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the centripelal iniptilsos ulong (lie tracliis spiiio-cerebellares were 

 fallen away, as happens in cases, affecting- the posterior funiculi, e.g. 

 in (abes dorsalis. 



For disturbances of the vestibular organ 1 had best limit myself to 

 those cases, in wiiich the equilibrium organ had lost its functions, 

 inter alia after scarlatina, cerebro-spinal meningitis etc. 



In working out these investigations I I ried in the first place to 

 devise a scheme, which could serve as well in lesions of the 

 posterior funiculi, as in those of the vestibular organ and in altera- 

 tions of the cerebellum. 



I thought I had found one in letting the patients perform walking- 

 tests, which were registered on |)aper. For this purpose a line was 

 drawn in the middle of large pieces of |)aper, on which the patients 

 walked after blacking their footsoles. 



When in this paper I leave the results, which I found in cere- 

 bellar alterations out of account, and when I limit myself to those 

 which are correlated to lesions of the posterior funiculi and the 

 vestibular organ, 1 tind what follows: 



1. If a patient, who suffers from tabes in a rather far advanced 

 state, walks on the j)aper, then the reproduction of figure I ') 

 appears : 



The patient tries to fulfil the task of walking on the line (foot print 

 J — 2 and 3), but sways to and fro, as in the Romberg syndrome 

 and he is obliged to put down the right foot lateral wards, (4). Still 

 worse the swaying becomes in the follownng right footstep (6) 

 when he replaces the foot three times to keep his eciuilibrium. 



The deviation in the line of equilibrium is most distinct with the 

 footsteps 8 to 11, which he had to put down close to each other 

 and diii'ing which it was inqjossible to him to remain on the line. 

 He therefore leaves off trying it and walks on rather well along a 

 broad gait- path. 



2. When that which is ordered snb I, is repeated, but with eyes 

 shut, then the deviations of the gaitpath are still more districtly visible. 



3. If one lets the patient repeat the same walking exercises as 

 sub 1 and 2, but allows him at the same time to touch our hands '), 

 then one sees a gaitpath nearly as normal (fig. 2). 



1) The cross on llie photo indicaleü tlie moment when I thickened the contours 

 of tlie foot prints with ink, because otherwise the footsteps do not come out well 

 enough on the photograph. 



'^) WliiJe walking the patient, wlio is standing on the middle of the paper, 

 stretches his arms to the left and to the right and lays his hands on tlie dorsal 

 plane of those, which are tended to liim from the side. The persons, who help to 



