( 388 ) 



hiris jiiitci'ior, llial (•(tiitiiiiied lor ;i Ion,!-' wliiK^ llioir loiiuihidiiial 

 course, begin lo assume au ()l>li<|ue dorsal direclioji in llie rcig'ion of 

 the oliva supcM-ior and al llie lirsl ai»j)eara)U'e ol" liUres heionging 

 to tlie corpus Irapezoides. 'I'liev cross the libres of llie coi-pus Irape- 

 zoides in doi'so-lalei-al direeliou, in (H>use(pieuce of which lliev pi-esenl 

 in the sections a pecuhar disiriluilion hv lavers (lig. i)). Until tlie 

 place of exit of the Irigeininus their siluation remains nearly unaltered, 

 the fibres lying only more (dosely togethei-, till they take a sudden 

 turn in dorsal direction, somewhat frontal IVom ihc trigeminus, thus 

 joining the course of the lateral ribbon (hupieus lateralis) and sta\ ing 

 for the greater ])art at its outside. Through the pednnculns ad cerebellum 

 the greater part of the fibres now reach the cerebellum, where they take 

 a retrograde direction, extending in the shape of a fan into the \ermis 

 inferior. Only a few fibres follow the course of the remaining portion 

 of the lateral laqueus, and reach the corpus (luadrigeminnm posticnm 

 of the same side. Some authors assert that fibres may be traced 

 likewise unto the cori)us (piadrigeminum anticum (Thomas, Walt-knükrc;, 

 BiANOHi, CoiJ.iKR and others), but van (iKhi'(;htkn, Edingkk and Mott 

 agree on this ])oint with Lor.WKNTHAL, who has been the first lo 

 give an accurate description of the fascicle of Gowkhs. 



As I remarked before, the image of the lesions of the spinal cord 

 presents differences only as regards the dorsal portion of the lateral 

 fasciculi to the cerebellum, the degeneration found in this portion 

 being far less intense than it was in the case, where the section 

 was made near the origin of the medulla oblongata. This result, 

 however, must be ascribed not only lo the absence of degenerated 

 bnlbo-cerebellar tibres, but partly also to the fact that a great number 

 of lil)res from the dorsal fascicle find a provisory termination at 

 the passage of the spliud cord into the myelencephalon, as is shown 

 bv the prepai-ations. Whilst therefore in the ventral portion we find 

 almost without exception only long libres. in the dorsal i)art of the 

 lateral fasciculi of the cerebellum long and short fibres are inter- 

 ndxed, and vei-y prol)ably the connection is composed for the greater 

 part of two neurones. 



In all mv ])reparations, some degeneration is observed likewise in 

 the fasciculus longitudinalis posterior. This receptacle of numerous 

 rd)res, ascending and descending ones, originating in very ditrerent 

 poi-tious of the ner\e-trunk, shows degenei'ation over the whole of 

 its length, and it seems as if from this fascicle all nuclei of motor 

 nerve-fibres are provided with allereut libres, the MAROHi-grannlae 

 being found even in the motor roots. In this paper I will not digress 

 longer on the possible significance of this MAKciii-granulation, though 



