Computer-controlled, MR-compatible foot-pedal device to study dynamics of the muscle tendon complex under isometric, concentric, and eccentric contractions.
Computer-controlled, MR-compatible foot-pedal device to study dynamics of the muscle tendon complex under isometric, concentric, and eccentric contractions.
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DOI：
10.1002/jmri.23617
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发表时间：
2012-08
影响因子：
4.4
通讯作者：
Edgerton, V. Reggie
中科院分区：
文献类型：
--
作者：
Sinha, Shantanu;Shin, David D.;Hodgson, John A.;Kinugasa, Ryuta;Edgerton, V. Reggie
关键词：
To design a computer-controlled, MR compatible foot pedal device that allows in vivo mapping of changes in morphology and in strain of different musculoskeletal components of the lower leg under passive, isometric, concentric and eccentric contractions. A programmable servo-motor in the control room pumped hydraulic fluid to rotate a foot-pedal inside the magnet. Towards validating the performance of the device, six subjects were imaged with gated velocity-encoded phase-contrast (VE-PC) imaging to investigate dynamics of muscle and aponeurotic structures. Artifact-free VE-PC imaging clearly delineated different muscle compartments by differences in distribution of mechanical strains. High repeatability of contraction cycles allowed establishing that fascicles lengthened 6.1% more during passive compared to eccentric contractions. Aponeurosis separation during passive (range between three locations: −2.6~1.3 mm) and active (range: −2.4 ~1.6 mm) contractions were similar but significantly different from concentric (range: −0.9~3.3 mm), with proximal and distal regions showing mostly negative values for the first two modes, but positive for the last. The device was sufficiently robust and artifact-free to accurately assess, using VE-PC imaging, physiologically important structure and dynamics of the musculo-tendon complex.
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影响因子：
5.7
作者：
Newton JM;Dong Y;Hidler J;Plummer-D'Amato P;Marehbian J;Albistegui-Dubois RM;Woods RP;Dobkin BH
通讯作者：
Dobkin BH
DOI：
10.1097/00005768-200010000-00013
发表时间：
2000-10-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Akima, H;Kawakami, Y;Fukunaga, T
通讯作者：
Fukunaga, T
影响因子：
3.3
作者：
Sinha, Usha;Sinha, Shantanu;Edgerton, Reggie V.
通讯作者：
Edgerton, Reggie V.
影响因子：
5.5
作者：
Aagaard, P;Andersen, JL;Simonsen, EB
通讯作者：
Simonsen, EB
DOI：
10.1109/tnsre.2007.910286
发表时间：
2008-02-01
影响因子：
4.9
作者：
Khanicheh, Azadeh;Mintzopoulos, Dionyssios;Mavroidis, Constantinos
通讯作者：
Mavroidis, Constantinos