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The working of the condyle of the lower jaw vertically and from side to side can be distinctly felt and seen in front of the ear. When the mouth is opened wide, the condyle advances out of the glenoid cavity, and returns to its socket when the mouth is shut. In front of the ear, lies the zygoma, one of the most marked and important landmarks to the touch, and in lean persons to the eye.
The apex of the heart is at a point about two inches below the left nipple and one inch to its sternal side. This point will be between the fifth and sixth ribs, and can generally be determined by feeling the apex beat. IV. Landmarks of a Few Arteries. The pulsation of the temporal artery can be felt in front of the ear, between the zygoma and the ear.
It is believed that the spout of the oil-can must have passed under the zygoma to the base of the skull, perforating the great wing of the spheroid bone and penetrating the centrum ovale, injuring the anterior fibers of the motor tract in the internal capsule near the genu."
The region chiefly affected in this poisoning is the jaw-bone, but the inflammation may spread to the adjoining bones and involve the vomer, the zygoma, the body of the spheroid bone, and the basilar process of the occipital bone.
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