DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Curvature of gastrocnemius muscle fascicles as function of muscle-tendon complex length and contraction in humans

Heieis, Jule and Böcker, Jonas and D'Angelo, Olfa and Mittag, Uwe and Albracht, Kirsten and Schönau, Eckhard and Meyer, Andreas and Voigtmann, Thomas and Rittweger, Jörn (2023) Curvature of gastrocnemius muscle fascicles as function of muscle-tendon complex length and contraction in humans. Physiological Reports, 11 (11), e15739. Wiley. doi: 10.14814/phy2.15739. ISSN 2051-817X.

[img] PDF - Published version

Official URL: https://doi.org/10.14814/phy2.15739


It has been shown that muscle fascicle curvature increases with increasing contraction level and decreasing muscle–tendon complex length. The analyses were done with limited examination windows concerning contraction level, muscle–tendon complex length, and/or intramuscular position of ultrasound imaging. With this study we aimed to investigate the correlation between fascicle arching and contraction, muscle–tendon complex length and their associated architectural parameters in gastrocnemius muscles to develop hypotheses concerning the fundamental mechanism of fascicle curving. Twelve participants were tested in five different positions (90°/105°*, 90°/90°*, 135°/90°*, 170°/90°*, and 170°/75°*; *knee/ankle angle). They performed isometric contractions at four different contraction levels (5%, 25%, 50%, and 75% of maximum voluntary contraction) in each position. Panoramic ultrasound images of gastrocnemius muscles were collected at rest and during constant contraction. Aponeuroses and fascicles were tracked in all ultrasound images and the parameters fascicle curvature, muscle–tendon complex strain, contraction level, pennation angle, fascicle length, fascicle strain, intramuscular position, sex and age group were analyzed by linear mixed effect models. Mean fascicle curvature of the medial gastrocnemius increased with contraction level (+5 m−1 from 0% to 100%; p = 0.006). Muscle–tendon complex length had no significant impact on mean fascicle curvature. Mean pennation angle (2.2 m−1 per 10°; p < 0.001), inverse mean fascicle length (20 m−1 per cm−1; p = 0.003), and mean fascicle strain (−0.07 m−1 per +10%; p = 0.004) correlated with mean fascicle curvature. Evidence has also been found for intermuscular, intramuscular, and sex-specific intramuscular differences of fascicle curving. Pennation angle and the inverse fascicle length show the highest predictive capacities for fascicle curving. Due to the strong correlations between pennation angle and fascicle curvature and the intramuscular pattern of curving we suggest for future studies to examine correlations between fascicle curvature and intramuscular fluid pressure.

Item URL in elib:https://elib.dlr.de/195377/
Document Type:Article
Title:Curvature of gastrocnemius muscle fascicles as function of muscle-tendon complex length and contraction in humans
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Heieis, JuleInstitute of Aerospace Medicine, German Aerospace Center (DLR), 51147 Cologne, GermanyUNSPECIFIEDUNSPECIFIED
Böcker, JonasUNSPECIFIEDhttps://orcid.org/0000-0002-2388-0384UNSPECIFIED
D'Angelo, OlfaFriedrich-Alexander-Universität Erlangen-Nürnberghttps://orcid.org/0000-0002-7218-4596UNSPECIFIED
Mittag, UweGerman Aerospace Center (DLR), Institute of Aerospace Medicine, Division of Space Physiology, Cologne, GermanyUNSPECIFIEDUNSPECIFIED
Albracht, KirstenGerman Sport University Colognehttps://orcid.org/0000-0002-4271-2511UNSPECIFIED
Schönau, EckhardUniversity of Cologne, University Children Hospital, Cologne, GermanyUNSPECIFIEDUNSPECIFIED
Rittweger, JörnUNSPECIFIEDhttps://orcid.org/0000-0002-2223-8963UNSPECIFIED
Date:3 June 2023
Journal or Publication Title:Physiological Reports
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:e15739
Keywords:biomechanics, connective tissue, physiology, ultrasound, muscle fascicles, fascicle curvature
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Muscle Mechanics and Metabolism
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine
Institute of Aerospace Medicine > Muscle and Bone Metabolism
Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Voigtmann, Dr.rer.nat. Thomas
Deposited On:05 Jun 2023 06:32
Last Modified:07 Jun 2023 09:52

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.