286 EDGARDO BALDI 



reveals itself with special clearness in the antimere opposite to 

 that of the lesion. 



2. This injury provokes very probably a general increase of 

 movement which is manifest particularly in the appendages of 

 the injured side. 



3. The final effect is to produce a disturbance of equilibrium 

 in the normal functioning of the musculature, in which the 

 activity of the flexor muscles of the uninjured side predominates, 

 an activity rendered manifest by the greater permanent flexion 

 of the uninjured appendages and by the bending of the body 

 toward the uninjured side. 



4. These abnormal physiological conditions in the muscula- 

 ture so influence the normal course of the locomotor movements 

 as to produce movement in a circle. 



5. The movement in a circle is due for the most part (but 

 not exclusively, since it is a movement in which the whole or- 

 ganism participates actively) to the traction predominatingly 

 exercised by the first two appendages of the uninjured side, this 

 traction being variously directed with respect to the sagittal 

 plane. It is helped and facilitated by the propulsive arcuate 

 movements, characteristic of all the appendages of the injured 

 side particularly of the first two. 



6. That the movements of flexion are the principal cause of 

 circus movements is proved: 



a) By the impossibility of eliciting such movements by the 

 artificial exaggeration of the propulsive activity of one side. 



b) By the re-establishment of straight or oscillatory locomo- 

 tion, when, by the amputation of the segments of the leg, the 

 execution of the movements of traction is rendered impossible. 



c) By the persistence of circus movements where only the 

 propulsive arcuate movements are prevented in the legs of the 

 injured side. 



■ 7. Thus circus movement does indeed result from an altera- 

 tion of the general conditions of symmetry of the organism, as 

 we have assumed from the beginning, but from such an altera- 

 tion as affects the entire organism, assuming various aspects 

 in different regions. 



