TABLE OF CONTENTS. 9 



PAGE 



CHAPTER XI. THE FUNCTIONS OF THE CEREBELLUM, THE PONS, AND 



THE MEDULLA 233 



Anatomical Structure and Relations of the Cerebellum, 233. General State- 

 ment of Theories Regarding the Cerebellum, 237. Experiments upon Ablation 

 of the Cerebellum, 239. Interpretation of the Experimental and Clinical Re- 

 sults, 240. Conclusions as to the General Functions of the Cerebellum, 241. 

 The Psychical Functions of the Cerebellum, 243. Localization of Function in 

 the Cerebellum, 243. The Functions of the Medulla Oblongata, 245. The 

 Nuclei of Origin and the Functions of the Cranial Nerves, 246. 



CHAPTER XII. THE SYMPATHETIC OR AUTONOMIC NERVOUS SYSTEM . . 251 



General Statements, 251. Autonomic Nervous System, 252. The Use of the 

 Nicotin Method, 253. General Course of the Autonomic Fibers Arising from 

 the Cord, 254. General Course of the Fibers Arising from the Brain, 255. 

 General Course of the Fibers Arising from the Sacral Cord, 256. Normal Mode 

 of Stimulation of Autonomic Nerve Fibers, 257. 



CHAPTER XIII. THE PHYSIOLOGY OF SLEEP 258 



General Statements, 258. Physiological Relations during Sleep, 258. The 

 Intensity of Sleep, 259. Changes in the Circulation during Sleep, 261. Effect 

 of Sensory Stimulation, 264. Theories of Sleep, 265. Hypnotic Sleep, 269 



SECTION III. 

 THE SPECIAL SENSES. 



CHAPTER XIV. CLASSIFICATION OF THE SENSES AND GENERAL STATE- 

 MENTS 271 



Classification of the Senses, 271. The Doctrine of Specific Nerve Energies, 

 273. The Weber-Fechner Psychophysical Law, 275. 



CHAPTER XV. CUTANEOUS AND INTERNAL SENSATIONS 278 



General Classification, 278. Protopathic, Epicritic, and Deep Sensibility, 278. 

 The Punctiform Distribution of the Cutaneous Senses, 280. Specific Nerve Ener- 

 gies of the Cutaneous Nerves, 281. The Temperature Senses, 282. The Sense of 

 Pressure, 283. The Threshold Stimulus and the Localizing Power, 283. The 

 Pain Sense, 286. Localization or Projection of Pain Sensations, 286. Reflected 

 or Misreferred Pains, 287. Muscular or Deep Sensibility, 287. The Quality of the 

 Muscular Sensibility, 289. Sensations of Hunger and Thirst, 290. The Sense 

 of Thirst, 290. 



CHAPTER XVI. SENSATIONS OF TASTE AND SMELL . . . 294 



The Nerves of Taste, 294. The End-organ of the Taste Fibers, 296. Classi- 

 fication of Taste Sensations, 296. Distribution and Specific Energy of the Fun- 

 damental Taste Sensations, 297. Method of Sapid Stimulation, 298. The 

 Threshold Stimulus for Taste, 299. The Olfactory Organ, 299. The Mech- 

 anism of Smelling, 300. Nature of the Olf acton- Stimulus, 301. The Qualities 

 of the Olfactory Sensations, 301. Fatigue of the Olfactory Apparatus, 303. 

 Delicacy of the' Olfactory Sense, 303. Conflict of Olfactory Sensations, 305. 

 Olfactory Associations, 305. 



CHAPTER XVII. THE EYE AS AN OPTICAL INSTRUMENT. DIOPTRICS 



OP THE EYE 306 



Formation of an Image by a Biconvex Lens, 306. Formation of an Image in 

 the Eye, 309. The Inversion of the Image on the Retina, 311. The Size of the 

 Retinal Image, 312. Accommodation of the Eye, 313. Limit of the Power 

 of Accommodation and Near Point of Distinct Vision, 316. Far Point of Dis- 

 tinct Vision, 316. The Refractive Power of the Surfaces in the Eye, 317. 

 Optical Defects of the Normal Eye, 319. Spherical Aberration, 319. Abnor- 

 malities in the Refraction of the Eye, Ametropia, 319. Myopia, 320. Hyper- 

 metropia, 321. Presbyopia, 321. Astigmatism, 322. Innervation and Control 

 of the Ciliary Muscle and the Muscles of the Iris, 324. The Accommodation 

 Reflex and the Light Reflex. 326. Action of Drugs upon the Iris, 328. The Antag- 

 onism of the Sphincter and Dilator Muscles of the Iris, 329. Intra-ocular Pressure, 

 330. The Ophthalmoscope, 331. Retinoscope, 333. Ophthalmometer, 334. 



CHAPTER XVIII. THE PROPERTIES OF THE RETINA. VISUAL STIMULI 



AND VISUAL SENSATIONS 336 



The Portion of the Retina Stimulated by Light, 336. The Action Current Caused 

 by Stimulation of the Retina, 337. The Visual Purple, Rhodopsin, 338. Extent 

 of the yisual Field, Perimetry, 340. Central and Peripheral Fields of Vision, 

 342. Visual Acuity, 343. Relation Between Stimulus and Sensation, Thresh- 



