He now enters into a detailed analysis of the course of the sensory nerves as far as they are able to be demonstrated (›in ipsius oculi luce›), and he thus follows the optic nerves to the optic thalami, and thence their radiation towards the cerebral cortex, the olfactory nerves to the corpora striata or the medulla of the centrum ovale and from there out towards its cortical surroundings, the auditory nerves to the medulla oblongata and thence up toward the cortex of the cerebrum, (›versus supremum corticem›), and in the same manner he follows the nerves of taste and touch. (See Œc. R. A. II., No. 192; and III., No. 66). He cannot now follow further the particular fibres through the medulla all the way to the cortex, of whose importance for consciousness and sensibility he became convinced through the clinical experiences, but here he must _suppose_ a connection, and he says: ›these effects (conscious perceptions) could never be produced ... unless in every quarter there were _a mutual connection and perpetual communication of the cortical substance with the medullary_, as regards the fibrils ...›, (as well as a special arrangement of the cortical elements and special qualifications in them, of which more will be said later).[66] From all this it is clear, that it was probably through _a combination of clinical and anatomical experiences_ that SWEDENBORG secured the premises for his conclusions that the centre of the soul’s sensory activity is in the cortex of the cerebrum. ON THE CENTRES OF THE MOTOR FUNCTIONS. SWEDENBORG also placed the centres of the soul’s motor activity in the cerebral cortex (See Œc. R. A., No. 127, etc.). I have not been able to find anything of this kind even hinted at in the antecedent literature. We are reminded of how preceding authors, who made an attempt at some kind of localization of the origin of motion, in most cases placed this in the medulla of the brain, as for example the BARTHOLINS;[67] and also BOERHAAVE.[68] And as we have just heard, HALLER still held the same view.[69] Nevertheless SWEDENBORG expresses his conception without the slightest hesitation, and this he did because he regarded it as resting on a sure foundation. His strongest grounds and proofs were here also derived from the _clinical and pathological observations_ in certain cerebral diseases which had caused changes in the cortex, and in patients, who had been injured in the cerebral cortex. It was these clinical cases at which I hinted just now. And now some of these may be brought forward, for the most part as SWEDENBORG himself has related them—with some few abbreviations: