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Ceratocricoid muscle: An embryological and anatomical study

Lookup NU author(s): Professor Stephen McHanwell

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Abstract

This study aimed to document the prevalence and morphology of the ceratocricoid muscle in a large sample of fetuses and adults and to explain its possible origin in a sample of embryos. Forty-five embryos, thirty-four fetuses, and ninety human larynges from adults with no known laryngeal pathology were studied. The muscle was observed in 23% of the fetal sample and in 14% of the adult sample. No significant differences were observed in the laterality in any of the groups. The ceratocricoid muscle is attached between the cricoid lamina and the inferior horn of the thyroid cartilage and also into the capsule of the cricothyroid joint. The muscle is innervated by several branches (between one and three) from the anterior division of the recurrent laryngeal nerve as it courses behind the cricothyroid joint. The ceratocricoid muscle develops from tissue within the mesenchymal bridge which connects the external and internal laryngeal sphincters or rings from embryonic stages 15-20. The close relationship of the ceratocricoid muscle to the recurrent laryngeal nerve could mean that it can exert pressure on this nerve. This may be a possible explanation for the causation of certain idiopathic recurrent laryngeal nerve palsies. Clin. Anat. 22:463-470, 2009. © 2009 Wiley-Liss, Inc.


Publication metadata

Author(s): Maranillo E, Vázquez T, Mirapeix R, León X, McHanwell S, Quer M, Ramón Sanudo J

Publication type: Article

Publication status: Published

Journal: Clinical Anatomy

Year: 2009

Volume: 22

Issue: 4

Pages: 463-470

ISSN (print): 0897-3806

ISSN (electronic): 1098-2353

Publisher: John Wiley & Sons, Inc.

URL: http://dx.doi.org/10.1002/ca.20795

DOI: 10.1002/ca.20795

PubMed id: 19306315


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