蘭氏結

蘭氏結
Drawing of a peripheral nerve axon (labeled "axis cylinder"), showing a node of Ranvier along with other features
光學顯微鏡下的蘭氏結
基本資訊
系統	神經系統
位置	Myelinated axon of a nerve
標識字符
拉丁文	incisura myelini
MeSH	D011901
TH	H2.00.06.2.03015
《顯微解剖學術語》

蘭氏結（英語：Nodes of Ranvier）又名郎氏結，郎飛氏結。是神經元的一部分，以首位描述該結構的法國科學家路易斯·安托萬·蘭維爾為名。

神經元的髓鞘包覆著軸突，蘭氏結是神經元上每隔數毫米就會出現的沒有髓鞘的部分。

跳躍傳導學說認為，因為在蘭氏結之間的結間區的電阻極高，而在結區的電阻極低，並且軸突膜僅在結區可接觸細胞外液，所以，局部電流必須在蘭氏結處穿出膜在髓鞘處形成迴路，進行跳躍式傳導。

蝦的內側大纖維沒有蘭氏結。

概論

神經細胞
樹突 細胞體 軸突 細胞核 蘭氏結 突觸 許旺細胞 髓鞘
典型神經元的結構

附加圖片

• 
  神經元細胞結構示意圖
• 
  Medullated nerve fibers stained with silver nitrate

參見

• 結間段（節間段、結間體）
• 施旺細胞
• 少突神經膠質細胞（少突膠質細胞、寡突膠細胞、寡突細胞、少突細胞、稀少突起阿膠細胞、稀突起膠細胞）
• 髓磷脂

參考文獻

• Baumann, Nicole; Pham-Dinh, Danielle. Biology of Oligodendrocyte and Myelin in the Mammalian Central Nervous System. Physiological Reviews. 2001, 81 (2): 871–927 [2007-07-13]. PMID 11274346. （原始內容存檔於2007-05-26）. 
• Ragheb, Fadi. The M3 Muscarinic Acetylcholine Receptor Mediates p42^mapk Activation and c-fos mRNA Expression in Oligodendrocyte Progenitors (PDF). Ottawa: National Library of Canada. 1999 [2006-03-07]. （原始內容存檔 (PDF)於2006-05-16）. 
• Raine, C.S. (1991). Oligodendrocytes and central nervous system myelin. In Textbook of Neuropathology, second edition, R.L. Davis and D.M. Robertson, eds. (Baltimore, Maryland: Williams and Wilkins), pp. 115–141.
• Tkachev D, Mimmack ML, Ryan MM, et al. Oligodendrocyte dysfunction in schizophrenia and bipolar disorder. Lancet. September 2003, 362 (9386): 798–805. PMID 13678875. doi:10.1016/S0140-6736(03)14289-4. 
• Káradóttir, R.; D. Attwell. Neurotransmiter receptors in the life and death of oligodendrocytes. Neuroscience. 14 April 2007, 145 (4): 1426–1438. PMC 2173944 . PMID 17049173. doi:10.1016/j.neuroscience.2006.08.070. 
• Carlson, Neil. Physiology of Behavior. Boston, MA: Allyn & Bacon. 2010: 38–39. ISBN 0-205-66627-2. 
• Sokol, Stacey. The Physiology and Pathophysiology of Multiple Sclerosis. Multiple Sclerosis: Physiological Tutorial. [2012-04-29]. （原始內容存檔於2012-07-16）. 
• Fields, Douglas. White Matter Matters. Scientific American. 18 February 2008, 298 (March 2008): 54–61 [2012-04-29]. Bibcode:2008SciAm.298c..54D. doi:10.1038/scientificamerican0308-54. （原始內容存檔於2013-11-01）. 
• Menn, Benedicte; Oscar Gonzalez-Perez. Origin of Oligodendrocytes in the Subventricular Zone of the Adult Brain. The Journal of Neuroscience. 26 July 2006, 26 (30): 7907–7918 [2012-04-29]. PMID 16870736. doi:10.1523/JNEUROSCI.1299-06.2006. （原始內容存檔於2019-12-07）. 
• Gonzalez-Perez, O, B; Romero-Rodriguez, R; Soriano-Navarro, M; Garcia-Verdugo, JM; Alvarez-Buylla, A. Epidermal growth factor induces the progeny of subventricular zone type B cells to migrate and differentiate into oligodendrocytes.. Stem Cells. 2009, 27 (8): 2032–43. PMC 3346259 . PMID 19544429. doi:10.1002/stem.119. 
• Vallstedt, A; Klos JM; Ericson F. Multiple dorsoventral origins of oligodendrocyte generation in the spinal cord and hindbrain. Neuron. 1. 6 January 2005, 45 (1): 55–67. PMID 15629702. doi:10.1016/j.neuron.2004.12.026. 
• Thomas, JL; Spassky N; Perez Villegas EM; Olivier C; Cobos I; Goujet-Zalc C; Martínez S; Zalc B. Spatiotemporal development of oligodendrocytes in the embryonic brain. Journal of Neuroscience Research. 15 February 2000, 59 (4): 471–476. PMID 10679785. doi:10.1002/(SICI)1097-4547(20000215)59:4<471::AID-JNR1>3.0.CO;2-3. 
• Richardson, WD; Kessaris, N; Pringle, N. Oligodendrocyte wars. Nature Reviews Neuroscience. 1. 2006, 7 (1): 11–18. PMID 16371946. doi:10.1038/nrn1826. 

外部連結

• Cell Centered Database – Node of Ranvier （頁面存檔備份，存於網際網路檔案館）
• Organology at UC Davis nervous/pns/nerve2/nerve5 – "PNS, nerve (LM, Medium)"