A text-book of clinical anatomy : for students and practitioners . OCCIPITALLOBE Fig. 15.—Cerebral localization. SF, Fissure of Sylvius. RF, Fissure of Rolando. 53. Fig. 16.—Coronal section of skull made through middle of petrous portion of tem-poral bone as seen looking backward into posterior fossa, i, Internal jugular vein atits beginning, the white line indicating a straw which was passed from the termination ofthe sigmoid sinus through the jugular bulb into the jugular vein. 2, External auditorymeatus, at the inner end of which one sees the membrana tympani forming an angle of 45degrees w
A text-book of clinical anatomy : for students and practitioners . OCCIPITALLOBE Fig. 15.—Cerebral localization. SF, Fissure of Sylvius. RF, Fissure of Rolando. 53. Fig. 16.—Coronal section of skull made through middle of petrous portion of tem-poral bone as seen looking backward into posterior fossa, i, Internal jugular vein atits beginning, the white line indicating a straw which was passed from the termination ofthe sigmoid sinus through the jugular bulb into the jugular vein. 2, External auditorymeatus, at the inner end of which one sees the membrana tympani forming an angle of 45degrees with the horizon. Attached to the middle of the membrana tympani can be seenthe malleus and incus (to malleus). Above these bones is seen the epitympanic space (4).The section has been made rather obliquely, so that on the right side of the skull it passesthrough the petrous portion of the temporal bone a little further back, showing the mas-toid antrum (3), surrounded by the mastoid cells. 5, Beginning of spinal canal at pos-terior fossa of skull. 6, Torcular Herophilii, showing the point of meeting of the longitu-dinal sinuses and the lateral sinuses (8).
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