10 CONTENTS. 



CHAPTER IX. 



PHYSIOLOGICAL ANATOMY AND GENEBAL PEOPEETIES OF THE SPINAL 



COED. 



General arrangement of the cerebro-spiual axis Membranes of the encephalon 

 and spinal cord Cephalo-rachidian fluid Physiological anatomy of the 

 spinal cord Direction of the fibres after they have penetrated the cord by 

 the roots of the spinal nerves General properties of the spinal cord 

 Effects of stimulation applied directly to different portions of the 

 cord, Page 257 



CHAPTER X. 



ACTION OF THE SPINAL COED AS A CONDUCTOE. 



Transmission of motor stimulus in the cord Decussation of the motor conduct- 

 ors of the cord Decussation at the medulla oblongata Decussation of the 

 motor conductors in the cervical portion of the cord Transmission of sen- 

 sory impressions in the cord The white substance of the posterior columns 

 does not conduct sensory impressions Action of the gray matter as a 

 conductor Probable function of the cord in connection with muscular 

 coordination Decussation of the sensory conductors of the cord Summary 

 of the action.of the cord as a conductor, 279 



CHAPTER XI. 



ACTION OF THE SPINAL COED AS A NEEVE-CEXTEE. 



Movements in decapitated animals Definition and applications of the term 

 " reflex " Reflex action of the spinal cord History of the discovery of 

 so-called reflex action Question of sensation and volition in frogs after 

 decapitation Character of movements following irritation of the surface 

 in decapitated animals Dispersion of impressions in the cord Conditions 

 essential to the manifestation of reflex phenomena Exaggeration of reflex 

 excitability by decapitation, poisoning with strychnine, etc. Reflex phe- 

 nomena observed in the human subject, 298 



CHAPTER XII. 



THE CEEEBEAL HEMISPHEEES. 



Physiological divisions of the encephalon Weight of different parts of the 

 brain and of the entire encephalon Some points in the physiological anat- 



