Operative surgery, for students and practitioners . orfrontal sulci. The line E-T is called the Sylvian line. It crossesthe precentral line at the point A, which corresponds to the pterionand to the Sylvian jDoint, and the anterior branch of the middle me-ningeal artery. A-C corresponds to the posterior, horizontal limb ofthe Sylvian fissure, which terminates behind in the triangle point where the Sylvian line E-T strikes the sagittal line, T,marks the location of the parieto-occipital fissure. A line drawn fromT to R and from R to 0 marks a triangle that corresponds to theexternal s
Operative surgery, for students and practitioners . orfrontal sulci. The line E-T is called the Sylvian line. It crossesthe precentral line at the point A, which corresponds to the pterionand to the Sylvian jDoint, and the anterior branch of the middle me-ningeal artery. A-C corresponds to the posterior, horizontal limb ofthe Sylvian fissure, which terminates behind in the triangle point where the Sylvian line E-T strikes the sagittal line, T,marks the location of the parieto-occipital fissure. A line drawn fromT to R and from R to 0 marks a triangle that corresponds to theexternal surface of the occipital lobe. The line drawn from i^ to 0 CRANIOCEREBRAL TOPOGRAPHY. 67 corresponds to the attachment of the tentorium and to the uppermargin of the h^teral sinus. The *space included between the pre-central line A-M and the postcentral line C-D corresponds to theEolandic area, and includes the gyrus centralis anterior and the gvruscentralis posterior, which are separated from each other by the fissureof Eolando—sulcus Fig. 42.—Kronleins Schema, to Locate the Fissure of Rolando, etc. Ai, A-,the horizontal lines; B^, B-, B^, the vertical lines: C^, C, the oblique lines,fissure of Rolando and fissure of Sylvius; K^, A-, the course of the anteriorand posterior branches of the middle meningeal artery. Site of exposure forligation. The quadrilateral space A=, L, M, X. corresponds to portion of boneto be removed to gain access to abscess in the temporo-sphenoidal lobe. The fissure of Eolando may be mapped out upon the scalp bydrawing a line from a point Y^ inch behind the mid-point 21, uponthe sagittal line, downward and forward at an angle of 6Ti/o° withthe sagittal line. IvROXLEixs Schema consists of two horizontal parallel lines,three vertical parallel lines, and two oblique lines. A. Horizontal Lines.— 1. The German base line passing from 68 HEAD AND FACE. the inferior border of the orbital cavity through the upper borderof the external auditory
Size: 1549px × 1613px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormcgrathj, bookcentury1900, bookdecade1910, bookyear1913
