NEUROARTHRITISM 



379 



NEUROSARCOMA 



whole nerve into a sclerotic cord. F., Radicular, 

 that in which the nerve-roots rather than the plexus 

 are the seats of inflammation. N., Segmental, N., 

 Segmentary, that affecting a segment of a nerve. 

 N., Toxemic, that due to some unknown poison or 

 virus in the blood. N., Toxic, that due to the presence 

 in the blood of some known substance, as lead, silver, 

 arsenic. N., Tuberculous, polyneuritis due to the 

 specific action on the nerves of a poison produced by 

 the tubercle bacilli. 



Neuroarthntism {nu-ro-ar'-thrit-izm). A combined 

 nervous and gouty diathesis. 



Neurochitin (nu-ro-ki'-tin) [vevpam, nerve; chitin\. 

 The substance forming the skeletal support of nerve- 

 fibers. 



Neurochorioretinitis (nu- ro-ko-re-o- ret- in-i' -tis ). 

 Chorioretinitis combined with optic neuritis. 



Neurochoroiditis {nu-ro-ko-roid-i' -tis). Combined in- 

 flammation of the choroid body and optic nerve. 



Neurocyte. (See Illus. Diet.) 3. Fish's name for 

 neuron. 



Neurodendrite {nu-ro-den' '-dr'it) [vevpov, a nerve; 

 devopov, a tree]. A dendritic and protoplasmic exten- 

 sion or process of a nerve-cell, a combined neuron and 

 dendron. 



Neurodendron {nu-ro-den' -dron) [yevpov, nerve ; Sev- 

 dpov, tree]. I. Kolliker' s name for the neuron or neuro- 

 cyte. 2. See Neurodendrite. 



Neurodermatitis (nu-ro-dur-mal-i'-tis). Dermatitis 

 of neuropathic origin. 



Neurodermitis (nu-ro-dur-mi' '-tis). See Acroderma- 

 titis. 



Neurodin (nu'-ro-din) [vevpov, nerve; bivvy, pain]. 

 Cj,H n N0 4 . Acetylparaoxyphenylurethane. A deri- 

 vative of amidophenol and ethylurethane. It occurs 

 in colorless, inodorous crystals, slightly soluble in 

 water; melts at 87 C. ; antineuralgic and antipyretic. 

 Dose, antineuralgic, 15-24 gr. ( I— 1.5 gm.); as anu- 

 pyretic, 5-10 gr. (0.32-0.65 gm. ). 



Neurodynamis {nu-ro-di-na' -mis). See Neurodynamia 

 (Illus. Diet.). 



Neuroelectrotherapeutics (nu-ro-e-lek-tro-ther-a-pu'- 

 tiks). The treatment of nervous affections by elec- 

 tricity. 



Neuroepidermal {nu-ro-ep-e-dur 1 '-mal). Relating to 

 the nerves and the skin. 



Neuroepithelioma (nu-ro-ep-e-lAe-le-o / -ma) [yet/fun; a 

 nerve ; bri, upon ; Vrj'/.q, a nipple]. A glioma of the 

 retina. N. retinae, a term proposed by Flexrier and 

 Wintersteiner to replace glioma retinae. 



Neurofibril [nu-ro-Ji'-bril). A conducting fibril of a 

 nerve-cell. 



Neurofibromatosis {nu-ro fi-bro-mct-o' -sis) [yevpov, 

 nerve ; fiber, fiber] . A disease characterized by the 

 formation of numerous great and small tumefactions of 

 the nerves ; described by Recklinghausen. 



Neurofil {nu'-ro-fil) [yevpov, nerve \filum, thread]. A 

 network of protoplasmic processes arising from the com- 

 mencement of the axis-cylinder and surrounding the cell. 



Neuroganglion {nu-ro-gang 1 -gle-on). See Ganglion 

 (1) (Illus. Diet.). 



Neurogastric (nu-ro-gas f -trik). Relating to the nerves 

 and the stomach. 



Neurogenetic [nu-ro-jen-et'-ik). Relating to neuro- 

 genesis. 



Neurogenous {nu-roj'-en-us). Originating in the 

 nervous system. 



Neurogeny (nu-roj'-en-e). See Neurogenesis (Illus. 

 Diet.). 



Neurokinet {nu-ro-kin'-et) [yevpov, nerve; Kivetv, to 

 move]. An apparatus devised by v. Cxkiill for stimu- 

 lating the nerves by means of mechanical percussion. 



Neurolysin (nu-ro/ / -is-in) [in -or, nerve; /.ten-, to 

 loose]. A cytolysin having specific action upon nerve- 

 cells. 



Neuromast. (See Illus. Diet.) 2. A motorial end- 

 plate. 



Neuromyology {nuro-mi-ol'-o-je) [yevpov, nerve ; uic, 

 muscle; so^oc, science]. The classification of muscles 

 with regard to their innervation. 



Neuromyositis {nu-ro- mi- o-si f -tis) [yevpov, nerve ; 

 uic, muscle]. Combined neuritis and myosins; it is 

 usually confined to a single limb, generally the arm. 



Neuron. (See Illus. Diet.) 3. A nerve-cell including 

 all of its appendages. 4. In arthropods the nervous 

 portion of the eye. 5. Used by the ancients indiffer- 

 ently for nerves, tendons, ligaments, and membranes. 

 N. Doctrine, that proposed by Waldeyer (1891). 

 According to Bell, the neuron concept of the nervi us 

 system may be briefly stated as follows : " The nervous 

 system, aside from its neuroglia, ependymal cells, 

 bloodvessels, and lymphatics, consists of an enormous 

 number of individual elements or neurons, each neuron 

 in its entirety representing a single body or cell. The 

 foundation for the neuron doctrine rests upon the follow- 

 ing facts : ( 1 ) That the nervous system agrees with 

 other parts of the body in being cellular; (2) the 

 proof that in the embryo the nerve-cells exist as inde- 

 pendent units, many of which are capable of wandering 

 for a considerable distance from the origin; (3) the 

 fact that the nutrition of the nerve-cells is most easily 

 explained from the standpoint of a doctrine which looks 

 upon the nervous system as made up of units, which 

 are not only anatomic but physiologic. N., Edinger's 

 Law Concerning, a regular and gradual increase of 

 function of a neuron leads at first to increased growth ; 

 but if carried to excess, and especially if irregular and 

 spasmodic, it results in atrophy and degeneration, and 

 ultimately in proliferation of the surrounding tissue. 

 N., Goldscheider-Marinesco's Law Concerning, 

 the fewer connections a neuron has, and, consequently, 

 the fewer stimuli it receives, the less is its tendency to 

 degeneration. See also law, Aliiller s (2). N.- 

 threshold, the degree of excitation of a neuron which 

 just suffices to produce a sensation in another with 

 which it is in contact. 



Neuronagenesis (nu-ron-ah-jen'-e-sis) [vevpov, nerve; 

 a, priv. ; yeviav, to produce]. Failure of the develop- 

 ment of neurons. Cf. Xeuranagenesis (Illus. Diet.). 



Neuronal, Neuronic [nu'-ron-al, nu-ron'-ik). Relat- 

 ing to a neuron. 



Neuronephric {nu-ro-nef'-rik) [vevpov, a nerve ; ve0poc, 

 the kidney]. Pertaining to the nervous and renal 

 systems. 



Neuronephrioblast {nu-ro-nrf'-re-o-blast) [vevpov, 

 nerve ; vtopoc, kidney ; .?> aaroc, a germ] . In some 

 invertebrates, cells giving origin to the central nervous 

 system and the renal organs. 



Neuronymy {nuren'-im-e) [yevpov, nerve; bwfia, a 

 name]. Neurologic nomenclature. 



Neurooccipital {nu-ro-ok-sip , -it <//). Relating to a 

 neural arch and the occiput. 



Neurophlegmon {nu-ro-Jleg'-mon) [yevpov, nerve; 

 o/.e ; u<ivr; t inflammation]. Neuritis. 



Neuropilem, Neuropilema(««-r0-/» y -Z«», -pi-U'-viah\ 

 [vevpov, nerve; ~i'/.oc, felt]. His' term for the dense 

 mat of fibrils formed in some parts by the branching 

 nerve-processes. Syn., A~en>e-felt. 



Neuroplex, Neuroplexus (nu'ro pleks, nu-ro-pleks' '- 

 us). A plexus of nerves. 



Neuropodium. (See Illus. Diet. 1 ) In the pi., Neu- 

 ropodia, Kolliker' s name for dendraxons. 



Neurosarcoma {nu-ro-sar-ko / -mah). A combined 

 neuroma and sarcoma. 



