table 3.

Means (± standard deviations) and one-tailed significance tests for differences in superficial masseter and temporalis fiber lengths and PCSAs between occluded and gaped sides.1

M. fascicularis M. mulatta
Measurements Occluded side Gaped side %Change P-value Occluded side Gaped side %Change P-value
Superficial Masseter
 Anterior Lf (mm) 10.2±0.7 19.4±3.5 88.7 0.006 18.8±3.9 37.7±8.9 100.1 0.013
 Posterior Lf (mm) 9.6±0.5 17.4±0.9 81.9 0.002 11.4±2.2 18.9±2.1 66.5 0.016
 PCSA (cm2) 3.6±0.9 2.0±0.4 42.8 0.016 7.3±1.8 4.2±0.6 43.0 0.027
Temporalis
 Anterior Lf (mm) 11.2±0.6 19.6±3.5 74.6 0.006 26.8±3.3 36.6±4.6 36.6 0.041
 Posterior Lf (mm) 12.2±2.3 18.8±1.3 54.3 0.005 30.0±5.5 41.8±5.5 39.2 0.006
 PCSA (cm2) 9.9±0.7 6.3±1.0 36.7 0.004 15.6±2.1 11.4±1.8 27.2 0.012
1

%Change represents the % increase in fiber length, and the % decrease in PCSA, in the gaped compared with the occluded sides.