Methods to find aponeurosis and tendon stiffness and the onset of muscle contraction

A method to measure small movements of living tissues either large or small is presented. The method is based on the detection of changes in reflected infrared light. An optocoupler (coupled photodiode and photodetector) and a small (<1 cm 2) mirror were used. The optocoupler (OC) has a low cost...

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Bibliographic Details
Published inJournal of neuroscience methods Vol. 78; no. 1; pp. 125 - 132
Main Authors Delgado-Lezama, Rodolfo, Raya, J.G, Muñoz-Martı́nez, E.J
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 30.12.1997
Elsevier Science
Subjects
Achilles Tendon - physiology
Animals
Biological and medical sciences
Bone Nails
Cats
Electrophysiology - instrumentation
Electrophysiology - methods
Fundamental and applied biological sciences. Psychology
General aspects. Models. Methods
Male
Movement
Muscle Contraction - physiology
Muscle, Skeletal - innervation
Muscle, Skeletal - physiology
Optoelectric method
Reproducibility of Results
Stress, Mechanical
Tendon stiffness
Tendon stretch
Tendons - physiology
Vertebrates: nervous system and sense organs
Optoelectric method
Tendon stiffness
Tendon stretch
Fissipedia
Carnivora
Optoelectronics
Methodology
Soleus muscle
Muscle contraction
Vertebrata
Mammalia
Aponeurosis
Cat
Stiffness
Measurement method
Tendon
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Summary:A method to measure small movements of living tissues either large or small is presented. The method is based on the detection of changes in reflected infrared light. An optocoupler (coupled photodiode and photodetector) and a small (<1 cm 2) mirror were used. The optocoupler (OC) has a low cost and it can be calibrated easily. It can be also used as the transducer of a strain-gage. Three different uses are shown: (a) as a strain-gage transducer; (b) detection of tendon and aponeurosis movements in large muscles (cat soleus); (c) detection of the onset of muscle contraction. Movements of less than 1 μm can be detected with the aid of automatic averaging of the signals. Concerning the second use (b), it permits the estimation of tendon stretch. Concerning the third use, the onset of muscle movement precedes by at least 2 ms that of the force recorded at the tendon.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0165-0270
1872-678X
DOI:10.1016/S0165-0270(97)00143-X