两块双室肌等长和负荷移动长度-张力模型的比较。

Comparison of isometric and load moving length-tension models of two bicompartmental muscles.

作者信息

Vance T L, Solomonow M, Baratta R, Zembo M, D'Ambrosia R D

机构信息

Department of Orthopaedics, Louisiana State University Medical Center, New Orleans 70112.

出版信息

IEEE Trans Biomed Eng. 1994 Aug;41(8):771-81. doi: 10.1109/10.310092.

DOI:10.1109/10.310092

PMID:7927399

Abstract

The length-tension relations of two bicompartmental muscles, including parallel and pennated fibers, were experimentally determined for isometric and load moving contractions. Comparison of the isometric and constant mass load length-tension curves obtained from the same preparations demonstrated significant reductions in force, a shift of the optimal length and increased elongation range for shortening contractions under constant mass load. Pennated muscle demonstrated a larger reduction in force and greater shift in the optimal length relative to the changes in a muscle with parallel fibers. A bicompartmental model was fitted to the experimental data to provide quantitative insight to the changes described above, and for use in mathematical models of other bicompartmental muscles, and for design of optimal electrical stimulation system for restoration of function in spinal cord injury patients.

摘要

针对包括平行纤维和羽状纤维的两块双腔肌，通过实验确定了等长收缩和负载移动收缩时的长度-张力关系。对从相同标本获得的等长收缩和恒定质量负载长度-张力曲线进行比较，结果表明，在恒定质量负载下进行缩短收缩时，力显著降低、最佳长度发生偏移且伸长范围增加。相对于具有平行纤维的肌肉变化，羽状肌的力降低幅度更大，最佳长度的偏移也更大。将双腔模型拟合到实验数据中，以便对上述变化提供定量见解，并用于其他双腔肌的数学模型，以及设计用于恢复脊髓损伤患者功能的最佳电刺激系统。