xii Contents 



CHAPTER IV 



PAGE 



BEHAVIOR: EQUILIBRATION AND DIZZINESS .... 41 



Muscular coordination Statements of Cyon and Zoth 

 concerning behavior Control of movements, orientation, 

 equilibration, movement on inclined surfaces, climbing 

 The tracks of the dancer Absence of visual dizziness 

 Comparison of the behavior of the dancer with that of the 

 common mouse when they are rotated in a cyclostat Be- 

 havior of blinded dancers (Cyon, Alexander and Kreidl, 

 Kishi) Cyon's two types of dancer Phenomena of be- 

 havior for which structural bases are sought : dance move- 

 ments ; lack of response to sounds ; deficiency inequilibrational 

 ability ; lack of visual and rotational dizziness. 



CHAPTER V 

 STRUCTURAL PECULIARITIES AND BEHAVIOR .... 52 



The functions of the ear Structure of the ear of the 

 dancer as described by Rawitz, by Panse, by Baginsky, by 

 Alexander and Kreidl, and by Kishi Cyon's theory of the 

 relation of the semicircular canals to space perception Con- 

 dition of the auditory organs Condition of the equilibra- 

 tional organs Condition of the sound-transmitting organs 

 The bearing of the results of anatomical investigations 

 upon the facts of behavior. 



CHAPTER VI 



THE SENSE OF HEARING 73 



Experiments on hearing in the dancer made by Rawitz, 

 by Panse, by Cyon, by Alexander and Kreidl, by Zoth, and 

 by Kishi Hearing and the voice Methods of testing sen- 

 sitiveness to sounds Results of tests with adults Im- 

 portance of indirect method of experimentation Results of 

 tests with young The period of auditory sensitiveness 

 Individual differences. 



CHAPTER VII 

 THE SENSE OF SIGHT: BRIGHTNESS VISION .... 91 



What is known concerning sight in the dancer Bright- 

 ness vision and color vision Methods of testing brightness 



