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Biomechanical Effects of Transverse Carpal Ligament Release

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Abstract

The release of the transverse carpal ligament (TCL) causes only a slight widening of the carpal arch owing to the strong intercarpal ligaments. Palmar displacement of the released TCL contributes most of the postoperative increase in carpal tunnel volume. The TCL plays an important role in the digital flexor tendon pulley system at the wrist; it prevents bowstringing of the digital flexor tendons and allows maximum finger flexion while the wrist is flexed. Therefore, palmar displacement of the flexor tendons after TCL release increases the entrance angle and friction of the flexor tendons at the A1 pulley in all fingers. This increase is considered a cause of trigger finger. Release of the TCL also causes palmar displacement of some thenar muscle origins and shortens these muscles. Ensuing muscle imbalances might be related to pain at the base of the thenar area.

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Correspondence to Souichi Ohta .

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Ohta, S. (2017). Biomechanical Effects of Transverse Carpal Ligament Release. In: Duncan, S., Kakinoki, R. (eds) Carpal Tunnel Syndrome and Related Median Neuropathies. Springer, Cham. https://doi.org/10.1007/978-3-319-57010-5_25

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  • DOI: https://doi.org/10.1007/978-3-319-57010-5_25

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-57008-2

  • Online ISBN: 978-3-319-57010-5

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