AMAarchives of neurology & psychiatry . ent of about cm. was implicated by acellular infiltration consisting of cells similar to those found in thetumor proper. RHEIX—FAISCEAU DE TURCK 611 A study of the serial sections of the brain internal to the tumorand the corresponding levels on the opposite side failed to reveal anyevidence of degeneration on either side. The faisceau de Tiirck, at thepoint where it appears in the retrolenticular region, was intact. Thefoot of the peduncle stained uniformly and showed an undegeneratedfaisceau de Tiirck in this region (Fig. 4). The duration of the tu
AMAarchives of neurology & psychiatry . ent of about cm. was implicated by acellular infiltration consisting of cells similar to those found in thetumor proper. RHEIX—FAISCEAU DE TURCK 611 A study of the serial sections of the brain internal to the tumorand the corresponding levels on the opposite side failed to reveal anyevidence of degeneration on either side. The faisceau de Tiirck, at thepoint where it appears in the retrolenticular region, was intact. Thefoot of the peduncle stained uniformly and showed an undegeneratedfaisceau de Tiirck in this region (Fig. 4). The duration of the tumor, which showed its first clinical mani-festations six months prior to death, justifies the assumption that thedegeneration should have had time to appear in the faisceau de Tiirck,where it appears in the retrolenticular region if not in the foot of thepeduncle, if its cortical origin had been destroyed. In 1912, I ^ read before the American Neurological Association apaper on a study of the faisceau de Tiirck; and I stated that the. Fig. 4.—Absence of degeneration of the faisceau de Tiirck. anatomic relations of the faisceau de Tiirck were still a matter of dis-pute. The origin of this tract, according to Dejerine, was the middleportion of the temporal lobe, more especially the cortex of the secondand third temporal lobes, Kann and Brodman believed could beconfirmed from their .studies. The studies of Kattwinkle and Xeu-mayer placed its origin in the third, second and first temporal con-volutions. Flechsig and \an Gehuchten did not agree with this Bechterew, Flechsig and Meynert and others paced its origin inboth the temporal and occipital lobes; Brero. in the parietal lobe; whilevon Monakow and others asserted that its origin was in the parietal andtemporal lobes, von Monakow believing that some of the fibers camefrom the occipital lobe. Marie and Guillain, from a study of nineteen 1. Rhein, John H. \V.: J. Xerv. & Alent. Dis. 38: Xo. 9 (Sept.) 1911. 612
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