The Z-band lattice in skeletal muscle before, during and after tetanic contraction

التفاصيل البيبلوغرافية
العنوان: The Z-band lattice in skeletal muscle before, during and after tetanic contraction
المؤلفون: Goldstein, Margaret A., Michael, Lloyd H., Schroeter, John P., Sass, Ronald L.
المصدر: Journal of Muscle Research and Cell Motility; December 1986, Vol. 7 Issue: 6 p527-536, 10p
مستخلص: Summary Electron micrographs and optical diffraction patterns of the Z-band were studied in rat soleus muscle fixed before, during, and after tetanic contraction. We compared the morphology (small square or basketweave pattern) and dimensions of the Z-lattice of control and tetanized muscles near rest length. Z-bands of muscle fixed at rest and of muscle allowed to rest after a tetanic contraction exhibited the small square pattern. Z-bands from muscle fixed during tetanic contraction exhibited the basketweave pattern. Concomitant with the transition to basketweave, we observed an average increase of 20% in spacing between the axial filaments of the Z-lattice. Optical diffraction measurements of the A-bandd10 spacing revealed that the Z/A ratio remained constant during the transition. We have modelled the small square to basketweave transformation as resulting from a change of curvature of constant length cross-connecting Z-filaments when the axial filaments increase their separation.
قاعدة البيانات: Supplemental Index
الوصف
تدمد:01424319
15732657
DOI:10.1007/BF01753569