NERVED 



847 



NESTIATRIA 



id of the triceps. N.-less, without a nerve. N.- 

 Ice, resembling a nerve. N.-loop, an arched con- 

 ection between two or more nerves. N. -medulla, 

 axis-cylinder of a nerve. N., Medullated. See 

 '.-fiber. N. -mimicry. Same as Neuromimesis. N., 

 lixed, one made up of both afferent and efferent 

 ers. N. -motion, the condition of excitement of 

 erves in the normal, intact body, due to physiologic 

 normal stimulus; its nature is unknown. N., 

 lotor, one containing only or chiefly motor fibers. 

 .-needle, in dentistry, an instrument used for broach- 

 out a pulp-cavity. N., Non-medullated. See 

 '.fiber. N. -paste, a preparation for destroying the 

 rves of teeth, for the composition of which dif- 

 rent formulae are given. Some are composed of 

 senious acid and creasote, others of arsenious acid, 

 easote, and sulphate of morphin. N.-path, the 

 iurse pursued by a nervous impulse. N. -plate, 

 layer of nervous tissue, which may develop into 

 nerve-tube or nerve-cord. N. -plexus, a grouping 

 ' nerves. N. -power, the nervous energy of the body. 

 Pressor, an afferent nerve, irritation of which 

 timulates the vaso-motor center. N.-ring, the ring 

 nerve-fibers surrounding a hair-follicle below 

 orifice of the sebaceous glands. N.-root: I. 

 2 root of a nerve ; the nerve or one of its con- 

 tituent parts, as it emerges from a central organ. 2. 

 plant Cypripedium pitbescens. N. -rudiment, 

 le rudiment of a nerve. N., Secretory, an efferent 

 erve, stimulation of which causes increased activity 

 ' the gland to which it is distributed. N. -section, 

 division of a nerve for the relief of neuralgia, 

 -shaken, having the nervous system shattered. N., 

 sinal, one of those arising from the spinal cord and 

 "ting its exit through an intervertebral foramen, 

 iere are 31 pairs of spinal nerves. N. -storm, a 

 iidden outburst or paroxysm of neurotic disturbance. 

 N. -stretching, mechanical elongation or tension of a 

 nerve, for neuralgia, spasmodic contraction, and other 

 i pathologic conditions. N. -substance, the substance 

 1 of a nerve-cell. N., Sympathetic, one of a sys- 

 i tern of nerves distributed chiefly to the blood-vessels 

 | and to the viscera. They are so-called because they 

 were thought to establish a communication or sym- 

 pathy between distant organs of the body, especially 

 in diseased states. See Sympathetic. N., Thermic. 

 A synonym of A r ., Calorific. N.-tire, neurasthenia. 

 N. -tissue, the intrinsic substance of a nerve or nerve- 

 i fiber. N. -track, same as N.-path. N., Trophic, a 

 nerve, the function of which is to preside over the 

 nutrition of the part to which it is distributed. N.- 

 trunk, the main division or stem of a nerve. N.-tube, 

 a nerve-fiber ; also a hollow cord of embryonic nervous 

 tissue. N. -tuft, a minute plexus of nerve-fibers. N.- 

 tumor. See Neuroma and Tumors, Table of. N.- 

 tunic, an investiture by nervous tissue. N.-twig, a 

 minute ramification of a nerve. N., Ulnar Collateral. 

 See N., Krauses. N., Vaso-constrictor. See 

 N.. Vaso-motor. N., Vaso-dilator. See N., Vaso- 

 motor. N., Vaso-hypertonic. A synonym of A'., 

 -constrictor. N.,Vaso-inhibitory. A synonym 

 of A", Vaso-dilator. N., Vaso-motor; vasomotor 

 nerves are of two kinds — those, stimulation of which 

 causes contraction of the vessels, vaso-constrictor 

 n f rves .' anc * those, stimulation of which causes active 

 dilatation, vaso-dilator nerves. Ordinarily vaso-motor 

 B -ynonymous with vaso-constrictor. N.-wave, a 

 wave-motion in a nerve. 

 Nerved {nervd) [nervus, a fiber]. Having nerves ; 



nervose; innervated. 

 Nervelessness (>i en '-les-nes) [nervus, a nerve]. Lack 

 of vigor ; a nerveless state. 



Nervi (ner'-vi) [L.]. Plural of Nervus, a nerve. 

 Nerves. N. nervorum, a term applied to the small 

 nerves distributed to the nerve-sheaths. 



Nerviduct (tier' -vid-ukt) [nervus, nerve ; ductus, duct] . 

 The channel by which a nerve passes through a bone. 



Nerville (ner(-viT) [nervillus, dim. of nervus, nerve]. 

 In biology, a very fine nerve in the blade of a leaf. 



Nervimotion [tier' ' -vim-o-shun) [nervus, a nerve ; 

 motio, motion]. In biology, the reflex action of the 

 nervous system, or the power of self-motion, as in 

 leaves. 



Nervimotor (tier* ' -vim-o-tor) [nervus, a nerve ; motor, 

 a mover]. I. Pertaining to or causing nervimotion. 

 2. That which causes nervimotion. 



Nervine (iier'-vin) [nervus, nerve]. I. Pertaining to 

 the nerves. 2. Acting favorably, or decidedly, upon 

 the nerves. 3. A remedy that calms nervous excite- 

 ment or acts favorably on nervous diseases. 4. The 

 plant Cypripedhim pitbescens. 



Nervose (ner'-voz) [nervosus, full of fibers]. Nerved; 

 conspicuously nerved. 



Nervosism (ner'-vo-sizm) [Fr. nervosisme ; nervus, a 

 nerve]. 1. Neurasthenia or nervousness. 2. The 

 doctrine that all morbid phenomena are caused by al- 

 terations of nerve-force. 



Nervous [iier'-vus) [neitus, a nerve]. Pertaining to 

 nerves. Applied to conditions of hyperesthesia and 

 neurasthenia. N. Bladder. See Bladder. N. Break- 

 down. See Neurasthenia. N. Cough, an hysteric 

 disturbance of the motor functions of the larynx, mani- 

 festing itself as an almost constant cough, unassociated 

 with disease of the laryngeal mucosa. N. Fluid, 

 a hypothetic fluid supposed to traverse the nerves from 

 the nerve-centers to the periphery. N. Impulse, the 

 impulse propagated along a stimulated nerve. N. In- 

 fluence. Same as Nkroe-power. N. Irritability, a 

 morbid condition of excitability of the nervous system. 

 N. Quinsy. A synonym of Globus hystericus. N. 

 Shock, a functional disturbance of the central nervous 

 system, following fright or other violent emotion. N. 

 System. See Cerebrospinal. N. Temperament. 

 See Temperament. N. Vomiting, a condition not 

 associated with anatomic changes in the stomach or 

 with any morbid state of its contents, but due to ner- 

 vous influences acting either directly or indirectly upon 

 the centers presiding over the act of vomiting. It 

 usually occurs in brunet women, and is, as a rule, not 

 of much gravity, although death has occurred. 



Nervousness (ner'-vus-nes) [nerz-us, nerve]. A con- 

 dition of over-excitability of the nervous system, char- 

 acterized by great unrest, mental and physical. 



Nervule, Nervulet (ner'-vill, ner'-vu-le£) [dim. of 

 nervus, nerve]. A small nerve. 



Nervulose (ner'-vu-loz) [nervulus, dim. of nervus, a 

 nerve]. In biology, minutely nervose. 



Nervure (ner'-vur) [nervus, a sinew]. In biology, 

 one of the veins or nerves of a leaf or an insect's 

 wing. 



Nesis [ne'-sis] [vf/cic, suture]. Suture. 



Nessler's Reagent and Test. A solution of potas- 

 sium iodid, mercuric chlorid, and sodium hydroxid, 

 used in estimating the amount of ammonia in water. 

 See Tests, Table of. 



Nesslerizing (nes' -ler-i -zing) [after Nessler, a chemist]. 

 The process of using Nessler's reagent. 



Nest [ME., nest, a nest]. The home of a bird; the 

 place where its eggs are laid. N.-cell, an aggrega- 

 tion or cluster of cells, as in carcinoma. 



Nesteia (nes-ti'-ah) [vr/areia, fasting]. I. Fasting. 

 2. The jejunum. 



Nestiatria (nes-te-a'-tre-ah) [iv/orela, a fast; 'larpeia, 

 treatment]. Hunger-cure ; treatment by fasting. 



