1045 



Muscle, pale fibers in, 19, 20, 26 



pigments of, 64 



plain, 54 



plasma, 19, 60 



production of carbon dioxid in, 64 



proteins of, 60 



red fibers in, 19, 20, 26 



sarcoplasm, 19 



simple contraction of, 25 



smooth, 54 



strain, 75 



stroma, 61 



structure by polarized light, 20 

 of fiber, 18 



summation of contractions of, 44 



theories of nature of contraction, 71 



tone of, during contraction, 44 



tonicity of, 50 



vasomotor supply of, 629 



voluntary contractions of, 46 



white and red fibers of, 19, 20 

 Muscle-sense, cortical area for, 202 



importance of, in visual judgments, 

 374 



paths for, in spinal cord, 170, 173 



quality of, 285 

 Muscular contraction, electrical varia- 

 tion in, 105 

 intermediary chemical products 

 in, 65 



insufficiency in movements of eye- 

 balls, 367 

 or deep sensibility, 284 



work, effect of, on heart-rate, 589 

 on physiological oxidations, 933 

 on protein metabolism, 944 

 on respiratory movements, 700 

 Musical sounds, classification and 



properties of, 391 

 Mutations, theories of, 1005 

 Mydriasis, definition of, 324 

 MyeUn sheath of nerve-fibers, func- 

 tion of, 78 

 Myelinization method of Flechsig, 



162, 223 

 Myeloblasts, 440 

 Myenteric reflex, 723 

 Myofibrillse (of plain muscle), 54 

 Myogen, 61 



fibrin, 61 

 Myogenic theory of heart^beat, 563 



tonus, 56 

 Myohematin, 435 

 Myopia, 316 

 Myosin, 61 



fibrin, 61 

 Myotonia congenita, 32 

 Myxedema, 865 



Naecosis, effect of, upon nerve im- 

 pulse, 116 

 Near point of distinct vision, 311 



Negative pressure in thorax, 652, 654 

 in ventricle, 558 

 variation in muscle and nerve, 104, 

 105 



Nerve, abducens, nucleus of, 245 

 auditory, 211 



chorda tympani, 290, 748, 750 

 facial, nucleus of, 245 

 fourth cranial, nucleus of, 243 

 glossopharyngeal, nucleus of, 245 

 hemorrhoidalis inferior, 729 

 hypoglossal, nucleus of, 246 

 motor and sensory roots of, 83 

 olfactory, 213 

 optic, 206 

 pudendus, 729 

 recurrent, sensibility of anterior 



roots, 84 

 secretory, of adrenal glands, 875 

 spinal accessory, nucleus of, 246 

 third cranial, nucleus of, 242 

 trigeminal, nucleus of, 245 

 twelfth cranial, nucleus of, 246 

 vagus, nucleus of, 246 



Nerve-cell, chromatolysis of, 127 

 classification of, in spinal cord, 160 

 degenerative changes in, 127 

 general physiology of, 134 

 internal structure of, 134 

 metabolism in, 137 

 neuron doctrine, 129 

 reaction of, 135 

 refractory period of, 137 

 summation of stimuli in, 137 

 varieties of, 131 

 Nerve-fibers, action current of, 104 

 afferent and efferent, 81 

 aiiodal and cathodal stimulation of, 



88 

 artificial stimuli of, 86 

 autoregeneration of, 126 

 chemistry of, 79 

 classification of, 82 

 flegeneration and regeneration of, 



124 

 demarcation current of, 97 

 direction of conduction, 114 

 du Bois-Revmond's law of stimu- 

 lation, 88" 

 electrical stimulation of, in man, 95 

 electrotonic currents of, 109 

 electrotonus of, 89 

 impulse in, historical, 40 

 independent irritability of, 86 

 metabolism in, during activity, 119 

 myelin sheath of, 78 

 nutritive relations to nerve-cells, 123 

 opening and closing tetanus of, 92 

 Pfliiger's law of stimulation of, 94 

 stimulation of, in man, 92 

 structure of, 77 

 unipolar method of stimulating, 93 



