FIGURE 1.
Gender differences for mean fiber area compared by fiber type. There were overall large differences in mean fiber areas for the different fiber types, with types I and I/II hybrid being the largest and type II fibers being the smallest. In all comparisons male fiber types were significantly larger than female fiber types (P = .032).
Sciote et al. Human Masseter Muscle Fiber Type Properties. J Oral Maxillofac Surg 2012.