352 



INDEX AND GLOSSARY 



Threshold, the minimal stimulus 

 which will excite an organ to ac- 

 tivity, 72, 80, 91, 132, 172, 218, 

 252, 254, 255 

 Tickle, 76, 254 



Tigroid bodies, substance, or gran- 

 ules. See Substance, chromo- 

 philic. 



Time, central. See Pause, central, 

 latent. See Pause, central, 

 reaction. See Reaction time. 

 Tissue, the cellular fabric of which 



the body is composed, 24 

 TITCHKNEU, E. B., 70 

 Tone, affective. See Feeling tone 



and Affection, 

 analysis, 198, 199, 202 

 feeling. See Feeling tone and 



Affection. 



muscular, 77, 89, 189, 192 

 nervous, 101, 192 



Tongue, muscles of, 92, 144, 147, 148 

 nerves of, 143, 144, 146-148, 243, 



245 



Touch, apparatus of, 62, 70, 79, 80- 

 83, 131, 132, 137, 138, 139, 141, 

 103-167, 172-180, 242, 243, 245, 

 252, 253, 257, 260 

 reaction time of, 98 

 Toxines. See Poisons. 

 TOZEU. F. M., 180 

 Tract (tractus), a collection of nerve- 

 fibcrs of like origin, termination, 

 and function; cf. Fasciculus, 27, 

 100, 128, 304 

 association; cf. Fibers, association, 



58, (54, 267, 285 

 bulbo-spinal, 157 

 central tcgmcntal. 188 

 cerebello-tegmental, 188 

 comma. See Fasciculus interfas- 



cicularls. 



cortico-bulbar, 161, 169, 170, 181 

 cortico-cerehellar. See Tract, cor- 



tico-pontile. 



cortico-mesencephalic, 289 

 cortico-oculomotor, 170 

 cortico-pontile, 161, 169, 170, 187, 



188, 289 



cortico-rubral, 170, 289 



cortico-spinal (fasciculus ccrebro- 



spinalis, B. X. A., pyramidal 



tract), the voluntary motor 



path from the precentral gy- 



rus of the cerebral cortex to the 



spinal cord, where it divides into 



lateral and ventral parts, 128, 130, 



131, 140, 141, 156, 161, 167, 168, 



170, 181, 188, 192, 282-285, 289, 



293, 310, 311 



Tract, cortico-spinal, lateral (fas- 

 ciculus ccrebro-spinalis later- 

 alis, B. N. A., lateral or 

 crossed pyramidal tract), 130, 

 131, 141 



ventral (fasciculus cerebro- 

 spinalis anterior, B. N. A., 

 ventral or direct pyramidal 

 tract, column of TCRCK), 

 130, 131, 141 



cortico-thalamic, 289 



direct cerebellar. See Tract, 

 spino-cerebellar, dorsal. 



of FLECHSIG. See Tract, spino- 

 cerebcllar, dorsal. 



of GOWERS. See Fasciculus ven- 

 tro-lateralis superficialis. 



habenulo-peduncular (fasciculus 

 retroflexus, MEYNERT'S bundle), 

 165, 220 



of HELAVIG. See Tract, olivo- 

 spinal. 



internuncial, a fiber tract connect- 

 ing two nuclei or centers, 65 



of LISSAUER. See Fasciculus dor- 

 so-lateralis. 



of LOWENTHAL. See Tract, tecto- 

 spinal. 



mamillo-peduncular, 161, 220 



mamillo-thalamic (fasciculus 



thalamo-mamillaris B. N. A., 

 tract of VICQ n'AzYit), 165, 220 



inesencephalic, of V nerve, 161 



of MEYNERT. See Tract, habcn- 

 ulo-peduncular. 



of MONAKOW. See Tract, rubro- 

 spinal. 



nomenclature of, 128 



oUactory (tractus olfactorius), ol- 

 factory fibers of the second 

 order passing from the olfac- 

 tory Bulb to the nuclei of the 

 Area olfactoria. See Stria ol- 

 factoria, 114, 120, 165, 217, 218, 

 219, 220 



olfacto-liypothalarnic, 220 



olfacto-tegmental, 220, 221 



olivo-cerebellar, 155, 176, 188 



