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Proceedings Paper

Colloidal phase transitions in muscles: analogy to actuators
Author(s): Vaclav Bouda; Lea Boudova; Denisa Haluzikova
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Paper Abstract

The contribution describes the effects of both van der Waals and repulsive electrostatic forces on the function of micron-sized contractile units of the human muscles - sarcomere. The first step of the contraction of 1-2 nm is assumed to be phase transition of the internal structure of actin filaments. The most significant second step of contraction is interpreted as calcium induced phase transition of the lattice of colloid-sized myosin heads, which results in relative actin-myosin sliding of about 6-7 nm. The third step of the contraction of 1-2 nm seems to be the result of the classical myosin heads swinging. The model should provide the engineer and physicist with a simple analogy to technical actuators of high performance.

Paper Details

Date Published: 11 March 2003
PDF: 9 pages
Proc. SPIE 4946, Transducing Materials and Devices, (11 March 2003); doi: 10.1117/12.468375
Show Author Affiliations
Vaclav Bouda, Czech Technical Univ. (Czech Republic)
Lea Boudova, Charles Univ. in Prague (Czech Republic)
Denisa Haluzikova, Charles Univ. in Prague (Czech Republic)

Published in SPIE Proceedings Vol. 4946:
Transducing Materials and Devices
Yoseph Bar-Cohen, Editor(s)

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