Anat Cell Biol.
2021 Dec;54(4):522-524. 10.5115/acb.21.127.
Extended crossing fibers of the mentalis muscle attaching to the contralateral mandible
- Affiliations
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- 1Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.
- 2Department of Neurology, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.
- 3Dental and Oral Medical Center, Kurume University School of Medicine, Kurume, Fukuoka, Japan.
- 4Department of Anatomy, Catholic Kwandong University College of Medicine, Gangneung, Korea.
- 5Department of Oral and Maxillofacial Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
- 6Department of Anatomical Sciences, St. George's University, St. George's, Grenada, West Indies.
- KMID: 2523582
- DOI: http://doi.org/10.5115/acb.21.127
Abstract
- Fibers of the facial muscles occasionally extend, cross the midline, and connect to surrounding structures on the contralateral side, perhaps enabling the mouth to make more delicate movements and generate more facial expressions. This case report describes a variant in which the extended fibers of the mentalis crossed the midline and indicates the relationship of these fibers to the surrounding structures. Some of the deepest fibers of the mentalis descended inferomedially and crossed transversely just below the chin prominence to attach to the periosteum of the mandible on the contralateral side. The variation presented in this study shed light on the interactions of the mentalis with the surrounding muscles.
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