124 MAN AN ADAPTIVE MECHANISM 



a sudden and uncontrollable tendency to headlong 

 flight ; and so strong is this, that the boldest soldiers 

 may be seized with a sudden panic. As fear rises 

 to an extreme pitch, the dreadful scream of terror is 



From Darwin's " Expression of the Emotions in Men and Animals." 



FIG. 7. HORROR AND AGONY. 



heard. Great beads of sweat stand on the skin. All 

 the muscles of the body are relaxed. Utter prostra- 

 tion soon follows, and the mental powers fail. The 

 intestines are affected. The sphincter muscles cease 



