. Elementary physiology . Fig. i6.—The pterygoid muscles from outside. (G. D. T.) \ The masseter muscle, the greater portion of the zygomatic arch, the temporal muscle with the coronoid process, and a large part of the ramus of the jaw have been removed, i, external pterygoid ; the figure is placed on the lower head; 2, internal pterygoid. The strong set of muscles which raise the lower jaw com- prise, on each side, the internal pterygoids (2, Fig. 16) on the inner side of the jaw, the masseters outside, and the temporals above (see i, Fig. 16). The action of the temporal and masseter muscles
. Elementary physiology . Fig. i6.—The pterygoid muscles from outside. (G. D. T.) \ The masseter muscle, the greater portion of the zygomatic arch, the temporal muscle with the coronoid process, and a large part of the ramus of the jaw have been removed, i, external pterygoid ; the figure is placed on the lower head; 2, internal pterygoid. The strong set of muscles which raise the lower jaw com- prise, on each side, the internal pterygoids (2, Fig. 16) on the inner side of the jaw, the masseters outside, and the temporals above (see i, Fig. 16). The action of the temporal and masseter muscles may be felt through the skin. The temporal, above and in front of the ear (on the temple), may be felt to contract by its swelling up as the jaw is moved upwards from an open position; the masseter may be similarly felt at the angle of the jaw, if the teeth are ground together after the jaw is closed. Each jaw is armed with a number of teeth, for the purpose
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