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Rodent Model of Masseter Volumetric Muscle Loss for Studying Bioengineering Materials
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Aging-associated differences between perioral and trunk muscle characteristics.

Sirinthip Amornsuradech1,2, Kohei Yamaguchi3, Kazuharu Nakagawa1

  • 1Department of Dysphagia Rehabilitation, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.

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Summary

Aging impacts trunk and perioral muscles differently. Trunk muscle stiffness, quality, and quantity correlate with age, unlike perioral muscles, indicating distinct age-related changes.

Keywords:
AgingPerioral muscleTrunk muscleUltrasonography

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Area of Science:

  • Gerontology
  • Biomechanics
  • Musculoskeletal Health

Background:

  • Aging leads to physiological and functional changes affecting systemic and swallowing muscles.
  • Ultrasound is utilized for muscle characteristic assessment, but its relationship with age in perioral and trunk muscles, including stiffness, remains under-explored.

Purpose of the Study:

  • To investigate the relationship between chronological age and the characteristics (quality, quantity, stiffness) of perioral and trunk muscles using ultrasound.

Main Methods:

  • A cross-sectional study involving 215 participants (98 younger adults, 117 older adults).
  • Ultrasound was used to assess muscle characteristics.
  • Correlation and multiple linear regression analyses were performed, considering age, sex, body mass index, and number of teeth.

Main Results:

  • Trunk muscle stiffness demonstrated a significant association with age, surpassing the correlation observed in perioral muscles.
  • Muscle quality and quantity of the trunk showed a stronger correlation with age compared to perioral muscles.
  • Masseter muscle quality and quantity exhibited a higher correlation with age than the geniohyoid muscle.

Conclusions:

  • Age-related changes in trunk and perioral muscles differ in their characteristics.
  • Maintaining both trunk and perioral muscle activity is crucial for older adults to mitigate functional decline.