Nervous and mental diseases . aso-occipital curve, and binau-ricular curve should be taken with a strip of lead, or, what is better,with the instrument devised by Luys (on the principle of the hattersconformateurs), and the curves projected on paper. Dolichocephalic heads, as a rule, have narrow, and brachycephalichave broad, faces. Something should here be said concerning prog-nathism, of which there are several forms. The best method of deter-mining it is to measure the angle made by a line drawn from the nasalroot to the junction of the inferior nasal spine and alveolar process(Fig. 277, iV
Nervous and mental diseases . aso-occipital curve, and binau-ricular curve should be taken with a strip of lead, or, what is better,with the instrument devised by Luys (on the principle of the hattersconformateurs), and the curves projected on paper. Dolichocephalic heads, as a rule, have narrow, and brachycephalichave broad, faces. Something should here be said concerning prog-nathism, of which there are several forms. The best method of deter-mining it is to measure the angle made by a line drawn from the nasalroot to the junction of the inferior nasal spine and alveolar process(Fig. 277, x) with a vertical line dropped from the nasal root toBrocas horizontal. It is found that every normal skull exhibits thissubnasal prognathism, but there is a wide variation in degree. Extra-ordinary prognathism, orthognathism, and opisthognathism—meaningextreme projection, straightness, or inclination backward of the sub-nasal line—are pathological. The empirical greatest height of the head is an approximate measure-. Ofo B/NAUR/Cl/LAR-D/AM-Fig. 276.
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Keywords: ., bookcentury1900, bookdecade1910, bookid, booksubjectnervoussystem
