938 



INDEX. 



Taurin, 747 

 Taurocholic acid, 747 

 Tectorial membrane, 378 

 Temperature (see Heat) 



effect of, on body metabolism, 842 

 on gases in solution, 621 

 on heart rate, 550 

 on muscular contraction, 28 



of human body, 854 



sense, distribution and character- 

 istics, 260, 263 

 path for, in spinal cord, 167 

 punctiform distribution of, 260 

 Tension of gases in solution, 622 

 Tensor tympani muscle, function of, 



368 



Tenth cranial nerve, nucleus of, 233 

 Testis, internal secretion of, 802 

 Tetanus, number of stimuli necessary 

 for, 42 



of artificial muscle, 71 



of muscle, 39 



opening and closing, 86 

 Theobromin, 778, 836 

 Third cranial nerve, nucleus of, 229 

 Thirst, sense of, 272 

 Thorax, as closed cavity, 592 



aspiratory action of, 608 



normal position of, 592 



origin of negative pressure in, 607 

 Thrombin, 428, 430 

 Thrombokinase, 430 

 Thrombogen, 430 

 Thymus, 798 

 Thyroid, extirpation of, 795 



function of, 797 



internal secretion of, 794 

 theory of (Cyon), 797 

 Tidal air, 601 



Tigroid substance in nerve cells, 128 

 Tissue protein, 812 

 Tissues, exchanges of gases in, 629 

 Tone (musical) of muscular contrac- 

 tion, 41 

 Tonicity of heart muscle, 529 



of muscle, 48 



of nerve centers, 145 

 Touch sense, path of, in cord, 167 

 Tracts in spinal cord, 158 



of Burdach, 160, 163 



of Flechsig, 160, 165 



of Goll, 160, 163 



of Cowers, 160, 165 



of Helweg (olivo-spinal), 172 



of Monakow (rubro-spinal). 171, 

 187 



in cerebellum, 220 

 Traube-Hering waves, 564 

 Treppe of muscular contractions, 33 

 Trigeminal nerve, area of distribu- 

 tion of, 231 

 ' nucleus of, 230 



Tritanopia, 334 



Trophic nerve fibers, salivary glands, 



693 



Trypsin, 683, 726 

 Tryptophan, 728 



Turck's method for reflex time, 142 

 Twelfth cranial nerve, nucleus of, 



233 



Tympanic membrane, 364 

 Tyrosin, 727, 907 



UNIPOLAR method of stimulation, 87 

 Urea, formation of, in liver, 758 



origin and significance of, 774, 815 

 Ureters, contractions of, 783 

 Urethra, sphincter of, 785 

 Uric acid, 61 



in spleen, 761 

 significance of, 777, 816 

 Uricolytic enzyme, 779 

 Urinary bladder, movements of, 784 

 nerves of, 787 



pigments, 772 

 Urination, physiological mechanism 



of, 783 

 Urine, composition of, 772 



nitrogenous excreta of, 773 



origin of acidity of, 768, 772 



reaction of, 772 



secretion of, 763 



secretion pressure of, 767 

 Uterus, changes of, during menstrua- 

 tion, 875 



effect of, on mammary glands, 889 

 Utriculus, function of, 389 



VAGUS nerve, action of, on gastric 



secretion, 708 



on heart, 531 (see also In- 

 hibition) 

 on pancreas, 722 



as motor nerve to stomach, 664 



nucleus of, 233 



relations of, to respiratory cen- 

 ter, 635 



Vasomotor fibers, centers for, in cord, 

 564 



in brain, 580 



to pulmonary arteries, 571 

 nerves, action of, in heat regula- 

 tion, 862 



antidromic impulses in, 568 



course and distribution, 555, 568 



general properties of dilators, 565 



history of discovery of, 551 



methods used to demonstrate 

 552 



of heart, 570 



position of constrictor center, 558 



reflex actions of, 560 



rhythmical action of constrictor 

 center, 564 



