The practice of surgery . Fig. 416.âForty-five per cent, ofmedian naso-inionic line = prero-landic point; 55 per cent. = Rolandicpoint; 70 per cent. = Sylvian line; 80per cent. = lambda; 95 per cent, giveslower edge , of occipital lobe. Linefrom A, external angular process, to70 per cent, gives Sylvian fissure. Sa= Sylvian point = junction of secondand third tenths of this line, while R= inferior Rolandic point = junctionof its third and fourth tenths (Cushingin Keens Surgery).. Fio-. 418.âGB = German base-line from inferior edge of orbit throughupper edge of meatus. XJB = upperhorizontal, par
The practice of surgery . Fig. 416.âForty-five per cent, ofmedian naso-inionic line = prero-landic point; 55 per cent. = Rolandicpoint; 70 per cent. = Sylvian line; 80per cent. = lambda; 95 per cent, giveslower edge , of occipital lobe. Linefrom A, external angular process, to70 per cent, gives Sylvian fissure. Sa= Sylvian point = junction of secondand third tenths of this line, while R= inferior Rolandic point = junctionof its third and fourth tenths (Cushingin Keens Surgery).. Fio-. 418.âGB = German base-line from inferior edge of orbit throughupper edge of meatus. XJB = upperhorizontal, parallel to GB through up-per border of orbit. M, C and Z = per-pendicular at posterior border of mas-toid, at condyle and midzygcma. TheRolandic line unites the points of cross-ing of the posterior perpendicular andsagittal lines, R, and the upper hori-zontal and anterior perpendicular, Svlvian line bisects the angle RSH. Inferior Rolandic point, R (Cush-ing in Keens Svirgery). (340 THE HEAD AND SPIXE genu there is a small triangle only of motor cortex which can be stimulated, this ti-ianf;le shows movements in the hip, the knee,and toes. Opposite to this upper genu lie centers for movements of thethorax and abdomen. Between it and the middle genu lie centers forthe upper extremity, the shoulder being represented by a center higherthan that of the fingeis and thimib. Opposite the middle genu aie thecenters for the neck, and below it those for the faceâ
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1910
