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Minimal shortening in a high-frequency muscle

Brad R. Moon1,*, Kevin E. Conley2, Stan L. Lindstedt3 and Michael R. Urquhart3

1 Department of Biology, PO Box 42451, University of Louisiana at Lafayette, Lafayette, LA 70504-2451, USA
2 Department of Radiology, Box 357115, University of Washington Medical Center, Seattle, WA 98195, USA
3 Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA



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  		Fig. 1. Sinusoidal strain (thick black lines) and activation patterns (thin grey lines) in the lateral tailshaker muscle of a western diamondback rattlesnake Crotalus atrox rattling at 30°C and 58 Hz. Data for the right side (top) and left side (bottom) muscles show different lengths because the distance between sonomicrometry crystals varied slightly, not because the muscles have different resting lengths or strains.

 


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  		Fig. 2. In vivo strain of the lateral and ventrolateral tailshaker muscles during rattling in western diamondback rattlesnakes Crotalus atrox. The multivariate regression results are given in Table 2.

 


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  		Fig. 3. In vivo shortening velocities of the lateral and ventrolateral tailshaker muscles during rattling in western diamondback rattlesnakes Crotalus atrox. The multivariate regression results are given in Table 2.

 

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© The Company of Biologists Ltd 2003