Principles of physiological psychology / translated from the Fifth edition by E.B. Tichener.

  • Wilhelm Wundt
Date:
1904
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Licence: In copyright

Credit: Principles of physiological psychology / translated from the Fifth edition by E.B. Tichener. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    2S7-S] distinction, so tar as it is practicable at all, must also be left over for the detailed psychological analysis of the processes involved.1 (c)—Results from Comparative Anatomy and Anthropology The general conclusion to be drawn from the abrogation phenomena, that the phvsiological function of the cerebral hemispheres stands in intimate relation to the intellectual activities and (o the complex affective and volitional processes, is, upon the whole, confirmed by the results of comparative anatomy, evolutionary biology and anthropology. Compara- tive anatomy shows that the mass of the cerebral lobes, and more especially Fig. 100. Normal small brain, with fair Fig. ioi. Brain of the mathematician, their superficial ridging by fissures and gyres, increase with increasing in- telligence of the animal. This law is, however, limited by the condition that both factors, mass and superficial folding, depend primarily upon the Size of the body. In the largest animals the hemispheres are absolutely, in the smallest, relatively larger, i.e., larger as compared with the weight of Ebe whole body ; and the ridging, as is natural from the relative decrease of surface with increasing volume of an organ, increases with the size of the brain : in all very large animals, therefore, the brain shows an abun- dance of fissures.2 The physical organisation is another factor of great 1 See below. Parts IV., V. 1 Leuret and Gkatioi.et, Anatomie comparte du systimc ncrveux, ii., 290. Owen, A natomy of Vertebrates, iii. fissural development. C. Fr. Gauss.