5 6 OUTLINES OF ANATOMY. 



Floor of the Fourth Ventricle: 



Anterior moiety of the floor. 



Eminentia teres. Fasiculus teres. 

 Fovea superior. Conductor sonorus. 

 Locus caeruleus. Substantia ferruginea. 

 Pons varolii. 



Dorsal surface. 



Ventral surface. 



Superior border. 



Inferior border. Oblique fasciculus. 



Ventral region. 



Transverse fibres: 



(a) Commissural. 



(b) Decussating fibres. 



(c) Fibres. 

 Longitudinal fibres. 



Upper or tegmental region. 

 The Metencephalon, 760-766. (743-749) 

 Medulla oblongata, or bulb. 

 Anterior surface. 



Posterior surface. Ventricular part. 

 Fissures : Anterior fissure. 



Foramen cajcum posterius, or foramen ctecum of Vicq d' Azyr. 

 Sulcus lateralis ventralis. Postolivary sulcus. 

 Posterior surface. 



Posterior fissure. 

 Sulcus paramedianus dorsalis. 

 Sulcus lateralis dorsalis. 

 Anterior area. 



Pyramidal bodies. 

 Funiculus anterior. 

 Lateral area. Lateral column. 

 Gray tubercle of Rolando. 

 Olivary body. External arciform fibres. 

 Posterior area of the medulla. 

 Funiculus gracilis. Clava. 

 Funiculus cuneatus. Cuneate tubercle. 

 Restiform body. 

 Dissection. 

 Internal structure of the medulla. 



Arrangement of the gray matter. 

 Olivary nucleus. 



Nucleus of the clava and the nucleus cuneatus. 

 Cranio-cerebral Topography, 766 to 771. (749 to 754) 

 Guide points: 



Glabella. Naso-frontal groove. Orbital arch. External angular process. 

 Zygoma. 



External auditory meatus. Mastoid process. Superior nuchal line. 

 External occipital protuberance, or inion. 

 Parietal eminence. Sutures. Lambda. 



Relation of the margin of the hemisphere to the cranial wall. 

 Orbital margin of the hemisphere. Sylvian point. 

 Position of the principal fissures : 

 Fissure of Rolando. 

 Naso-lambdoidal line. 

 Fissure of Sylvius. 

 External parieto-occipital fissure. 

 Angular gyrus. 

 Supramarginal convolution. 



