Nervous and mental diseases . 3tNAUR/C(/LAR-D/AM. ff/Fig. Fig. 277. ment of the distance between the basion and vertex of the skull (Bto /?, or U). A line from the external occipital protuberance to thelowest median point of the superior maxilla, just above the incisors (Tto M), passes almost directly through the basion. Hence, in cephal-ometry, by taking this diameter and the radii from each extremity tothe bregma, we have a triangle (31, ft, T) whose height (B, /5) is easilyascertained. The height averages cm. in men, in women,and the physiological variation is from to 1
Nervous and mental diseases . 3tNAUR/C(/LAR-D/AM. ff/Fig. Fig. 277. ment of the distance between the basion and vertex of the skull (Bto /?, or U). A line from the external occipital protuberance to thelowest median point of the superior maxilla, just above the incisors (Tto M), passes almost directly through the basion. Hence, in cephal-ometry, by taking this diameter and the radii from each extremity tothe bregma, we have a triangle (31, ft, T) whose height (B, /5) is easilyascertained. The height averages cm. in men, in women,and the physiological variation is from to 15. The only instruments necessary for obtaining the data just describedare a pair of calipers, the tape-line, and a strip of sheet-lead two feetlong by J or f of an inch wide. Benedikts calipers (manufacturedby Wolters in Vienna), which are here illustrated, are to be recom-mended for their exactness (Fig. 278), as are also those that I have hadmade for my own use (Fig. 279). Excessive prognathism is found among criminals, in microcephali,and in cases of hemi
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