898 



INDEX. 



Nerve, optic, 194 



recurrent sensibility of anterior 



roots, 77 

 spinal accessory, nucleus of, 230 

 third cranial, nucleus of, 226 

 trigeminal, nucleus of, 227 

 twelfth cranial, nucleus of, 230 

 vagus, nucleus of, 229 

 Nerve-cell, chromato lysis of, 121 



classification of, in spinal cord, 

 154 



degenerative changes in, 120 



general physiology of, 128 



internal structure of, 126 



metabolism in, 129 



neuron doctrine, 122 



reaction of, 129 



refractory period of, 132 



summation of stimuli in, 130 



varieties of, 124 

 Nerve-fibers, action current of, 96 



afferent and efferent, 75 



anodal and cathodal stimula- 

 tion of, 82 



antidromic impulses in, 78 



artificial stimuli of, 80 



classification of, 75 



core model of, 10 



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, 116 



opening and closing tetanus 

 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, 115 



relation of, to action current, 

 100, 107 



theories of, 113 



velocity of, 105 



Nervi erigentes, 236, 545 

 Neurogenic theory of heart beat, 497 

 Neuron doctrine, 122 

 Neurons, varieties of, 124 

 Nicotin, action of, on salivary secre- 

 tion, 676 

 on sweaty secretion, 768 

 use of, in tracing autonomic fibers, 

 233 

 Night-blindness, hemeralopia, 331 

 Ninth cranial nerve, nucleus of, 229 

 Nissl's granules, 127 

 Nitric oxid hemoglobin, 392 

 Nitrogen, condition of, in blood, 602 

 determination of, 784 

 equilibrium, 783 



effect of non-proteid food on, 

 786 

 excretion in urine, 752 

 Nitrogenous extractives of muscle, 61 

 Nodal point of eye, 286 

 Non-polarizable electrodes, 95 

 Normoblasts, 402 



Nucleo-albumin, general properties 

 of, 878 

 in bile, 727 

 Nucleon, 60 

 Nucleoproteids, 880 

 in blood, 414 



Obesity, physiological cause of, 799 

 Ohm's law of composition of sound 



waves, 365 

 Olfaction, end-organ for, 275 



mechanism of, 276 

 Olfactometer, 280 

 Olfactory associations, 281 



bulb, histological structure of, 202 



center in cortex, 202 



nerve, course of fibers of, in brain, 



203 

 organs, fatigue of, 279 

 sensations, classification of, 278 

 conflict of, 281 

 qualities of, 277 

 threshold stimulus, 280 

 sense cells, 276 

 stimuli, nature of, 277 

 Oncometer, 749 

 Ophthalmoscope, 305 

 Opotherapy, 771 



Optic chiasma, decussation in, 195 

 structure of, 194 

 nerve, course of fibers of, in brain, 



193 

 radiation, 193 

 thalamus, functions of, 214 



in vision, 197 

 tracts, structure of, 195 

 Optical deceptions, 350 

 Optograms on retina, 311 



