Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1102134 | Journal of Voice | 2013 | 6 Pages |
Abstract
This study is a morphologic description of the recurrent laryngeal nerve (RLN) and of the number and size of motor units (MUs) in the thyroarytenoid (TA) muscle bilaterally of a human fetus aged 25 weeks. A quantitative analysis of RLN and MUs is presented to investigate similarities with equivalent structures in adults. In the fetus used in our study, the morphologic organization of the RLN was similar to that commonly described in the adult RLN. Moreover, as is observed in adult TA, the TA of the analyzed fetus, particularly the right TA, showed MUs typical of muscles with great motor accuracy. These results may be used to increase our knowledge of the features of the voice in adults and newborns.
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Authors
Joel Henrique Ellwanger, João Paulo da Costa Rosa, Iuri Pereira dos Santos, Helen Tais da Rosa, Geraldo Pereira Jotz, Léder Leal Xavier, Deivis de Campos,