CONTENTS. xi 



PAGE 



of Sensations itself Insensible. Crossed Control of the Body. Lo- 

 cation of Brain Functions. Left Hemisphere better Developed. 

 Location of Sensation Centers. Brain Work and Brain Rest. 

 Sleeplessness. Fatigue. Control of Mind. Habit of Resting the 

 Brain. Nervous Tissues least Affected by Starvation. Blood Supply 

 of the Brain. Fainting. Apoplexy. Meningitis. The Water 

 Cushion of the Brain. Relative Activity of Gray and White Matter. 



CHAPTER XVI. 



EFFECTS OF ALCOHOL ON THE NERVOUS SYSTEM 250 



The Chief Effect of Alcohol is on the Nervous System. Inebriety re-" 

 garded as a Disease. Moral Deterioration produced by Alcohol. 

 Narcotics. Opium. Cocaine. Chloral Hydrate. Chloroform. 

 Tobacco. Cigarette Smoking. 



CHAPTER XVII. 



GENERAL CONSIDERATIONS CONCERNING THE NERVOUS SYSTEM . . . 261 

 Nerve Stimuli. Kinds of Nerve Stimuli. Essential Similarity of All 

 Nerve Fibers. Relation of Stimulus and Sensation. Reaction 

 Time. Reflex Action. Connection of Brain 'Centers. Nature of 

 Sensation. Subjective Sensations. The Relative Nature of Sensa- 

 tion. Induction Currents used in Physiological Experiments. 

 Dreams. Lingering Effect of Sensations. Habits are Acquired 

 Reflex Actions. Usefulness of Resting. Nervous System vs. Tele- 

 graph System. Efferent Currents. Afferent Currents. 



CHAPTER XVIII. 



THE GENERAL SENSES 271 



The Body a Collection of Organs. Influence from the External World. 

 Classification of the Senses. General Sensations and Special Senses. 

 The Muscular Sense. Importance of Muscular Sense. Dependence 

 of Sight on Muscular Sense and Touch. Pain. Pain a General 

 Sense. Extent of Pain. Use of Pain. Hunger and Thirst. 



CHAPTER XIX. 



THE SPECIAL SENSES TOUCH AND TEMPERATURE SENSE .... 278 

 What we learn by Touching Objects. Cutaneous Sensations. Nerve 

 Endings in the Skin. Touch Corpuscles. Touch the most General 

 of the Senses. Pressure Sense. Local Sign. Test by Compass 

 Points. Reference of Sensation to the Region of the Nerve End- 

 ings. Temperature Sense. 



