. The anatomical record. Anatomy; Anatomy. 2 3 Fig. 2 Drawing of base of skull to show articulating surfaces for mandible. The broad oval area on the left of the figure is the pathological troughlike sur- face, articulating with the right condyle, shown in figure 1. The narrower oval of the opposite side of the skull is almost normal, although neither articulating surface extends as far back as the Glaserian fissure (shaded). Fig. 3 Drawing of right side of skull. This shows the flattened articular surfaces of the pathological right jaw-joint, which allow the condyle to move forward and backwa
. The anatomical record. Anatomy; Anatomy. 2 3 Fig. 2 Drawing of base of skull to show articulating surfaces for mandible. The broad oval area on the left of the figure is the pathological troughlike sur- face, articulating with the right condyle, shown in figure 1. The narrower oval of the opposite side of the skull is almost normal, although neither articulating surface extends as far back as the Glaserian fissure (shaded). Fig. 3 Drawing of right side of skull. This shows the flattened articular surfaces of the pathological right jaw-joint, which allow the condyle to move forward and backward only in a straight line. The line of pull of the lower head of the external pterygoid muscle makes an angle of about five degrees with that of the joint surfaces, and is so directed as to pull the mandible against the skull during contraction. of forty degrees to the other side of the sagittal plane. These lateral and mesial strains are exactly met, and in proper propor- tion, by the two sloping surfaces of the condyle as they are applied against the sides of the trough in which thej^ run. I further noticed that, although the surfaces of the condyle of an ordinary skull did not show these suggestive angles, if I placed an artificial meniscus above it—one molded in wax, fit- ting exactly that particular specimen—then the same significant slopes were seen in a transverse section of the condyle plus its meniscus. While the study of this specimen perhaps adds little that is entirely new to our knowledge of the jaw-joint, it certainly gives very tangible proof of certain conditions, ordinarily not readily Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; Am
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
