TRACH EOSTENOSIS 



1529 



TRACT 



matttiv, to inspect]. Inspection of the interior of the 

 trachea, by means of a laryngoscopic mirror and re- 

 flected light. 



Tracheostenosis (tra-ke-o-ste-no f -sis) [rpaxtia. trachea : 

 orevuaig, stenosis]. Abnormal constriction of me 

 trachea. 



Tracheotome (tra' -ke-o-tom) \rpaxela, trachea ; rouij, 

 a cutting] . A cutting instrument used in tracheotomy. 



Tracheotomy (tra-ke-ot'-o-me) [rpaxeia, trachea ; roufi, 

 a cutting]. Surgical incision of the trachea. T., In- 

 ferior, one performed below the isthmus of the thyroid 

 gland. T., Plunge-. See Plunge-tracheotomy. T., 

 Superior, one performed above the isthmus of the 

 thyroid gland. T.-tube, a tube to be worn in the 

 opening made in tracheotomy, and through which 

 breathing is carried on. 



Trachitis \tra-ki r -tis) [rpaxtl*, trachea; trie, inflamma- 

 tion]. Inflammation of the trachea ; it may be acute 

 or chronic. It is marked by tenderness along the 

 course of the trachea and pain on swallowing. 



Trachoma [tra-ko'-mah) [rpaxH, rough : //., Tracho- 

 •]. Granular conjunctivitis, a contagious disease 

 of the eyelids that may in severe cases extend to the 

 globe of the eye. It is at first characterized by sago- 

 like elevations 

 of the palpebral 

 conjunctiva, and 

 later by fibrous 

 and cicatricial tis- 

 sue that by fric- 

 tion produces 

 pann us. The 

 disease is due to 



! a specific diplo- 



i coccus. T. arlti, 

 the granular 

 form. T., 

 Brawny, a late 



■ stage of mixed 



: trachoma in 



'• which the surface 

 of the conjunctiva 

 is rather smooth, 

 although lymph- 

 oid infiltration persists. T.-Coccus. See Bacteria, 

 mymatic Table of. T. diffusum, a high degree 

 of mixed trachoma in which large growths cover the 

 tarsal conjunctiva. T., Follicular, T., Mixed, the 

 usual form of trachoma. See T. arlti. T.-gland. 

 Hand. T. verum. See T. arlti. Horny Epi- 

 thelium, or Summer Granulations, a form of tracho- 



Trachoma. 



Improved Roller Trachoma-forceps. 



onjunctivitis similar in appearance to follicular 

 achoma, but differing from it in the fact that the 

 ales or excrescences are horny or teat-like eleva- 

 The name Hypertrophic Trachomatous Con- 

 tn/tis has been proposed for it. Knapp's 

 er-forceps Method (of treating trachoma), 

 expression of the gelatinous matter in follicular 

 oma by a roller-forceps. 



carpous (trak - ik - ar'-pus ) [rpax'T, rough ; 

 oc, fruit]. In biology, having the fruit roughened, 

 yphonia itrak-if-o' '-ne-ah) [rpax'c, rough; owii,, 

 voice]. Roughness, or hoarseness, of voice, 

 rachysma (trak-iz'-mah). Synonvm of Trachoma. 





Trachyspermous (trak - is -per'- mus) [rpaxix, rough ; 

 a-epua, seed]. In biology, having the seed rough- 

 ened . 

 Tract (trait) [tractus]. i. An extended area, usually 

 much longer than it is broad. 2. Any one of the col- 

 umns of white matter of the spinal cord. See Column. 

 3. A track or course. T., Alimentary, a musculo- 

 membranous canal, about 30 feet in length, extend- 

 ing from the mouth to the anus. Digestion is its 

 chief function, and in this it is aided by certain 

 accessory organs. T., Anterior Cerebro- pontile, a 

 tract of fibers of the eras cerebri extending from the 

 anterior portion of the frontal lobe to the pons. T., 

 Anterior Pyramidal. See T., Pyramidal. T., 

 Antero-lateral Ascending. Synonym of T. , 

 Cowers'. T., Bechterew's. See T., Tegmental. 

 T., Bulbar, any of the tracts of fibers found in the 

 bulb or oblongata. T., Central Medullary, the gray 

 matter of the spinal cord immediately about the central 

 canal. T., Cerebellar. See T. , Direct Cerebellar. 

 T., Cerebro-pontile, a tract of fibers passing from 

 the cerebrum through the internal capsule and crus to 

 the pons. T., Commissural, the cerebellar peduncle 

 (Owen). T., Crossed Thalamotegmental, a tract 

 of fibers passing through the tegmentum and con- 

 necting the thalamus with the spinal cord (Spitzka). 

 T., Digestive. See 71, Alimentary. T., Direct 

 Cerebellar, an ascending tract of fibers placed at the 

 periphery of the posterior portion of the lateral col- 

 umn of the cord. It passes upward through the lateral 

 tract of the oblongata, the restiform body, and the infe- 

 rior cerebellar peduncle to the vermiform process of the 

 cerebellum and to the cerebellar lobes. T., Fillet, 

 a tract of fibers passing from the fillet along the upper 

 and outer side of the red nucleus through the internal 

 capsule to the parietal lobe. T., First Projection, 

 the corona radiata (Meynert). T. of Flechsig. See 

 T., Principal. T., Frontal Pontile. Synonym of 

 T. , Cerebro-pontile. T., Fronto - cerebellar, the 

 tract of fibers connecting the frontal lobe of the 

 brain with the cerebellum. T., Funicular. See 

 Funiculus gracilis. T., Genito-urinary, the genito- 

 urinary organs in continuity. T., Goll's. See Column^ 

 Golfs. T., Gowers', a tract of fibers from the pos- 

 terior roots which ran cephalad in the lateral column. 

 One portion of the fibers disappears in the cervical part 

 of the spinal cord, the other terminates in the medulla. 

 T., Habenular, a tract of fibers passing from the hab- 

 enula to the mesal side of the red nucleus at the base 

 of the brain. T., Intellectual. Synonym of T., 

 Fronto-cerebellar. T., Intermediary Lateral. T., 

 Intermedio-lateral, a tract of nerve -fibers 

 in the lateral column of the spinal cord, 

 placed midway between the anterior and 

 posterior gray horns. T., Internidal, the 

 fibers extending from the nuclei of origin 

 of the third, fourth, and sixth cranial nerves. 

 T., Intestinal, the large and small intes- 

 tine. T,, Lateral. See Column, Lateral. 

 T., Lemniscus, a tract of fibers beginning in the 

 upper region of the pons, below the formatio reticu- 

 laris, and separating into three bundles, the superior, 

 median, and inferior lemnisci. T., Lissauer's, a 

 small tract of fibers in the spinal cord at the junc- 

 tion of the posterior horn and the lateral column. 

 The fibers are derived from the posterior roots, and 

 after a short upward course enter the posterior horn. 

 T., Motor, the path for motor impulses from the 

 brain to a muscle, consisting of a central and a 

 peripheral portion. The former extends from the 

 cerebral cortex to the gray matter in the anterior horns 

 of the spinal cord ; the latter includes the motor cells 



