CONTENTS. XIX 



PAGE 



The Active State of Nerve-fibres, 499 



Nerve Stimuli, 499 



Velocity of Nerve-impulse, 502 



The Electric Changes in Nerves, 504 



Electrotonus, 504 



Irritability of Nerve-fibres, 506 



Law of Contraction, 509 



Nerve Corpuscles and Terminals, 511 



Functions of the Nerve Cells, 513 



CHAPTER XXIX. 



SPECIAL PHYSIOLOGY OF NERVES. 



Spinal Nerves, 517 



The Cranial Nerves, . . . 518 



The Trochlear Nerve, .521 



Portio Dura, etc., 522 



Efferent and Afferent Fibres, 524 



Ganglia of the Fifth Nerve, 526 



The Glosso-pharyngeal Nerve, 527 



The Vagus Nerve, 528 



The Hypoglossal Nerve, 531 



CHAPTER XXX. 



SPECIAL SENSES. 



Skin Sensations, . . 535 



Nerve Endings, 536 



Sense of Locality, 539 



Sense of Pressure, 542 



Temperature Sense, 543 



General Sensations, 545 



CHAPTER XXXI. 



TASTE AND SMELL. 



Sense of Taste, 548 



Sense of Smell 651 



