Strength and morphology of a suprahyoid muscle and their relationship to forward head posture in healthy older adults

Tamai, Tomoe; Hara, Koji; Nakagawa, Kazuharu; Namiki, Chizuru; Yamaguchi, Kohei; Yoshimi, Kanako; Yanagida, Ryosuke; Hasegawa, Shohei; Nakane, Ayako; Okumura, Takuma; Ishii, Miki; Tohara, Haruka

doi:10.1111/ggi.14457

Cited by 4 publications

(3 citation statements)

References 31 publications

(84 reference statements)

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“…Anterior head posture has been reported to affect the activity of the supraorbital muscles 11 ) ; therefore, it is necessary to consider structural changes in the neck, in addition to the kyphosis condition. Tamai et al 12 ) reported that the cross-sectional area and transverse diameter of the geniohyoid muscles decreased with an anterior head posture, and this posture was also associated with an opening force proportional to the action of the suprasellar muscles.…”

Section: Discussionmentioning

confidence: 99%

Effects of simulated kyphosis posture on swallowing and respiratory functions

Uchida,

Yamaguchi,

Tamai

et al. 2023

J Phys Ther Sci

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[Purpose] To evaluate the effects of kyphosis on swallowing and respiratory functions. [Participants and Methods] In 94 healthy adult volunteers, the respiratory (vital capacity, percentage of vital capacity, and cough peak flow and swallowing (hyoid amplitude and tongue pressure) functions, were evaluated under the following conditions: vertical, moderate kyphosis, and severe kyphosis postures defined by the round-back index. [Results] The mean vital capacity and percentage of vital capacity were significantly lower in severe kyphosis than in the vertical posture. The suprahyoid muscle amplitudes, tongue pressure, and cough peak flow was significantly lower in severe kyphosis than in moderate kyphosis or the vertical positions. [Conclusion] The swallowing and breathing functions were significantly lower in volunteers with severe kyphosis than in those with moderate kyphosis or the vertical positions. Although strengthening of the suprahyoid muscles is a typical example of rehabilitation for dysphagia, but it may also be necessary to consider postural adjustment for patients with kyphosis. A comprehensive evaluation of swallowing function that takes both posture and respiratory function into consideration is necessary.

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Section: Discussionmentioning

confidence: 99%

Effects of simulated kyphosis posture on swallowing and respiratory functions

Uchida,

Yamaguchi,

Tamai

et al. 2023

J Phys Ther Sci

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“…Therefore, the hyoid bone position is easily affected by posture and head position. Anatomically, the GHM and tongue are connected to the hyoid bone; therefore, a forward head posture increases the GHM length 15 and affects tongue position and morphology. When the mandibular bone is advanced by orthognathic surgery in patients with malocclusion, the length of the GHM increases significantly, and the CSA is greatly reduced compared to its preoperative state 26 .…”

Section: Discussionmentioning

confidence: 99%

“…The trunk muscles are associated with kyphosis severity 13 , wherein severe kyphosis leads to a forward head posture. The association between dysphagia and kyphosis has been reported 14 ; the more severe the forward head posture, the longer the GHM, and the longer the GHM, the lower the jaw opening force 15 . Morphological features are also related to muscle strength in swallowing-related muscles 3 .…”

Section: Introductionmentioning

confidence: 99%

Association between characteristics of swallowing-related muscles and trunk muscle mass

Yamaguchi

Nakagawa

Yoshimi

et al. 2023

Sci Rep

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Swallowing function is associated with systemic factors. Whether trunk or appendicular skeletal muscle mass is a better indicator of swallowing-related muscle characteristics in community-dwelling older adults is not clear. Hence, we investigated the association between the characteristics of swallowing-related muscles (e.g., mass and quality) and trunk muscle mass. Community-dwelling older adults aged ≥ 65 years (n = 141; men: n = 45, women: n = 96) were recruited for this cross-sectional observational study via a health survey conducted in 2018. Trunk muscle mass index (TMI) and appendicular skeletal muscle mass index (SMI) were measured using bioelectrical impedance analysis. Cross-sectional areas (CSAs) and echo intensity (EI) of the geniohyoid muscle (GHM) and tongue were evaluated using an ultrasonic diagnostic apparatus. Multiple regression analysis was used to examine the relationship of the characteristics of swallowing-related muscle with TMI and SMI. Multiple regression analysis showed that CSA of the GHM was positively associated with both TMI (B = 24.9, p < 0.001) and SMI (B = 13.7, p = 0.002). EIs of swallowing-related muscles were not associated with TMI and SMI. Trunk muscle mass was associated with swallowing-related muscle mass and not muscle quality. The results of this study shed light on the elucidation of association of dysphagia with TMI and SMI.

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