Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Equatorial X-ray reflections from contracting muscle after an applied stretch


The equatorial X-ray reflections were recorded from contracting muscle after a slow stretch. The intensity ratio of the 1,0 to the 1,1 reflections (I10/I11) after the stretch was not significantly different from that during an isometric tetanus at the same sarcomere length, although the tension after the stretch was considerably greater than isometric. This suggests that an almost identical number of cross-bridges produce a greater tension after a slow stretch than during an isometric tetanus.

This is a preview of subscription content, log in to check access.


  1. Abbott, B.C., Aubert, X.M.: The force exerted by active striated muscle during and after change of length. J. Physiol.117, 77–86 (1952).

  2. Allemand, R., Thomas, G.: Methode le localisation de rayonnement X a haute resolution spatiale: description et performances obtenus. Note Technique LETL/MCTE, Grenoble, Nr. 1056 (1974).

  3. Huxley, H.E.: Muscle cells. In: The Cell, vol. IV ed. Brachet, J. & Mirsky, A.E.: New York-London: Academic Press (1960).

  4. Huxley, H.E.: Structural difference between resting and rigor muscle; evidence from intensity changes in the low-angle equatorial X-ray diagram. J. Mol. Biol.37, 507–520 (1968).

  5. Huxley, H.E., Brown, W.: The low-angle X-ray diagram of vertebrate striated muscle and its behaviour during contraction and rigor. J. Mol. Biol.30, 384–434 (1967).

  6. Yagi, N., Ito, M.H., Nakajima, H., Izumi, T., Matsubara, I.: Return of myosin heads to thick filaments after muscle contraction. Science197, 685–687 (1977).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Yagi, N., Matsubara, I. Equatorial X-ray reflections from contracting muscle after an applied stretch. Pflugers Arch. 372, 113–114 (1977).

Download citation

Key words

  • Muscle contraction
  • X-ray diffraction