| 释义 |
Schwann Anat.|ʃvæn|
The name of Theodor Schwann (1810–82), German physiologist, who described the neurilema in 1839 (Mikroskop. Untersuchungen ü. d. Uebereinstimmung in d. Strukt. u. d. Wachsthum d. Thiere u. Pflanzen), used attrib., in the possessive, and with of: a. as sheath of Schwann, Schwann's sheath: = neurilema, neurilemma c.
1874A. E. J. Barker tr. Frey's Histol. & Histochem. of Man 680/1 (Index), Schwann's sheath of nerve fibre. 1882T. E. Satterthwaite Man. Histol. (ed. 2) ix. 110 A delicate membrane or envelope, the sheath of Schwann or primitive sheath. Ibid., The neurilemma, which by some is spoken of as synonymous with Schwann's sheath (Frey). 1892, etc. [see neurilema, neurilemma c]. 1898Jrnl. Compar. Neurol. VII. 183 The terminal branches of the axis cylinder are not invested with a continuation of the sheath of Schwann. 1925Elwyn & Strong Bailey's Test-bk. Histol. (ed. 7) viii. 197 (caption) Ring-like thickening of Schwann's sheath at node of Ranvier. 1972Matzke & Foltz Synopsis of Neuroanat. (ed. 2) ii. 11 The axon may have one or two coverings: myelin and sheath of Schwann.
b. to designate the cells which enwrap the axons of peripheral nerve fibres and form the myelin sheath (when it is present); formerly, the parts of these cells containing the nucleus and cytoplasm.
1904Amer. Jrnl. Anat. III. 261 [He] referred to them as ‘nerve corpuscles’ and ‘half-moon cells’, and they have since been called ‘Schwann's corpuscles’ from their relation to the sheath of Schwann and their supposed identity with the nucleus of that sheath in the adult peripheral nerve. 1906Ibid. V. 121 If one examines a developing nerve, one sees that there are numerous spindle shaped cells (cells of Schwann, sheath cells) throughout its course. 1931W. Bloom Maximow's Text-bk. Histol. xii. 254 The nuclei of the Schwann cells usually are flattened and oval. 1960G. Causey Cell of Schwann i. 5 The differentiation between Schwann membrane and Schwann cell that has been made by many histologists since 1839 is not a distinction that existed in Schwann's original description. Ibid. iv. 45 The term Schwann cell will be now used for any cell that enfolds a nerve fibre within its cytoplasm, whether..in the somatic or visceral parts of the peripheral nervous system. 1966, etc. [see neurilema, neurilemma c]. 1967Matzke & Foltz Synopsis of Neuroanat. ii. 11 The Schwann cell contains a scanty amount of cytoplasm but a prominent nucleus. 1976Path. Ann. XI. 355 Studies of regenerating nerve provided morphologic data suggesting that Schwann cells are capable of manufacturing fibrillar collagen. |