1058 



INDEX. 



Sweat, amount and composition of, 



867 



nerve-centers for, 870 

 nerves, action of, in heat regula- 

 tion, 968 



secretory fibers of, 869 

 Sympathetic nervous system, general 



relations, 251 

 resonance, 398 

 Syntonin, 787 



Systole, duration of, in heart, 560 

 Systolic arterial pressure, 495 



determination of, in animals, 



497 

 in man, 503 



TABES dorsalis, 171 

 Tactile discrimination, 175 



localization, 287 

 Taste buds, 296 



center for, in brain, 218 



nerves of, 294 



sensations, classification of, 296 

 specific, energy of, 297 

 threshold stimulus, 299 



sense of, 294 



stimuli, mode of action, 298 

 Tectorial membrane, 400 

 Temperature. See Heat. 



coefficient, 114 



effect of, on body metabolism, 944 

 on gases in solution, 677 

 on heart-rate, 604 

 on muscular contraction, 29 



of human body, 959 



sense, distribution and character- 

 istics, 280, 282 

 path for, in spinal cord, 174 

 punctiform distribution of, 280 

 Tension of gases in solution, 679 

 Tensor tympani muscle, function of, 



394 



Tenth cranial nerve, nucleus of, 249 

 Testis, internal secretion of, 893 

 Tetanus, number of stimuli necessary 

 for, 45 



of muscle, 42 



opening and closing, 90 

 Tethelin, 891 

 Theobromin. 857, 936 

 Third cranial nerve, nucleus of, 246 



heart sound, 558 

 Thirst, sense of, 293 

 Thoracic autonomies, 739, 740 

 Thorax as cloSed cavity, 648 



aspiratory action of, 665 



normal position of, 649 



origin of negative pressure in, 664 

 Thrombin, 457 



method of obtaining, 458 

 Thrombogen, 458 



Thrombokinase, 462 

 Thromboplastic substances, 461 

 Thrombosis, 455 

 Thyroid, extirpation of, 875 



function of, 878 



internal secretion of, 874 

 Thyro-oxy-indol, 879 

 Thyrotoxin, 879 

 Tidal air, 657 



Tigroid substance in nerve-cells, 134 

 Tissue protein, 904 

 Tissues, exchanges of gases in, 688 

 Tone (musical) of muscular contrac- 

 tion, 44 

 Tonicity of heart-muscle, 583 



of muscle, 51 



of nerve-centers, 153 

 Tonometer, 680 

 Tonus, myogenic, 57 



neurogenic, 56 



Touch sense, path of, in cord, 174 

 Tract of Lissauer, 168, 169 

 Tracts in cerebellum, 235 



in spinal cord, 165 



of Flechsig, 167 



of Cowers, 167 



of Helweg (olivospinal), 181 



of Monakow (rubrospinal), 180, 199 

 Traube-Hering waves, 620 

 Treppe in muscular contractions, 35 

 Trigeminal nerve, area of distribu- 

 tion of, 247 

 nucleus of, 247 

 Tritanopia, 355 

 Trophic nerve-fibers, salivary glands, 



764 



Trypsin, 753, 798 

 Tryptophan, 801, 912 

 Tiirck's method for reflex time, 149 

 Twelfth cranial nerve, nucleus of, 



251 



Tympanic membrane, 386 

 Tyrosin. 800, 912, 1025 



reagent, 1028 



UNCONDITIONED reflexes, 190 

 Unipolar method of stimulation, 91 

 Unitarian theory (blood-corpuscles), 



444 

 Urea, formation of, in liver, 835 



origin and significance of, 853, 1025 

 Ureters, contractions of, 863 

 Urethra, sphincter of, 864 

 Uric acid, 63, 856 

 in spleen, 838 

 significance of, 856 

 Uricolytic enzyme, 859 

 Urinary bladder, movements of, 864 

 nerves of, 866 



pigments, 851 

 Urination, physiological mechanism 



of, 863 



