Age-dependent changes in the transverse carpal ligament and median nerve: a cadaveric histological and biomechanical study
Issued Date
2026-02-24
Resource Type
eISSN
21678359
Scopus ID
2-s2.0-105032801396
Journal Title
Peerj
Volume
14
Rights Holder(s)
SCOPUS
Bibliographic Citation
Peerj Vol.14 (2026)
Suggested Citation
Niyomchan A., Siriphorn A., Kathinted K., Pamornpol B. Age-dependent changes in the transverse carpal ligament and median nerve: a cadaveric histological and biomechanical study. Peerj Vol.14 (2026). doi:10.7717/peerj.20878 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/115794
Title
Age-dependent changes in the transverse carpal ligament and median nerve: a cadaveric histological and biomechanical study
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Abstract
Background: Age-related alterations in the transverse carpal ligament (TCL) and the median nerve are thought to increase susceptibility to carpal tunnel syndrome in older individuals. This study aimed to investigate the mechanical properties of the TCL and histological changes in both the TCL and the median nerve in cadavers across a wide age range. Methods: Fifty formalin-embalmed cadavers (40-93 years old) were studied, yielding 100 TCL specimens. A digital palpation device (MyotonPRO) was used in situ to measure TCL dynamic stiffness, elasticity (logarithmic decrement), mechanical stress relaxation time, and creep at proximal, middle, and distal regions. After testing, each TCL and corresponding median nerve were excised. Masson, s trichrome staining and scanning electron microscopy were performed to assess collagen fiber organization, fibroblast density, and nerve structure. Pearson, s correlation was used to determine associations between TCL properties and age. Results: An age-dependent increase in TCL stiffness was observed, alongside decreased elasticity, relaxation time, and creep. Histological analyses revealed reduced fibroblast density, disorganized collagen fibers with large clefts between bundles, and increased fine collagen meshwork in interfascicular matrix in older specimens. Furthermore, thinning of connective tissue layers surrounding the median nerve and diminished myelin sheaths were noted with advancing age. Conclusion: This cadaveric study reveals that the TCL stiffens and becomes structurally disorganized with advancing age, paralleled by degenerative changes in the median nerve. Such age-related alterations may predispose elderly individuals to a higher risk of carpal tunnel syndrome, underscoring the need for targeted preventive and therapeutic strategies.