open access

Vol 82, No 3 (2023)
Original article
Submitted: 2022-08-08
Accepted: 2022-08-16
Published online: 2022-08-25
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Morphological study of the anatomical variations of anterior belly of digastric muscle in Brazilian cadavers

D. J. Gross1, A. C. Rossi1, B. C. Ferreira-Pileggi1, L. N. O. Watanabe1, P. R. Botacin2, F. B. Prado1, A. R. Freire1
·
Pubmed: 36165905
·
Folia Morphol 2023;82(3):677-682.
Affiliations
  1. Department of Biosciences, Anatomy Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
  2. Basic Sciences Department, Araçatuba Dental School, Paulista State University – UNESP, Araçatuba, São Paulo, Brazil

open access

Vol 82, No 3 (2023)
ORIGINAL ARTICLES
Submitted: 2022-08-08
Accepted: 2022-08-16
Published online: 2022-08-25

Abstract

Background: Cases of variations in anterior belly of the digastric muscle must be
carefully identified to avoid misinterpretations and assist in the correct surgical or
aesthetic procedure and help in the teaching of anatomy. The aim of this study
was to describe the anatomical variations of anterior belly of digastric muscle in
Brazilian cadavers.
Materials and methods: Thirty-one human heads were selected, from adult
cadavers (18–80 years, 29 males and 2 females). The morphology of the anterior
belly of the digastric muscle was observed, identifying the possible anatomical
variations that were characterised and classified according to the amount of
muscle bellies, fibre direction and place of origin and insertion. The morphometric
measurements were performed using a digital calliper. To analyse the data
obtained, photographic documentation, anatomical description and individual
morphometric description of each muscle belly were performed. The incidence
of anatomical variation was obtained in percentage (%).
Results: The anatomical variation of the anterior belly of the digastric muscle was
present in 6 cadavers (19.31%; 1 female and 5 male). All anatomical variations
presented an accessory belly to the anterior belly. However, these accessory bellies
were configured differently in the location, direction of muscle fibres and in their
dimensions (length and width).
Conclusions: The gross anatomy of the anterior belly of the digastric muscle
and their variations is important to assist in surgical procedures, pathological or
diagnostic function. In addition, asymmetrical variations in the submental region
must be carefully identified to avoid misinterpretations.

Abstract

Background: Cases of variations in anterior belly of the digastric muscle must be
carefully identified to avoid misinterpretations and assist in the correct surgical or
aesthetic procedure and help in the teaching of anatomy. The aim of this study
was to describe the anatomical variations of anterior belly of digastric muscle in
Brazilian cadavers.
Materials and methods: Thirty-one human heads were selected, from adult
cadavers (18–80 years, 29 males and 2 females). The morphology of the anterior
belly of the digastric muscle was observed, identifying the possible anatomical
variations that were characterised and classified according to the amount of
muscle bellies, fibre direction and place of origin and insertion. The morphometric
measurements were performed using a digital calliper. To analyse the data
obtained, photographic documentation, anatomical description and individual
morphometric description of each muscle belly were performed. The incidence
of anatomical variation was obtained in percentage (%).
Results: The anatomical variation of the anterior belly of the digastric muscle was
present in 6 cadavers (19.31%; 1 female and 5 male). All anatomical variations
presented an accessory belly to the anterior belly. However, these accessory bellies
were configured differently in the location, direction of muscle fibres and in their
dimensions (length and width).
Conclusions: The gross anatomy of the anterior belly of the digastric muscle
and their variations is important to assist in surgical procedures, pathological or
diagnostic function. In addition, asymmetrical variations in the submental region
must be carefully identified to avoid misinterpretations.

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Keywords

anatomy, digastric muscle, anatomical variations, morphology

About this article
Title

Morphological study of the anatomical variations of anterior belly of digastric muscle in Brazilian cadavers

Journal

Folia Morphologica

Issue

Vol 82, No 3 (2023)

Article type

Original article

Pages

677-682

Published online

2022-08-25

Page views

952

Article views/downloads

591

DOI

10.5603/FM.a2022.0076

Pubmed

36165905

Bibliographic record

Folia Morphol 2023;82(3):677-682.

Keywords

anatomy
digastric muscle
anatomical variations
morphology

Authors

D. J. Gross
A. C. Rossi
B. C. Ferreira-Pileggi
L. N. O. Watanabe
P. R. Botacin
F. B. Prado
A. R. Freire

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