Fig. 1.

Illustration of the zygomatic arch, masseter muscle and strain gauge locations. (A) Lateral view of a pig skull showing the location of the squamosal (sq) and zygomatic (zy) bones, and the position of attaching masseter muscle. The shaded area and arrow show the location of muscle fibers that were removed to test the hypothesis that growth of the zygomatic flange is in response to pull from the masseter. (B) Close-up of the zygomatic arch in lateral and medial view showing the location of rosette strain gauges. The hatched area in the medial view represents the articular eminence of the squamosal bone.