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The Biophysics of Contraction

The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

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Page 1: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

The Biophysics of Contraction

Page 2: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

An Apparatus for Measuring Tensile Forces in a Muscle

Muscle

tendon and clamp

tendon and

clamp

L

Force Transducer

Page 3: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

An Ideal Elastic Material-- Compliance Plot

Page 4: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

An Ideal Elastic Material-- Elastance Plot

Page 5: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

More About Elastance (Stiffness) and Compliance

Page 6: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Non-Linear Effects

Page 7: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Hysteresis

Page 8: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

The Effect of Stretching a Relaxed Muscle ("Passive Stretch")

Page 9: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

The Effect of Stretch on a Contracting Muscle ("Active Stretch")

Page 10: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Calculation of Contractile Forces vs. Length

Page 11: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Contractile Force and Muscle Length

Page 12: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Explanation for Active Force vs. Length

Page 13: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Latent Period

Page 14: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Overloads on Muscles

Page 15: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

A Mechanical Model of a Muscle

Page 16: The Biophysics of Contraction. An Apparatus for Measuring Tensile Forces in a Muscle Muscle tendon and clamp tendon and clamp L Force Transducer

Viscous Loss