110 



A STUDY OF SOME 



The Gait in Locomotor Ataxia. 



This gait was studied in Plates 546, 549, 550, 554, an.l 560. 

 All of the cases photographed were typical of locomotor ataxia. 

 The patient upon whom the trajectories were studied is the one of 

 Plate 560. His history is briefly as follows : 



H. E., aged thirty-four, a clerk by occupation, first noticed that 

 his general health was failing in the fall of 1883. He was at 

 first treated for general neurasthenia, but soon developed sciatic 

 pains and gastric crises. These last were very severe. He then 

 disappeared from observation for two years. When he again re- 

 turned he was markedly ataxic, both in the arms and legs. He 

 had parasthesia of the soles of the feet, contracted pupils, loss of 

 the patellar reflex, retardation of sensation, etc. 



In Fig. 6 is represented the right foot from the time of 

 leaving to again striking the ground. It needs but a superficial 

 glance to show that it differs markedly from the normal foot in 



Fig. 6. 



■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ ■■ ■■JM 

 ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■1! 

 ■■■■■■■■■■■■■■■■■■■■■■■■■■«■■■■■■■■■■■■■■ 

 ■■■■■■■■■■■■■■■■■■■■■■■^■■■^■^■■■■■■iiHBag 



■WHSaSSBSSflBaBnBaillBRflBliKBBinBBBBUllBBaB 



MfiiiriBEaBBSiaBaBwaBiaBflBeiiaBBrHBnBBtiBiiBBH 

 ■Sm/iBaaBnaaRaBBBBaaBB^BBiBBniBUBflriBiiBBBB 



Locomotor ataxia, right foot. 



its course. Compare, for instance, Figs. 4 and 5. It difi'ers more 

 widely still from the foot seen in Fig. 9, that of lateral sclerosis. 



The direction and extent of the lateral sway was determined 

 by means of a transparent scale corrected for perspective for each 

 position of the foot. (See Fig. 7.) The external malleolus is 

 selected as a relatively fixed point. The curve evolved is repre- 

 sented in line a, Fig. 8, whilst the rise and fall and onward 

 movement are shown in line b. 



The striking difference between line a and the corresponding 

 curve of the normal gait consists in its irregular and extensive 

 outward sway, while in the line 6 the difference consists in the 

 increased amplitude of the curve and in the irregularity of the 



