A kinematically reasonable mechanism of tongue forward protrusion considering hyoid bone movements

Inoue, Kyoichi; Otani, Tomohiro; Nozaki, Kazunori et al.

Journal of Biomechanics, 2025, 178, 112445

Number of Access:819（2025-08-14 15:06 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98563

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Title
A kinematically reasonable mechanism of tongue forward protrusion considering hyoid bone movements
Creator
CreatorName
Inoue, Kyoichi
NRID
1000040778990 1000040778990
ORCID
0000-0002-6431-2703 0000-0002-6431-2703
researchmap permalink
bigvalley bigvalley
Scopus Author ID
55625962900 55625962900
CreatorName
Otani, Tomohiro
NRID
1000040379110 1000040379110
ORCID
0000-0003-3378-0915 0000-0003-3378-0915
researchmap permalink
dentgrid dentgrid
Scopus Author ID
36665004400 36665004400
CreatorName
Nozaki, Kazunori
NRID
1000050824190 1000050824190
researchmap permalink
t_yoshinaga t_yoshinaga
Scopus Author ID
56429907300 56429907300
ORCID
0000-0002-4655-4186 0000-0002-4655-4186
CreatorName
Yoshinaga, Tsukasa
NRID
1000070240546 1000070240546
researchmap permalink
shigeo41010 shigeo41010
Scopus Author ID
7401983636 7401983636
CreatorName
Wada, Shigeo
Subject
Tongue muscle
Genioglossus
Hyoid bone
Ultrasound imaging
Tongue kinematics
Finite element method
Description
Inoue Kyoichi, Otani Tomohiro, Nozaki Kazunori, et al. A kinematically reasonable mechanism of tongue forward protrusion considering hyoid bone movements. Journal of Biomechanics 178, 112445 (2024); https://doi.org/10.1016/j.jbiomech.2024.112445.
Abstract
The tongue has a wide variety of motor functions, which are driven by tongue muscle contractions and associated with movements of the hyoid bone (HB) connected to the tongue root. HB movement has been observed in many situations, including swallowing, breathing, and speech. However, the relationships between HB movement and tongue kinematic function have received little attention, and have not been considered in most previous biomechanical tongue modeling research, except studies of swallowing. The current study aimed to clarify the effects of HB movement on tongue kinematics during tongue forward protrusion, which is an essential tongue motor function associated with speech disorder. HB displacement during tongue forward protrusion was quantified using ultrasound imaging in four healthy controls. Furthermore, computational mechanical simulations of tongue forward protrusion were conducted with observed HB movements and active contraction of the genioglossus (GG) muscle, which is conventionally considered to be the driving muscle in tongue forward protrusion. Ultrasound imaging revealed anterosuperior HB displacement in tongue forward protrusion, with a similar magnitude in each direction (anterior: 6.3 ± 2.8 mm, superior: 5.8 ± 1.6 mm). Computational simulation demonstrated that the HB movement described above caused not only anterosuperior displacement, but also forward rotation of the tongue body, which was caused by kinematic constraints of GG. The resulting anterior displacement of the tongue tip was 1.5 times greater compared with that without HB movement. These findings indicate that the HB and associated tongue body movements play non-negligible roles in the tongue kinematics of forward protrusion.
Publisher
Elsevier BV
Source Title
Journal of Biomechanics
Volume (Issue)
178
Page
112445
Date of Issued
2025-01-01
Handle URL
https://hdl.handle.net/11094/98563
PISSN
00219290
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.jbiomech.2024.112445
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article