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Comment
. 2006 Jul 15;574(Pt 2):627-8; author reply 629-30.
doi: 10.1113/jphysiol.2006.574201.

Sarcomere popping requires stretch over a range where total tension decreases with length

David L Morgan, Uwe Proske
Comment

Sarcomere popping requires stretch over a range where total tension decreases with length

David L Morgan et al. J Physiol. .
No abstract available

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Figures

Figure 1
Figure 1. Length-independent partial activation
Schematic active and passive length–tension curves for half-sarcomeres with maximal (100%) and partial (50% and 20%) activation. The continuous lines are the total tension, the dashed lines, active tension and dotted line passive tension (offset exponential). It is assumed that submaximal activation is a scaled version of full activation. At 100%, the half-sarcomeres are expected to ‘pop’ to 1.9 μm (beyond overlap, see arrows), at 50% they ‘pop’ to less than 1.7 μm, and at 20%, there is no descending limb at all, and no ‘popping’ is predicted. Active curve is Gordon et al. (1966) with a thin filament length of 1.1 μm for mammalian muscle, shown as half-sarcomere lengths, as in Telley et al. (2006).
See this image and copyright information in PMC

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References

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