NEURAXIS 



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NEURITIS 



Neuraxis (nu-raks' '-is) [vevpov, nerve ; axis, axis]. 

 The neural axis ; neuron. 



Neure (nur) [vevpov, nerve]. A nerve-cell including 

 all its processes. 



Neurectasis, Neurectasy (nu-rek f -tas-is, nu-rek f - 

 tas-e) [veiipov, nerve ; ektclgiq, stretching]. Nerve- 

 stretching. 



Neurectomy (tiu-rek' '-to-me) [vevpov, nerve ; ektojij], 

 excision]. The operation of excising part of a 

 nerve. 



Neurectopia {nu-rek-to' -pe-ah) [vevpov, nerve ; eKTOirog, 

 out of place]. Displacement, or other abnormity of 

 the distribution of a nerve. 



Neuremia (iiu-re' -me-ak) [vevpov, nerve ; alfia, blood]. 

 A purely functional nervous disorder. 



Neurempodism [nu-rem' '-po-dizm) [vevpov, nerve; 

 EfnrodiGfiog , hindrance]. Interference with nervous 

 action. 



Neurenteric [nu-ren-ter' '-Hi) [vevpov, nerve ; evrepov, 

 intestine]. Pertaining to the embryonic neural canal 

 and the intestinal tube. N. Canal, the temporary 

 communication existing between the neural canal and 

 the intestinal tube in Tunicates and Vertebrates. It 

 was discovered by Kowalevsky in Ascidians and Am- 

 phioxus, and is called also Kowalevsky 1 s Canal. See 

 Canal. 



Neurepithelium (nu-rcp-ith-e'-ieum). See Neuro- 

 epitheliwn. 



Neuria (iiu'-re-ali) [vevpov, nerve]. "Nervous tissue; 

 a delicate layer of nerve-substance. 



Neuriasis {nu-ri* -as-is) [vevpov, nerve]. Hysteric 

 hypochondriasis. 



Neuriatry (nu-ri'-at-re) [vevpov, nerve ; larpeia, ther- 

 apy]. The study and treatment of nervous diseases. 



Neuric [nu'-rik) [vevpov nerve]. Pertaining to a 

 nerve or to nerves. 



Neuricity [iiu-ris' -it-e) [Fr. , neuricile, from vevpov, 

 nerve]. Nerve-force ; nervous quality, or function. 



Neuridin [iiu f -rid-in) [vevpov, a nerve], C 5 H U N. 2 . A 

 ptomain, the first diamin isolated from animal tissues 

 by Brieger in 1884. It is one of the most common 

 products of putrefaction ; it has been obtained from 

 putrid human flesh, horseflesh, fish, gelatin and cheese. 

 It can be obtained in the preparation of cholin by 

 • heating fresh eggs with baryta, and by heating fresh 

 brain with a two per cent, solution of hydrochloric 

 acid. It is almost invariably associated with cholin 

 in the process of putrefaction ; according to the dura- 

 tion of putrefaction, the amount of cholin decreases, 

 with a corresponding increase in the amount of tri- 

 methylamin, while the amount of neuridin increases in 

 quantity according to the nature of the decomposing 

 organ. The greatest yield is from gelatinous tissue, 

 such as the intestines ; tissues like those of the liver and 

 spleen yield little. Neuridin is isomeric with cadaverin. 

 The free base has an excessively repulsive seminal 

 odor. It is soluble in water, but not in ether and alco- 

 hol. Pure neuridin is not poisonous, but when mixed 

 with the products of putrefaction, it has a toxic effect 

 like peptotoxin. This holds true of other non-poison- 

 ous bases. See Plantains, Table of 



Neurilemma (nu-ril-eur'-ah) [vevpov, nerve ; ?Jppn, 

 bark]. The sheath encasing a nerve-fiber; the 

 sheath of Schwann. See Nenie-fiber. 



Neurilemmatic {nu-ril-em-at'-ik) [vevpov, nerve 

 Ai/z/m, bark]. Pertaining to the neurilemma. 



Neurilemmitis {nu-ril-em-i'-tis) [vevpov, nerve; Mpfia 

 bark ; itiq, inflammation]. Inflammation of the neuri 

 lemma. 



Neurility (nu-ril f -it-e) £Fr. nevriliti, from vevpov 

 nerve]. The stimulus or power possessed by a nerve 

 fiber to cause contraction of a muscle ; neuricity. 



Neurilyma (tiu-ril-i'-mah). Synonym of Neurilemma. 



Neurin (itu'-rin) [vevpov, nerve]. I. The albuminous 

 basis forming the substance of nerve-tissue. 2. C- 

 H 13 NO ; a toxic body, one of the ptomains, the pro- 

 duct of decomposition of protagon by caustic baryta. 

 It is a syrupy fluid, with a strongly alkaline reaction, 

 and is extremely soluble in water. See Ptomains, 

 Table of. 3. An extract of nerve-tissue employed 

 therapeutically. See Organotherapy . 



Neuriorhabdium inu-re-or-ab'-de-um) [vevpiov, nerve; 

 pd[36iov, rod ; pi. Neuriorhabdia~\. Any one of the 

 rods of the rod-and-cone layer of the retina. 



Neurischias {nu-ris' -ke-as) [vevpov, nerve ; u 

 pain in the loins]. Neuralgia in the loins. 



Neurism (nu'-rizm) [vevpov, nerve]. 1. Nerve-force; 

 neurility; neuricity. 2. Nervousness. 



Neuristos [nu-ris' -tos) [vevpov, nerve; 'lot6c tissue]. 

 Nerve-tissue. 



Neuritic [tiu-rit 1 '-ik) [vevpov nerve ; itiq, inflammation]. 

 Pertaining to neuritis. 



Neuritides (nu-rit-i' '-dez) . Same as Netiroses. 



Neuritis [iiu-ri' -tis) [vevpov, nerve ; trie, inflammation]. 

 Inflammation of a nerve, especially of a nerve-trunk. 

 The nerve-structure itself is said to be little subject to 

 inflammation, which is usually confined to the cover- 

 ings, and therefore the condition is more properly 

 termed perineuritis. N., Acute, an acute inflammation 

 of a nerve. N., Adventitial, inflammation aff 

 especially the connective-tissue sheath of a nerve. N., 

 Alcoholic. See jV., Multiple, and Polyneuritis pota- 

 torum. N., Ascending, inflammation extending from 

 the periphery of a nerve centrad to the spinal cord or 

 brain. N., Carcinomatous, infiltration of a nerve 

 with carcinomatous tissue. N., Chronic, a form pur- 

 suing a protracted course, and with .symptoms n.it 

 actively manifested. N., Degenerative, neuritis in 

 which the nerve-substance proper degenerates. It is 

 the same as N, Parenchymatous. N., Descend- 

 ing, neuritis, the result of extension of disease from 

 the spinal cord or the brain toward the periphery. N., 

 Diabetic, a polyneuritis sometimes seen in di;i 

 and probably the result of autointoxication with the 

 products of faulty metabolism. N., EichhorstV 

 N.fascians. N., Endemic. A synonym of Beri-beri. 

 N. fascians, that form of neuritis in which the 

 change in the nerve-sheath appears to extend directly 

 to the interstitial tissue of the muscles. It is also I 

 called Eichhorsfs A r euritis. N., Interstitial, in- 1 

 flammation of the interstitial connective tissue of a 

 nerve-trunk. N., Leprous, a neuritis or perin 

 due to the Bacillus lepra; or a toxin produced by it. N.. 

 Lipomatous, that form in which the nerve-libers are i 

 completely destroyed and replaced by a fibrous 

 nective tissue in which much fat is sometimes 1 

 ited. It is also called Leyden 1 s Neuritis. N.. 

 Malarial, neuritis, sometimes multiple, due to the 

 rial poison. N., Migrant, Migratory or Wandering, 

 one that changes its position from place to place. N.. 

 Multiple, the simultaneous inflammation of si 

 nerve-trunks, usually symmetrically situated on Ma 

 sides of the body. Its most common cause is alcobsUC 

 poisoning ; it maybe due to arsenic, malaria, mercury, 

 lead; to diphtheria, pneumonia, typhoid fever, 

 other infectious diseases. Beriberi is a form oi mul 

 tiple neuritis. N., Optic, inflammation ol t 

 optic nerve. See Papillitis. N., Parenchymatous, 

 a form in which the medullary substance and tli 

 cylinders are chiefly involved, the interstitial I 

 being but little altered or only affected secondwl 

 It is also called degenerative neuritis. N., P er ' 

 ipheral, a form confined to the terminal filaments a 

 nerves. N., Pressure, inflammation of a ner\ 



