. The brain as an organ of mind. s at University College Hospital—with the view ofascertaining the relative frequency of these different results are embodied in the following Tables:— Side. Table I. Sex. Total. M. • F. Eight . 15 13 28 Left. . 1 1 2 Both Sides 3 1 4 Absent. 1 0 1 20 15 35 Table II. Degree. 3 . 2 . 1 . 0 . Sex. 8 101 20 lb In Table II. under Degree, the figure 3 signifies that thoj-roove was very well marked ; 2, that it was moderately wellmarked ; and 1, that it was only * slightly marked. 402 THE EXTERNAL CONEIGURATION on the right side than on the left is
. The brain as an organ of mind. s at University College Hospital—with the view ofascertaining the relative frequency of these different results are embodied in the following Tables:— Side. Table I. Sex. Total. M. • F. Eight . 15 13 28 Left. . 1 1 2 Both Sides 3 1 4 Absent. 1 0 1 20 15 35 Table II. Degree. 3 . 2 . 1 . 0 . Sex. 8 101 20 lb In Table II. under Degree, the figure 3 signifies that thoj-roove was very well marked ; 2, that it was moderately wellmarked ; and 1, that it was only * slightly marked. 402 THE EXTERNAL CONEIGURATION on the right side than on the left is by no means might perhaps be occasioned by the slightly increasedlength of the left Hemisphere, pressing backwards againstthe left side of the torcular, and so diverting a largercurrent of the blood flowing along the longitudinal sinustowards the right. It has been long known, indeed, thatthe groove in the occipital bone for the right lateral sinusis often distinctly broader than that for the left sinus,^—. Fig. 147.—View of Occipital Lobes and of Cerebellum from behind, showing the* Occipital Groove at the tip of the righr. Hemisphere. (From a drawing byV. Ilorslcy.) 1, The Groove: 2, 2, External Perpendicular Fissure. c, c, TheCerebellum. » thus conclusively showing that in all such cases, at least,the larger blood current is accustomed to pass away fromthe cranium along this side. (4.) The left Hemisphere was said by Dr. Boyd to begenerally heavier than the right by nearly half an , however, has been questioned by some investigators, * See fig. 23 of Grays Anatomy (3rd. Edn.), where thiscondition is well represented. CnAK XXI. OF THE HUMAN BRAIN. 403 and actually denied by others to be a usual condition. Some of the latter even affirm that though a difference often exists, the superiority in weight is most commonly in favour of the right rather than the left Hemisphere. This point cannot, perhaps, be definitely decided for the present. It is obv
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