Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . nt have been given indetail in a work of one ofhis auditors, Hugueniuj^ ^ I l||||vS? Ill I / Professor at Zurich.^/ .^.^ \ yUrCv vWni / They consist of dissec-tions and also in compari-sons of thin slices, hard-ened, and examined bytransmitted light. The brain being placedupon its base, the lateralventricles are opened insuch manner as to laybare the superior face ofthe central masses—thosewhich are contiguous tothe various parts of theisthmus; after that, byminute dissecti
Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . nt have been given indetail in a work of one ofhis auditors, Hugueniuj^ ^ I l||||vS? Ill I / Professor at Zurich.^/ .^.^ \ yUrCv vWni / They consist of dissec-tions and also in compari-sons of thin slices, hard-ened, and examined bytransmitted light. The brain being placedupon its base, the lateralventricles are opened insuch manner as to laybare the superior face ofthe central masses—thosewhich are contiguous tothe various parts of theisthmus; after that, byminute dissection, aresuccessively removed:1st, tegmentum, of the peduncle ; 2d, the tubercula quadrigemina ; 3d,the entire thalami optici. This being done, the inferior parts of the peduncle {^pes,crusta) are brought to view, and higher up (in the regionof the internal capsule), the fasciculi of peduncular fibres run-ning to the caudated ganglion. The fibres belonging to theinternal capsule, which go to the lenticular ganglion, occupy aplane situated beneath and external to the preceding BsJoulusTJ dired; peduncular fibresgoing to cortical suistance of occipl loBe. Fig. 26.—Scheme of direct and indirect pe-duncular fibres.—(Huffuenin.) Allgem. Path, der Krankh., etc., p. 119, Fig. 82, Zurich, 1873. CENTRAL ARTERIES. 85 Attentively observing the internal and posterior parts ofthe diverging fibres thus exposed, there is to be discovered afasciculus, detached as it were from the main body, and which,without entering the substance of the gray ganglia, turnsbackward as soon as it reaches the inferior border of the len-ticular ganglion (Fig. 26). That, you see, is a direct fasciculus, since the fibres of whichit is composed enter the diverging fibres without stopping inthe gray substance of the central masses ; it is, moreover, asthe description shows, a separate fasciculus. What is the destination of these nerve-fibres ? With manit is nearly impossible to say; but
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