The practice of surgery . Fig. 417.—NO = Kochers equator-ial line, nasion to inion. XL = PoiriersSylvian line from nasion to = Kochers anterior meridiandrawn 60° from meridian line at midsag-ittal point; lies over precentral convolu-tion and crosses XL at Sylvian point,Sfs = superior frontal sulcus at one-third of MA; Sfi = inferior frontal sul-cus at two-thirds of MA. MP =Kochers posterior meridian, also 60°from midline. Lines crossing at Sts =superior temporal sulcus (Gushing inKeens Surgery).. Fig. 416.—Forty-five per cent, ofmedian naso-inionic line = prero-landic point; 55 per c
The practice of surgery . Fig. 417.—NO = Kochers equator-ial line, nasion to inion. XL = PoiriersSylvian line from nasion to = Kochers anterior meridiandrawn 60° from meridian line at midsag-ittal point; lies over precentral convolu-tion and crosses XL at Sylvian point,Sfs = superior frontal sulcus at one-third of MA; Sfi = inferior frontal sul-cus at two-thirds of MA. MP =Kochers posterior meridian, also 60°from midline. Lines crossing at Sts =superior temporal sulcus (Gushing inKeens Surgery).. Fig. 416.—Forty-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).
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1910
