. A treatise on nervous and mental diseases, for students and practitioners of medicine. of Vieussens as it archesover the fourth ventricle and the aqueduct of Sylvius, along the floorof the aqueduct of Sylvius, and along the floor of the third ventricle,almost down to where it commences to narrow into the infundibulum,is gray matter containing nerve cells, and in this gray matter thecranial nerves have their origin from the twelfth to the third inclusive,the twelfth most posteriorly and the third most anteriorly. In otherwords, it is evident that the spinal cord is thus prolonged into the bra
. A treatise on nervous and mental diseases, for students and practitioners of medicine. of Vieussens as it archesover the fourth ventricle and the aqueduct of Sylvius, along the floorof the aqueduct of Sylvius, and along the floor of the third ventricle,almost down to where it commences to narrow into the infundibulum,is gray matter containing nerve cells, and in this gray matter thecranial nerves have their origin from the twelfth to the third inclusive,the twelfth most posteriorly and the third most anteriorly. In otherwords, it is evident that the spinal cord is thus prolonged into the brain, ANATOMY. 47 SO that the medulla oblongata, as it is called, is nothing more thanthe upper enlarged end of the spinal cord, so altered in shape as toconform to the exigencies of cerebral architecture. Let us supposethat a number of microscopical sections are made through the regionsof the pons, aqueduct of Sylvius, fourth ventricle, and upper part ofthe spinal cord, as they are shown in Fig. 29, and we will get anidea of the topography of this region by the study of them. Fig.
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidtreatiseonnervou00gray
