CRILE— PHYLOGENETIC ASSOCIATION. 



77 



self-preservation is dependent upon an uncertain adequacy of their 

 power of muscular exertion either in defense or in flight. 



What are the principal phenomena of fear? They are palpita- 

 tion of the heart, acceleration of the rate and alteration of the 

 rhythm of the respiration, cold sweat, rise in body temperature, 

 tremor, pallor, erection of the hair, suspension of the principal func- 

 tions of digestion, muscular relaxation and staring of the eyes. 

 The function of the brain is wholly suspended except that which 



Fig. I. The expression in this picture, copied from " Outing." shows the 

 participation of the facial muscles in physical action — perhaps it may indicate 

 the orio'in of the activity of the facial muscles in ancient fighting with teeth. 



relates to the self-protective response to the object feared. Neither 

 the brain nor any other organ of the body can respond to any other 

 lesser stimulus during the dominance of fear. 



From the foregoing it would appear that under the influence of 

 fear, most, perhaps all of the organs of the body, are divided sharply 

 into two classes : first, those that are stimulated, and second, those 

 that are inhibited. Those that are stimulated are the entire muscu- 

 lar system, vasomotor and locomotor systems, the senses of per- 



