A1 Journal article (refereed)
ISB clinical biomechanics award winner 2023 : Medial gastrocnemius muscle and Achilles tendon interplay during gait in cerebral palsy (2024)


Cenni, F., Alexander, N., Sukanen, M., Mustafaoglu, A., Wang, Z., Wang, R., & Finni, T. (2024). ISB clinical biomechanics award winner 2023 : Medial gastrocnemius muscle and Achilles tendon interplay during gait in cerebral palsy. Clinical Biomechanics, 111, Article 106158. https://doi.org/10.1016/j.clinbiomech.2023.106158


JYU authors or editors


Publication details

All authors or editorsCenni, Francesco; Alexander, Nathalie; Sukanen, Maria; Mustafaoglu, Afet; Wang, Zhongzheng; Wang, Ruoli; Finni, Taija

Journal or seriesClinical Biomechanics

ISSN0268-0033

eISSN1879-1271

Publication year2024

Volume111

Article number106158

PublisherElsevier

Publication countryUnited Kingdom

Publication languageEnglish

DOIhttps://doi.org/10.1016/j.clinbiomech.2023.106158

Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/92515


Abstract

Background
The interplay between the medial gastrocnemius muscle and the Achilles tendon is crucial for efficient walking. In cerebral palsy, muscle and tendon remodelling alters the role of contractile and elastic components. The aim was to investigate the length changes of medial gastrocnemius belly and fascicles, and Achilles tendon to understand their interplay to gait propulsion in individuals with cerebral palsy.

Methods
Twelve young individuals with cerebral palsy and 12 typically developed peers were assessed during multiple gait cycles using 3D gait analysis combined with a portable ultrasound device. By mapping ultrasound image locations into the shank reference frame, the medial gastrocnemius belly, fascicle, and Achilles tendon lengths were estimated throughout the gait cycle. Participants with cerebral palsy were classified into equinus and non-equinus groups based on their sagittal ankle kinematics.

Findings
In typically developed participants, the Achilles tendon undertook most of the muscle-tendon unit lengthening during stance, whereas in individuals with cerebral palsy, this lengthening was shared between the medial gastrocnemius belly and Achilles tendon, which was more evident in the equinus group. The lengthening behaviour of the medial gastrocnemius fascicles resembled that of the Achilles tendon in cerebral palsy.

Interpretation
The findings revealed similar length changes of the medial gastrocnemius fascicles and Achilles tendon, highlighting the enhanced role of the muscle in absorbing energy during stance in cerebral palsy. These results, together with the current knowledge of increased intramuscular stiffness, suggest the exploitation of intramuscular passive forces for such energy absorption.


Keywordsmusclestendonskinematicscalcaneal tendonphysical training

Free keywordsmuscle and tendon length; fascicle length; muscle and tendon strain; pennation angle; joint kinematics; stance phase


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Ministry reportingYes

Reporting Year2024

Preliminary JUFO rating1


Last updated on 2024-02-07 at 23:26