Mapping of movement in the isometrically contracting human soleus muscle reveals details of its structural and functional complexity

被引:50
作者
Finni, T
Hodgson, JA
Lai, AM
Edgerton, VR
Sinha, S
机构
[1] Univ Calif Los Angeles, Dept Physiol Sci, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Radiol, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Brain Res Inst, Los Angeles, CA 90095 USA
关键词
structure-function relationships; modeling; compartmentalization; biomechanics;
D O I
10.1152/japplphysiol.00596.2003
中图分类号
Q4 [生理学];
学科分类号
071003 [生理学];
摘要
It is becoming increasingly apparent that precise knowledge of the anatomic features of muscle, aponeurosis, and tendons is necessary for understanding how a muscle-tendon complex generates force and accomplishes length changes. This report presents both anatomic and functional data from the human soleus muscle acquired by using magnetic resonance imaging. The results show a strong relationship between the complex three-dimensional structure of the muscle-tendon system and the intramuscular distribution of tissue velocities during in vivo isometric contractions. The proximal region of the muscle is unipennate, whereas the midregion has a radially bipennate hemicylindrical structure, and the distal region is quadripennate. Tissue velocity mapping shows that the highest velocity regions overlay the aponeuroses connected to the Achilles tendon. These are located on the anterior and posterior surfaces of the muscle. The lowest velocities overlay the aponeuroses connected to the origin of the muscle and are generally located intramuscularly.
引用
收藏
页码:2128 / 2133
页数:6
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