open access

Vol 81, No 4 (2022)
Case report
Submitted: 2021-09-20
Accepted: 2021-10-27
Published online: 2021-11-05
Get Citation

Variant innervation of the mylohyoid muscle by the lingual nerve

A. J Cooper1, A. Sadr2, L. Xu3, R. S. Tubbs3456789, J. Iwanaga451011
·
Pubmed: 34750801
·
Folia Morphol 2022;81(4):1079-1081.
Affiliations
  1. Department of Biology, University of St. Francis, Joliet, IL, United States
  2. Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle, WA, United States
  3. Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA, United States
  4. Department of Neurosurgery, Tulane Centre for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, United States
  5. Department of Neurology, Tulane Centre for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, United States
  6. Department of Anatomical Sciences, St. George’s University, St. George’s, Grenada, West Indies
  7. Department of Surgery, Tulane University School of Medicine, New Orleans, LA, United States
  8. Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA, United States
  9. University of Queensland, Brisbane, Australia
  10. Dental and Oral Medical Centre, Kurume University School of Medicine, Kurume, Fukuoka, Japan
  11. Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Fukuoka, Japan

open access

Vol 81, No 4 (2022)
CASE REPORTS
Submitted: 2021-09-20
Accepted: 2021-10-27
Published online: 2021-11-05

Abstract

The nerve to mylohyoid muscle supplies the mylohyoid and the anterior belly of the digastric muscles, with terminal sensory branches that might innervate the submental skin and mandibular teeth. The nerve to mylohyoid muscle typically originates from the posterior surface of the inferior alveolar nerve right before entering the mandibular foramen. In rare cases, the nerve to mylohyoid muscle arises from the lingual nerve. The variations of the nerve to mylohyoid muscle might have led to failure of an inferior alveolar nerve blockade. During the routine dissection of a cadaveric head, a rare case was identified where the nerve to mylohyoid muscle had origins from both the inferior alveolar and lingual nerves. This case is reviewed and salient literature reviewed.

Abstract

The nerve to mylohyoid muscle supplies the mylohyoid and the anterior belly of the digastric muscles, with terminal sensory branches that might innervate the submental skin and mandibular teeth. The nerve to mylohyoid muscle typically originates from the posterior surface of the inferior alveolar nerve right before entering the mandibular foramen. In rare cases, the nerve to mylohyoid muscle arises from the lingual nerve. The variations of the nerve to mylohyoid muscle might have led to failure of an inferior alveolar nerve blockade. During the routine dissection of a cadaveric head, a rare case was identified where the nerve to mylohyoid muscle had origins from both the inferior alveolar and lingual nerves. This case is reviewed and salient literature reviewed.

Get Citation

Keywords

nerve to mylohyoid muscle, lingual nerve, inferior alveolar nerve, cadaver, anatomy

About this article
Title

Variant innervation of the mylohyoid muscle by the lingual nerve

Journal

Folia Morphologica

Issue

Vol 81, No 4 (2022)

Article type

Case report

Pages

1079-1081

Published online

2021-11-05

Page views

4156

Article views/downloads

716

DOI

10.5603/FM.a2021.0118

Pubmed

34750801

Bibliographic record

Folia Morphol 2022;81(4):1079-1081.

Keywords

nerve to mylohyoid muscle
lingual nerve
inferior alveolar nerve
cadaver
anatomy

Authors

A. J Cooper
A. Sadr
L. Xu
R. S. Tubbs
J. Iwanaga

References (10)
  1. Behnia H, Kheradvar A, Shahrokhi M. An anatomic study of the lingual nerve. J Oral Maxillofac Surg. 2000; 58: 649–651.
  2. Clark S, Reader A, Beck M, et al. Anesthetic efficacy of the mylohyoid nerve block and combination inferior alveolar nerve block/mylohyoid nerve block. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1999; 87(5): 557–563.
  3. Iwanaga J, Kikuta S, Oskouian RJ, et al. Nerve to mylohyoid branched from the lingual nerve: previously undescribed case. Anat Sci Int. 2019; 94(3): 266–268.
  4. Iwanaga J, Kim HJ, Wysiadecki G, et al. Localizing the nerve to the mylohyoid using the mylohyoid triangle. Anat Cell Biol. 2021; 54(3): 304–307.
  5. Iwanaga J, Singh V, Ohtsuka A, et al. Acknowledging the use of human cadaveric tissues in research papers: Recommendations from anatomical journal editors. Clin Anat. 2021; 34(1): 2–4.
  6. Ryu EJ, Kim DH. Anatomical insights of the mylohyoid for clinical procedures in dentistry. Clin Anat. 2021; 34(3): 461–469.
  7. Ryumon S, Hage D, Ibaragi S, et al. Dual innervation of the submandibular gland by nerve to mylohyoid and chorda tympani. Morphologie. 2021; 105(351): 316–318.
  8. Sato I, Sunohara M, Ueno R, et al. Branch of mylohyoid and lingual nerves on submandibular and submental triangles. Okajimas Folia Anat Jpn. 2004; 81(2-3): 45–48.
  9. Sperber GH, Sperber SM, Guttmann GD. Craniofacial embryogenetics and development, 3rd edn. People's Medical Publishing House, Beijing 2018.
  10. Tubbs RS, Shoja MM, Loukas M. Bergman's comprehensive encyclopedia of human anatomic variation. John Wiley & Sons, Hoboken, NJ 2016.

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