DEGENERATIONS FROM LESIONS OF TEMPORAL CORTEX. 159 



tract (see d. 1, fig. 7), and from thence passed into the outer part 

 of the pes pedunculi. In the subthalamic region the degener- 

 ated fibres were found to occupy the posterior part, distributed 

 amongst certain of the bundles of fibres into which the s^'stem 

 is here subdivided (see cl. 1, fig 8), but leaving others wholly- 

 free. These latter, which no doubt for the most part represent 

 the projection system of the occipital lobe, were not always the 

 most posteriorly situated. Quite a common arrangement was 

 to find a small degenerated bundle hindmost of all ; then one or 

 more large bundles in which the fibres were normal ; and in 

 front of these the main set of degenerated fibres. The method 

 of distribution was, however, subject to variation, and leads one 

 to believe that the relative position of the various bundles at this 

 situation is not absolutely constant. 



The existence of a definite tract in the outer part of the pes 

 pedunculi, descending from the temporal lobe, has been abund- 

 antly confirmed by many observers in recent as well as former 

 years. Amongst later workers may be mentioned Dcjcrinc^ 

 Van Gchuchten^- Fcrrier and Turner,^ Pusateri,^ and Gcrvmr,^ 

 all of whom describe this tract. Van Brero ^ stands alone in 

 denying its existence. Nearly all of the authors mentioned 

 consider that the bundle in (question contains fibres from the 

 temporal lobe only. Gerwier, on the other hand, assigns to it 

 fibres from the occipital cortex as well. This view I can 

 substantiate, both from the fact that amongst the degenerated 

 fibres, numerous normal ones are found, and also from the 

 results of experiments which I made on the occipital cortex in 

 conjunction with Dr Cecil Shaw," and published some years ago. 



^ Dejerine, J. op. cit. 



- Van Geliuchten, " Contvib. a I'etude du faisc. pyram.," Journ. de Neurol, ct 

 (VHypuol., B. 1, pp. 336-345 ; also 355-364. 



^ Ferrier and Turner, W. A., op. cif. 



■• Pusateri, E., " Contrib. alio studio dell' orig. del fascio pedunc. di Tiirck e 

 del fascio long inf.," II Pisioii, s. 141-154. 



^ Gerwier (Hervver), A. W., " Ueber die Endigung. in d. Hirnrinde des lat. 

 Biindels an. d. Basis d. Pedunc. cereb.," Ueberscliau ilber Psych. Neurol, u. 

 expcrim. Psych., H. 3, s. 222. (Ref. m CoUr. f. Nervhkdc, 21. Jahrg,, N.F., 

 ix. 106, p. 687.) 



^ Van Brero, P. C. J., " La Termiu. cort du faise. lateral pedonculaire," Nouv. 

 Iconogr. de la Salpetricrr, Annee 9, No. 4, pp. 206-222. 



^ Shaw, C, and Thompson, W. H., " Desc. Degenerns. from Lesions of the Cor- 

 tex of the Occipital Lobe in Monkeys,'' Brit. Med. Jonrn., 1896, vol. ii. p. 630. 



VOL. XXXV. (N.S. VOL. XV.)— JAN. 1901. L 



