1268 



Speech, 453, 520-527 



intellectual basis of, 455 

 mechanism of, 525 



Spermaceti, 56 



Spermatids, 1208 



Spermatocytes, 1208 



Spermatozoa, development of, 1208 



Spherical aberration, 537 



Sphincter pupillae, 550 

 trigoni, 1153 

 urogenitalis, 1153 



Sphingomyeline, 57 



Sphygmographs, 922 



Spinal animal, 329, 393 



Spinal cord, afferent path, 328 



anterior cerebellar tract, 354 

 t5oTumns. 356. 



ing tracts, 352, 354 



column, 324 

 1318 



Dmmns, 318 

 central canal, 300 

 Clarke's column, 318 

 collaterals in, 324, 351, 357 

 commTtract, 353 

 commissural cells, 318 

 conduction in, 351-360 

 crossed pyramidal tract, 353 

 descending tracts, 352 

 development, 299 

 direct cerebellar tract, 354 



pyramidal tract, 352 

 dorsal cerebellar tract, 354 

 effect] of poisons, 347 

 efferent path, 327 

 endogenous fibres, 352 

 Golgi cells, 318 

 Golls' column, 324 

 Gower's tract, 356 

 Helweg's bundle, 353 

 hemisection, 359 

 lateral basis bundle, 371 

 lateral columns, 3J>4 

 Lissauer's tract, 324, 352, 357 

 Marie's tract, 354 

 Monakow's bundle, 353 

 motor-cells, 318 

 olivd-spinal tract, 353 

 pain impulses, 359 

 path of impulses^&LJj. 

 posterior columns, 354 

 postero-external column, 324 

 pre-pyramidal tract, 353 

 pyramidal tracts, 352 

 as reflex centre, 322 

 rubro-spinal tract, 353 

 sensori-motor path, 357 

 septo-marginal bundle, 354 

 structure, 315 

 thalamico-spinal tract, 353 

 tracts, methods of tracing, 319 

 trophic functions, 349 

 ventral cerebellar tract, 354 

 vestibulo-spinal tract, 353 

 Wallerian degeneration' 352 

 white matter, arrangement, 351 



Spinal dog, 331 

 shock, 330 



Spino-tectal tract, 356 



Spino-thalamic tract, 356 



Spiral ganglion, 517 



INDEX 



Spiral lamina, 517 

 Splanchnic nerve, 996 

 Spleen, function of, 1195 



rhythmic contractions of, 1195 

 structure of, 1194 

 Spongin, 108 

 Spongioblasts, 252, 298 

 Spongioplasm, 18 

 Staircase phenomenon, 245 



in heart muscle, 956 

 Stannius' ligature, 940 

 Stapedius muscle, 514 

 Stapes, 513 

 Starches, 68 

 Starch, digestion by saliva, 662 



hydrolysis of, 68, 99 



molecular weight, 68 



soluble, 68 



structure of, 69 



Starvation, carbohydrate metabolism in, 

 628 



fat metabolism in, 630 



loss in various organs, 625 



metabolism in, 624-630 



protein metabolism in, 630, 633 

 Static ataxy, 346 

 Stearic acid, 54 / 

 Stearyl-lecithin, 57 

 Stellate ganglion, 466 

 Stepping reflex, 332 

 Stercobilin, origin of, 715 

 Stereoisomerism, 52, 60, 78 

 Stereosomers, action of ferments on, 167 

 Stereoscope, 593 

 Stereoscopic vision, 593 

 Sternzellen, 816 

 Stimulation, electrical, nature of, 270 



of human nerve, 268 

 Stimuli, summation of, 245 

 Stimulus, intensity of, 482 



liminal, 482 



locus of, 339 



maximal, 193, 205 



minimal, 193, 205 



threshold, 483 

 Stokes-Adams disease, 955 

 Stomach, digestion in, 683-696 



innervation, 700 



movements of, 697 



secretory nerves of, 691 



sphincters, 701 

 Stratum granulosum, 1161 

 Stratum lucidum, 1161 

 Stria terminalis, 377 

 Striae acousticse, 379, 380 

 Striated muscle, structure of, 179 



of invertebrates, 248 

 String galvanometer, 228 

 Stromuhr, Ludwig's, 888 



Starling's, 888 

 Structural basis of body, 13 

 Strychnine, effect on cord. 347 



spasm, electrical variation, 242 

 Sturin, composition of, 91 

 Sublingual gland, 663 

 Submaxillary ganglion, 473, 666 



gland, 663 

 Substantia gelatinosa of Rolando, 316 



nigra, 374, 377, 383 

 Substrate, 164 



effect of ferments on, 167 



