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Non-uniform displacement within the Achilles tendon durig passive ankle joint motion.
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences, Laboratory for Biomechanics and Motor Control.ORCID iD: 0000-0002-1210-6449
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences, Laboratory for Biomechanics and Motor Control.
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2012 (English)In: Knee Surgery, Sports Traumatology, Arthroscopy, ISSN 0942-2056, E-ISSN 1433-7347, Vol. 20, no 9, 1868-74 p.Article in journal (Refereed) Published
Abstract [en]

PURPOSE:

An initial step in the understanding of Achilles tendon dynamics is to investigate the effects of passive motion, thereby minimising muscle activation and reducing internal joint forces. Internal tendon dynamics during passive ankle joint motion have direct implications for clinical rehabilitation protocols after Achilles tendon surgery. The aim of this study was to test the hypothesis that tendon tissue displacement is different in different layers of the Achilles tendon during controlled passive ankle joint movements.

METHODS:

Ultrasound imaging was conducted on the right Achilles tendon of nine healthy recreationally active males. Standardised isokinetic passive dorsi-plantar-flexion movements were performed with a total range of motion of 35°. The tendon was divided into superficial, central and deep layers in the resulting B-mode ultrasound images viewed in the sagittal plane. A block-matching speckle tracking algorithm was applied post-process, with kernels for the measurement of displacement placed in each of the layers.

RESULTS:

The mean (SD) displacement of the Achilles tendon during passive dorsiflexion was 8.4 (1.9) mm in the superficial layer, 9.4 (1.9) mm in the central portion and 10.4 (2.1) mm in the deep layer, respectively. In all cases, the movement of the deep layer of the tendon was greater than that of the superficial one (P < 0.01).

CONCLUSIONS:

These results, achieved in vivo with ultrasonographic speckle tracking, indicated complex dynamic differences in different layers of the Achilles tendon, which could have implications for the understanding of healing processes of tendon pathologies and also of normal tendon function.

Place, publisher, year, edition, pages
2012. Vol. 20, no 9, 1868-74 p.
National Category
Structural Biology
Research subject
Medicine/Technology
Identifiers
URN: urn:nbn:se:gih:diva-2450DOI: 10.1007/s00167-011-1801-9PubMedID: 22120840OAI: oai:DiVA.org:gih-2450DiVA: diva2:563381
Available from: 2012-10-30 Created: 2012-10-30 Last updated: 2015-12-04Bibliographically approved

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Arndt, AntonThorstensson, Alf

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