open access
Cross-over type of supernumerary digastric muscle
open access
Abstract
A cross-over type asymmetric anomaly of the anterior belly of the right digastric muscle was observed during a cadaveric dissection of the submental region. Three irregularly-shaped supernumerary muscle bundles were found between the anterior bellies of the digastric muscles. Although the anomalies of the digastric muscles are often observed, this complicated pattern has not been previously reported. Our findings and previous reports illustrate the morphogenetic complexity of the anterior belly of the digastric muscle, and their potential importance in confounding clinical evaluation or complicating surgical procedures in the submental region.
Abstract
A cross-over type asymmetric anomaly of the anterior belly of the right digastric muscle was observed during a cadaveric dissection of the submental region. Three irregularly-shaped supernumerary muscle bundles were found between the anterior bellies of the digastric muscles. Although the anomalies of the digastric muscles are often observed, this complicated pattern has not been previously reported. Our findings and previous reports illustrate the morphogenetic complexity of the anterior belly of the digastric muscle, and their potential importance in confounding clinical evaluation or complicating surgical procedures in the submental region.
Keywords
anatomic variant; anterior belly; asymmetry; submental region; human gross anatomy
About this articleTitle
Cross-over type of supernumerary digastric muscle
Journal
Issue
Pages
647-650
Published online
2018-12-05
DOI
10.5603/FM.a2018.0112
Pubmed
Bibliographic record
Folia Morphol 2019;78(3):647-650.
Keywords
anatomic variant
anterior belly
asymmetry
submental region
human gross anatomy
Authors
Ž. Šink
N. Umek
E. Cvetko
References (9)- Andreo JC. Caldas Navarro JA, Toledo Filho JL. Anatomical study on the variations of the anterior belly of the digastric muscle. Rev Chil Anatomía. Sociedad Chilena de Anatomía. 1997; 15(2): 111–114.
- Celik HH, Aldur MM, Ozdemir B, et al. Abnormal digastric muscle with unilateral quadrification of the anterior belly. Clin Anat. 2002; 15(1): 32–34.
- De-Ary-Pires B, Ary-Pires R, Pires-Neto MA. The human digastric muscle: patterns and variations with clinical and surgical correlations. Ann Anat. 2003; 185(5): 471–479.
- Fujimura A, Onodera M, Feng XY, et al. Abnormal anterior belly of the digastric muscle: a proposal for the classification of abnormalities. Anat Sci Int. 2003; 78(3): 185–188.
- Guelfguat M, Nurbhai N, Solounias N. Median accessory digastric muscle: radiological and surgical correlation. Clin Anat. 2001; 14(1): 42–46.
- Mangalagiri AS, Razvi MR. Variations in the anterior belly of diagastric. Int J Health Sci (Qassim). 2009; 3(2): 257–262.
- Ozgur Z, Govsa F, Ozgur T. The cause of the difference in the submental region: aberrant muscle bundles of the anterior belly of the digastric muscle. J Craniofac Surg. 2007; 18(4): 875–881.
- Sakamoto Y, Akita K. Supernumerary muscle bundles in the submental triangle: their positional relationships according to innervation. Surg Radiol Anat. 2004; 26(3): 245–253.
- Yamazaki Y, Shibata M, Ushiki T, et al. Bilateral, asymmetric anomalies of the anterior bellies of digastric muscles. J Oral Sci. 2011; 53(4): 523–527.