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Muscle Contraction and Relaxation Described by Tactile Stiffness
Author(s) -
Inaba Hirotaka,
Miyaji Kagami,
Kaneko Yukihiro,
Ohtsuka Toshiya,
Takamoto Shinichi,
Omata Sadao
Publication year - 2001
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1046/j.1525-1594.2001.025001042.x
Subject(s) - cardiomyoplasty , stiffness , ripple , contraction (grammar) , latissimus dorsi muscle , time constant , biomedical engineering , materials science , muscle contraction , relaxation (psychology) , medicine , anatomy , physics , cardiology , composite material , engineering , heart failure , electrical engineering , quantum mechanics , voltage
We developed a tactile sensor system that measures the stiffness of objects (tactile stiffness) and used it to describe the time course of muscle contraction and relaxation. We examined fatigue resistance of the latissimus dorsi muscle (LDM), which is preconditioned for cardiomyoplasty. Time to peak, ripple of LDM, and time constant were calculated from the time course of LDM contraction and relaxation as described by tactile stiffness. We compared conditioned and unconditioned LDMs using these 3 parameters. The time course can be described by tactile stiffness. Tactile stiffness fell exponentially during LDM relaxation. In mean values, time to peak increased 230%, ripple decreased 20%, and time constants increased 424%. Significant differences were shown in 3 parameters between conditioned and unconditioned LDMs (p < 0.05). Our tactile sensor system can describe the time course of LDM contraction and relaxation. Examining the difference in time courses, we might detect the level of LDM preconditioning for cardiomyoplasty.