NUCLEUS 



384 



NUCLEUS 



polar nerve-cells provided with a nucleated sheath like 

 the nerve-cells of ganglia contained in some cinerea 

 situated between the superior root of the auditory 

 nerve and the restis. N., Auditory, Chief or Prin- 

 cipal. See N., Auditory Internal. N., Auditory 

 External, a tract of large nerve-cells lying in the ob- 

 longata between the inner portion of the cerebral 

 peduncles and the restis ; it is widest at the upper ex- 

 tremity in the superior fovea and tapers down to 

 the auditory striae. Syn., N., Deiters' ; N., Laura's; 

 JV., Superior Auditory ; A T ., Auditory Great, or Lat- 

 eral or Large-celled ; JV., Acoustic Anterior ; JV., 

 Acoustic Lateral or Superior. N., Auditory, Great, 

 N., Auditory Large-celled, N., Auditory Lateral. 

 See A r ., Auditory External. N., Auditory In- 

 ternal, a columnar tract of small multipolar cells 

 embedded in the auditory eminence, being widest 

 where it is crossed by the striae. N., Beclard's, a vas- 

 cular bony nucleus, of lenticular shape, appearing in 

 the cartilage of the lower epiphysis of the femur dur- 

 ing the thirty-seventh week of fetal life. N., Blu- 

 menau's, the lateral nucleus of the cuneate nucleus. 

 N., Bony, the center of ossification. N. bulbi 

 fornicis,- a collection of cinerea in the bulb of the 

 fornix. N., Burdach's, a small nucleus of gray 

 matter in the funiculus cuneatus of the oblongata form- 

 ing the termination of the long fibers of Burdach's 

 column. Syn., JV., Cuneate; JV., Clavate ; JV. of 

 the funiculus gracilis. N., Clavate. See JV., Bur- 

 dock's. N. centralis, the dentatum. N. cen- 

 tralis inferior, a ganglionic mass in the oblongata at 

 the posterior border and near the raphe of the pons. 

 N. centralis superior, a ganglionic mass in the 

 tegmentum ; it is the cephalic continuation of the 

 nucleus reticularis. N. cochlearis, that of the 

 cochlear division of the auditory nerve. N., Con- 

 jugation. See JV., Segmentation (Illus. Diet.). 

 N., Cuneate, N., Cuneate Internal. See JV., 

 Burdach's. N., Cuneate External, a tract of 

 gray matter contained in the external cuneate fu- 

 nicle. N., Cuneiform. See Ala cinerea (Illus. 

 Diet.). N., Darkschewitsch's, a nucleus sit- 

 uated on each side of the median line in the 

 gray matter near the junction of the sylvian aque- 

 duct with the third ventricle. N., Deiters.' See 

 JV., Auditory External. N., Dorsal, N. dorsalis. 

 Same as Clarke's column or nucleus. N., Duval's, 

 an aggregation of large multipolar ganglion cells lying 

 ventrolaterally to the hypoglossal nucleus. N., Ed- 

 inger's, the nucleus of the posterior longitudinal 

 bundle, an aggregation of ganglion cells in the gray 

 matter of the third ventricle at the beginning of the 

 sylvian aqueduct. N., Edinger-Westphal's, one 

 of the nuclei of the third cranial nerve.in the region 

 of the anterior corpora quadrigemina below the syl- 

 vian aqueduct. It is placed anterolaterally. N., 

 Egg-, the nucleus of the egg-cell after formation of 

 the ]>olar bodies and before union with the sperm- 

 nucleus. N., External, N., Extraventricular. 

 See Lenticula (2) (Illus. Diet.). N., Extramed- 

 ullar See A'., Auditory Accessory. N., Facial, 

 one in the reticula at the back of the pons giving 

 origin to the seventh or facial nerve. N., Fronto- 

 ventral. See JV. , Oculomotor. N. funiculi gra- 

 cilis. See A T ., Burdach's. N., Gelatinous, N. 

 gelatinoso-cartilagineus, N. gelatinosus, one 

 situated in the substantia gelatinosa of the oblongata. 

 N. germinativus. See Germinal Spot (Illus. 

 Diet.). N., Geniculate, Internal, the cinerea of 

 the postgeniculum continuous with the thalamus. 

 N. globuliformis, N. glomi. See Globulus 

 (Illus. Diet.). N., Glossopharyngeal, the glosso- 



pharyngeal portion of the accessoriovagoglossophar- 

 yngeal nucleus. N., Goll's, a small nucleus in the 

 fasciculus gracilis of the oblongata in which the long 

 fiibers of Goll's column terminate. N., Hypoglos- 

 sal, a columnar tract of large multipolar nerve"cells em- 

 bedded in the cinerea of the terete funicle in the inferior 

 triangle of the fourth ventricle and giving origin to the 

 nerve-fibers forming the rootlets of the hypoglossal 

 nerve. N. hypothalamicus, the subthalamus. N., 

 Insular, one entirely separated from adjoining masses 

 of cinerea. N. intercalatus. See A'., StaderinV s. 

 N., Intermediolateral. See Column, Jntermedio- 

 lateral. N., Intermedullary, Great, Spitzka's 

 name for the external and internal auditory 

 nuclei considered as one. N. juxtaolivaris. See 

 Olive, Accessory (1). N., Kaiser's, longitudinal 

 motor nuclei of considerable size intercalated in the 

 cervical and lumbar enlargements, between the col- 

 umna medialis and the columna intermediolateralis. 

 N., Large-celled Auditory. See A T ., Auditory 

 External. N., Lateral, that part of the comu of the 

 cord ascending in the oblongata behind the olive. 

 N., Mesencephalic (of the trigeminal % nerve), Spitz- 

 ka's name for a group of large nerve-cells in the 

 cinerea surrounding the sylvian aqueduct. The fibers 

 taking origin there join the motor root of the fifth 

 nerve. N., Mesoblastic, a nucleus of a cell belong- 

 ing to the mesoblast. N., v. Monakow's, the 

 lateral portion of Burdach's nucleus. N., Oculo- 

 motor, the nucleus of the third or oculomotor nerve ; 

 large pigmented cells embedded in the cinerea at the 

 side of the floor of the ventricular aqueduct below the 

 quadrigeniinum. N., Olivary, Accessory. See 

 Olive, Accessory. N., Olivary, Accessory External, 

 N., Olivary, Accessory Lateral, N., Olivary, Ac- 

 cessory Superior, a plate of cinerea on the dorsal 

 aspect of the olive. N., Olivary, Accessory In- 

 ternal, N., Olivary, Accessory Median Internal, 

 a ganglionic gray mass on the inner side of the olive 

 and immediately dorsad of the anterior pyramid. Syn., 

 JV. of the Pyramid ; A', pyramidalis ; Anterior olive. 

 N., Olivary, Superior, N. olivaris superior. 1. A 

 small folded gray lamina in the pons enclosed by the 

 reticula at the fore part of its lateral area. Syn., 

 Upper olive ; Nucleus of the trapezium. 2. The teg- 

 mental nucleus. N. of the Oosphere. See Pronu- 

 cleus, Female (Illus. Diet). N., Optic. See Pregeni- 

 culum (Illus. Diet.). N.,Ossific. See A*., ifowj. N., 

 Ovarian. See A'., Egg. N. of the Ovum, the fe- 

 male pronucleus. Nuclei, Peripheral. See A'., In- 

 sular. N., Perlia's. See A'., Spitzka's. N. phar- 

 yngeus. See A'., Glossopharyngeal. N., Polymor- 

 phic, a cell nucleus which assumes irregular forms. 

 Nuclei, Pontile, Nuclei pontis, scattered cinerea 

 included in the intervals in the bundles of fibers of the 

 ventral portion of the pons. Syn., Nidi pontis. N., 

 Post-pyramidal, a gray nucleus in the oblongata giv- 

 ing origin to the posterior pyramid. N., Respiratory, 

 N. of Respiration, Clarke's column. N., Ro- 

 lando's, the external cuneate nucleus. N., Roller's. 

 I. A nucleus situated near the hilum of the olivary 

 body of the oblongata ; it is connected with thej 

 fibers of the anterolateral fundamental tract of the 

 spinal cord. 2. An aggregation of small ganglion 

 cells situated anteriorly to the nucleus of the hypo- 

 glossal nerve. N., Sacral, a mass of cinerea in the 

 spinal cord at the level of the origins of the second ami 

 third spinal nerves. N. saepti pellucidi, the cinerea 

 of the sreptum lucidum, a thin lamina adjacent to A 

 cavity of the fifth ventricle. N., Sagittal, Sj it/ka's 

 name for the middle part of the oculomotor nucleus. 

 N. salivatorius, the center for salivary secretion; the 



