paraganglionn.
/ˌparəˈɡaŋɡlɪən/, U.S. /ˌpɛrəˈɡæŋɡliˌɑn/ Anatomy.
Any of the small aggregates of chromaffin cells found in association with autonomic ganglia and nerves. Also: any of the small collections of glomus cells found in association with certain blood vessels, acting as chemoreceptors.
ΘΚΠ
the world > life > biology > substance > cell > [noun] > mass or group of
polyblast1873
tetrad1876
triad1876
tetrad-deme1883
stem-line1892
paraganglion1907
polyclone1975
the world > life > the body > nervous system > substance of nervous system > [noun] > nerve cell > groups of
touch body1853
touch corpuscle1856
nerve centre1870
paraganglion1907
1907 Med. Rec. (N.Y.) 3 Aug. 188/2 These occur in the medullary substance of the adrenal bodies, in the so-called paraganglia of the same organs.
1915 A. P. Mathews Physiol. Chem. 664 One large mass [of chromaffine tissue] in particular is called Zuckerkandl's paraganglion.
1937 Contrib. Embryol. 26 17 A study of the development of the carotid body..has left me unconvinced that it can be regarded as a paraganglion in the strict sense of the term. A priori..the term paraganglion means a structure of which the essential cells are derived in their entirety from the nervous system.
1940 Q. Rev. Biol. 15 167/2 Recently..a distinction has been made between chromaffin and non-chromaffin paraganglia.
1962 E. C. Crosby et al. Correl. Anat. Nerv. Syst. viii. 545/1 Small collections of cells found in relation with certain blood vessels constitute the carotid body, the aortic bodies, the jugular body..and the coccygeal body... Although sometimes referred to as paraganglia, as the term is used in its wider sense, these cell masses usually contain no chromaffin cells and are unlike the chromaffin bodies in other ways as well.
1965 J. Lee & F. Knowles Animal Hormones iv. 85 In mammals additional chromaffin tissue may be found in the lower part of the abdominal aorta (para-aortic glands), or in contact with sympathetic ganglia (paraganglia).
1986 A. S. Romer & T. S. Parsons Vertebr. Body (ed. 6) xvii. 612 They are often and appropriately termed paraganglia because they are embryologically identical with the sympathetic ganglia, which they may adjoin.
2004 Respiratory Physiol. & Neurobiol. 141 137 Paraganglia resembling the carotid body have been described in the superior laryngeal nerve (SLN) of the rat.
Derivatives
paragangliˈonic adj.
ΘΚΠ
the world > life > the body > nervous system > substance of nervous system > [adjective] > nerve cell > groups of
paraganglionic1937
1937 Contrib. Embryol. 26 27 (caption) Reconstruction of the branchial-arch arteries in a 26-mm. human embryo to show positions in which ‘paraganglionic’ tissue can be found.
1959 W. Andrew Textbk. Compar. Histol. xiii. 530 No true carotid body is present in fishes, amphibians, and reptiles. It is only in birds and mammals that the paraganglionic cells in this region form an organ.
1995 European Urol. 27 264/1 The paraganglionic mass posterior to the right renal pedicle was resected.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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n.1907