INDEX. 



1035 



Muscular insufficiency in movements 



of eye-balls, 370 

 or deep sensibility, 287 



work, effect of, on heart-rate, 598 

 on physiological oxidations, 930 

 on protein metabolism, 931 

 on respiratory movements, 704 

 Musical sounds, classification and 



properties of, 394 

 Mutations, theories of, 996 

 Mydriasis, definition of, 328 

 Myelin sheath of nerve-fibers, func- 

 tion of, 76 

 Myelinization method of Flechsig, 



164, 226 



Myeloblasts, 443 

 Myenteric reflex, 726 

 Myofibrillae (of plain muscle), 55 

 Myogen, 62 



fibrin, 62 

 Myogenic theory of heart-beat, 567 



tonus, 57 

 Myohematin, 437 

 Myopia, 320 

 Myosin, 62 



fibrin, 62 

 Myxedema, 868 



NARCOSIS, effect of, upon nerve im- 

 pulse, 116 



Near point of distinct vision, 316 



Negative pressure in thorax, 658, 660 



in ventricle, 560 



variation in muscle and nerve, 102, 

 103 



Nerve, abducens, nucleus of, 249 

 auditory, 213 



chorda tympani, 294, 753, 755 

 facial, nucleus of, 249 

 fourth cranial, nucleus of, 247 

 glossopharyngeal, nucleus of, 249 

 hemorrhoidalis inferior, 733 

 hypoglossal, nucleus of, 250 

 motor and sensory roots of, 81 

 olfactory, 216 

 optic, 208 

 pudendus, 733 

 recurrent, sensibility of anterior 



roots, 82 



secretory, of adrenal glands, 878 

 spinal accessory, nucleus of, 250 

 third cranial, nucleus of, 246 

 trigeminal, nucleus of, 247 

 twelfth cranial, nucleus of, 250 

 vagus, nucleus of, 249 



Nerve-cell, chromatolysis of, 128 

 classification of, in spinal cord, 162 

 degenerative changes in, 127 

 general physiology of, 135 

 internal structure of, 134 

 metabolism in, 138 



Nerve-cell, neuron doctrine, 129 



reaction of, 136 



refractory period of, 139 



summation of stimuli in, 138 



varieties of, 131 

 Nerve-fibers, action current of, 102 



afferent and efferent, 79 



anodal and cathodal stimulation of, 

 87 



antidromic impulses in, 82 



artificial stimuli of, 84 



autoregeneration of, 127 



chemistry of, 77 



classification of, 80 



core model of, 108 



degeneration and regeneration of, 

 125 



demarcation current of, 95 



direction of conduction, 114 



du Bois-Reymond's law of stimu- 

 lation, 86 



electrical stimulation of, in man, 93 



electrotonic currents of, 107 



electrotonus of, 87 



impulse in, historical, 110 



independent irritability of, 84 



metabolism in, during activity, 119 



myelin sheath of, 76 



nutritive relations to nerve-cells, 

 123 



opening and closing tetanus of, 90 



Pfluger's law of stimulation of, 92 



stimulation of, in man, 90 



structure of, 75 



unipolar method of stimulating, 91 

 Nerve-impulse, historical, 110 



metabolism during, 119 



modification of, by various influ- 

 ences, 116 



qualitative changes in, 80, 122 



relation of, to action current, 105, 

 114 



theories of, 120 



velocity of, 111 

 Nervi erigentes, 256, 617, 636 

 Nervous secretion, gastric, 777 



pancreatic, 791 

 Neurogenic theory of heart-beat, 566 



tonus, 57 



Neuron doctrine, 129 

 Neurons, varieties of, 131 

 Nicotin, action of, on salivary secre- 

 tion, 762 

 on sweat secretion, 863 



use of, in tracing autonomic fibers, 



254 



Night-blindness, hemeralopia, 360 

 Ninhydrin reaction, for protein, 1012 

 Ninth cranial nerve, nucleus of, 249 

 Nissl's granules, 134 

 Nitric oxid hemoglobin, 429 

 Nitrogen, condition of, in blood, 676 



