INDEX. 



1051 



Muscle, simple contraction of, 25 

 smooth, 55 

 stroma, 61 

 structure by polarized light, 19 



of fiber, IS 



summation of contractions of, 44 

 theories of nature of contraction, 



71 



tone of, during contraction, 44 

 tonicity of, 51 

 vasomotor supply of, 641 

 voluntary contractions of, 46- 

 white and red fibers of, 19 

 Muscle-sense, cortical area for, 203 

 importance of, in visual judgments, 



377 



paths for, in spinal cord, 172, 174 

 quality of, 289 



Muscular contraction, electrical varia- 

 tion in, 105 

 intermediary chemical products 



in, 65 



insufficiency in movements of eye- 

 balls, 370 



or deep sensibility, 288 

 work, effect of, on heart-rate, 602 

 on physiological oxidations, 941 

 on protein metabolism, 942 

 on respiratory movements, 710 

 Musical sounds, classification and 



properties of, 394 

 Mutations, theories of, 1012 

 Mydriasis, definition of, 328 

 Myelin sheath of nerve-fibers, func- 

 tion of, 76 

 Myelinization method of Flechsig, 



164, 226 



Myeloblasts, 444 

 Myenteric reflex, 732 

 Myofibrillae (of plain muscle), 55 

 Myogen, 61 

 fibrin, 61 

 Myogenic theory of heart-beat, 571 



tonus, 57 

 Myohematin, 438 

 Myopia, 320 

 Myosin, 61 

 fibrin, 61 

 Myxedema, 875 



NARCOSIS, effect of, upon nerve im- 

 pulse, 115 



Near point of distinct vision, 316 



Negative pressure in thorax, 662, 664 



in ventricle, 564 



variation in muscle and nerve, 102, 

 103 



Nerve, abducens, nucleus of, 249 

 auditory, 213 



chorda tympani, 294, 759, 761 

 facial, nucleus of, 249 



Nerve, fourth cranial nucleus of, 247 



glossopharyngeal, nucleus of, 249 



hemorrhoidalis inferior, 739 



hypoglossal, nucleus of, 250 



motor and sensory roots of, 81 



olfactory, 216 



optic, 208 



pudendus, 739 



recurrent, sensibility of anterior 

 roots, 82 



secretory, of adrenal glands, 886 



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, 127 



classification of, in spinal cord, 162 



degenerative changes in, 126 



general physiology of, 135 



internal structure of, 134 



metabolism in, 138 



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 stumuli of, 84 



autoregeneration of, 126 



chemistry of, 77 



classification of, 80 



core model of, 108 



degeneration and regeneration of, 

 124 



demarcation current of, 95 



direction of conduction, 113 



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, 109 



independent irritability of, 84 



metabolism in, during activity, 118 



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, 109 



metabolism during, 118 



modification of, by various influ- 

 ences, 114 



qualitative changes in, 80, 121 



