932 



INDEX. 



NARCOSIS, effect of, upon nerve im- 

 pulse, 109 



Near point of distance vision, 296 

 Negative pressure in thorax, 605, 607 



in ventricle, 510 

 variation in muscle and nerve, 96, 



98 



Nerve, abducens, nucleus of, 232 

 auditory, 201 



chorda tympani, 274, 688, 691 

 facial, nucleus of, 232 

 fourth cranial, nucleus of, 230 

 glossopharyngeal, nucleus of, 232 

 hypoglossal, nucleus of, 233 

 motor and sensory roots of, 77 

 olfactory, 204 

 optic, 195 

 recurrent sensibility of anterior 



roots, 77 



spinal accessory, nucleus of, 233 

 third cranial, nucleus of, 229 

 trigeminal, nucleus of, 230 

 twelfth cranial, nucleus of, 233 

 vagus, nucleus of, 233 

 Nerve-cell, chromatolysis of, 121 



classification of, in spinal cord, 



155 



degenerative changes in, 121 

 general physiology of, 129 

 internal structure of, 127 

 metabolism in, 130 

 neuron doctrine, 123 

 reaction of, 129 

 refractory period of, 133 

 summation of stimuli in, 130 

 varieties of, 125 



Nerve-fibers, action current of, 96 

 afferent and efferent, 75 

 anodal and cathodal stimulation 



of, 82 



antidromic impulses in, 78 

 artificial stimuli of, 80 

 autoregeneration of, 120 

 classification of, 75 

 core model of, 102 

 degeneration and regeneration 



of, 118 



demarcation current of, 91 

 direction of conduction, 107 

 du Bois-Reymond's law of stim- 

 ulation, 82 

 electrical stimulation of, in man, 



89 



electrotonic currents of, 101 

 electrotonus of, 83 

 impulse in, historical, 104 

 independent irritability of, 80 

 metabolism in, during activity, 



112 



myelin sheath of, 73 

 nutritive relations to nerve cells, 

 117 



Nerve-fibers, opening and closing tet- 

 anus of, 86 



Pfliiger's law of stimulation of, 84 

 stimulation of, in man, 86 

 structure of, 73 

 unipolar method of stimulating, 



87 



Nerve-impulse, historical, 104 

 metabolism during, 111 

 modification of, by various in- 

 fluences, 109 



qualitative changes in, 76, 116 

 relation of, to action current, 100, 



107 



theories of, 113 

 velocity of, 105 

 Nervi erigentes, 239, 565, 583 

 Neurogenic theory of heart beat, 516 

 Neuron doctrine, 123 

 Neurons, varieties of, 125 

 Nicotin, action of, on salivary secre- 

 tion, 697 



on sweat secretion, 790 

 use of, in tracing autonomic fibers, 



236 



Night-blindness, hemeralopia, 339 

 Ninth cranial nerve, nucleus of, 232 

 Nissl's granules, 128 

 Nitric oxid hemoglobin, 404 

 Nitrogen, condition of, in blood, 623 

 determination of, 809 

 equilibrium, 808 



effect of non-protein food on, 811 

 excretion in urine, 773 

 Nitrogenous extractives of muscle, 61 

 Nodal point of eye, 290 

 Non-polarizable electrodes, 95 

 Normoblasts, 414 

 Nuclease, 779 

 Nucleo-albumin, general properties 



of, 911 

 in bile, 748 

 Nucleon, 60 

 Nucleoproteins, 913 

 in blood, 426 

 intermediary metabolism of, 816 



OBESITY, physiological cause of, 829 

 Ohm's law of composition of sound 



waves, 375 

 Olf action, end-organ for, 279 



mechanism of, 280 

 Olfactometer, 284 

 Olfactory associations, 285 



bulb, histological structure of, 204 



center in cortex, 204 



nerve, course of fibers of, in brain, 

 204 



organs, fatigue of, 283 



sensations, classification of, 281 

 conflict of, 285 

 qualities of, 281 



