Behavior: Equilibration and Dizziness 51 



peculiarities of behavior of the dancer which demand 

 an explanation in terms of structure. These are: (i) the 

 dance movements whirling, circling, figure-eights, zigzags; 

 (2) restlessness and the quick, jerky movements of the 

 head; (3) lack of responsiveness to sounds; (4) more or less 

 pronounced deficiency in orientational and equilibrational 

 power; (5) lack of visual dizziness; (6) lack of rotational 

 dizziness. 



Naturally enough, biologists from the first appearance of 

 the dancing mouse in Europe have been deeply interested 

 in what we usually speak of as the causes of these peculiarities 

 of behavior. As a result, the structure of those portions of 

 the body which are supposed to have to do with the control 

 of movement, with the phenomena of dizziness, and with 

 the ability to respond to sounds, have been studied thor- 

 oughly. In the next chapter we shall examine such facts of 

 structure as have been discovered and attempt to correlate 

 them with the facts of behavior. 



