{"title":"The levator ani of the female rat: a suitable model for studying the effects of testosterone on the development of mammalian muscles.","authors":"C Tobin, Y Joubert","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>The present results give evidence by using cytochemical markers of motor end-plates (ChE, AchR) and ultrastructural techniques that the Levator ani (LA) muscle is also present in adult females: it is composed of differentiated and innervated fibres. A significant difference, both on the number of fibres per muscle (n) and on their average cross-sectional area (acsa), was observed between sexes:-male: n = 5300 +/- 687, acsa: 522 +/- 68.6 microns 2;-female: n = 565 +/- 246.9, acsa: 68 +/- 8.6 microns 2. These results suggest that testosterone could control, at least partially, the number and the diameter of muscle fibres during development.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"1 1","pages":"28-33"},"PeriodicalIF":0.0000,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biological structures and morphogenesis","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The present results give evidence by using cytochemical markers of motor end-plates (ChE, AchR) and ultrastructural techniques that the Levator ani (LA) muscle is also present in adult females: it is composed of differentiated and innervated fibres. A significant difference, both on the number of fibres per muscle (n) and on their average cross-sectional area (acsa), was observed between sexes:-male: n = 5300 +/- 687, acsa: 522 +/- 68.6 microns 2;-female: n = 565 +/- 246.9, acsa: 68 +/- 8.6 microns 2. These results suggest that testosterone could control, at least partially, the number and the diameter of muscle fibres during development.
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