. A treatise on nervous and mental diseases, for students and practitioners of medicine. •, third occipital convolutions, po. Parieto-occipital fissure, o^. Sulcus occipitalistransversus. oK Sulcus occipitalis longitudinalis inferior. T^, first; t^, second; T-\tliird temporo-sphenoidal convolutions. t\ first; <^,second temporo-sphenoidal 74 INTRODUCTORY. whilst Dnret maintains that each area is isolated. From the pia matertwo sets of arteries pass into the cerebral snbstance: long or mednl-lary vessels, and short or cortical vessels. The long or mednllary Fig. Vascular areas


. A treatise on nervous and mental diseases, for students and practitioners of medicine. •, third occipital convolutions, po. Parieto-occipital fissure, o^. Sulcus occipitalistransversus. oK Sulcus occipitalis longitudinalis inferior. T^, first; t^, second; T-\tliird temporo-sphenoidal convolutions. t\ first; <^,second temporo-sphenoidal 74 INTRODUCTORY. whilst Dnret maintains that each area is isolated. From the pia matertwo sets of arteries pass into the cerebral snbstance: long or mednl-lary vessels, and short or cortical vessels. The long or mednllary Fig. Vascular areas of the upper surface of the cerebrum. (After Duret.)F. Frontal lobe. P. Parietal lobe. 0. Occipital lobe. s. End of the horizontalramus of the fissure of Sylvius, c. Fissure of Rolando. A. Ascending frontal con-volution. B. Ascending parietal convolution. F^, F^, F^. Superior, middle, andinferior frontal convolutions, ^i,/^. Superior and inferior frontal sulci, f^. Sulcuspr^centralis. Pi. Superior temporal lobule. P^. Gyrus supra-marginalis. P^. Gyrusangularis. tp. Parietal fissure, cot. Calloso-marginal fissure. ;90,^o. Parieto occipitalfissures. <i. Superior temporal fissure. 0. First occipital convolution, o. Transverseoccipital sulcus. Arteries: The line ( ) marks the limits of the distribution of the anterior cerebral; the line ( ) on the left side of the figure limits the distri-bution of the Sylvian artery. I External and inferior frontal artery. II. Anteriorparietal artery. III. Posterior parietal artery. IV. Parieto-sphenoidal artery. Theline ( ) on the righ


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