HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Lewis, D M Articles by Rowlerson, A Search for Related Content PubMed PubMed Citation Articles by Lewis, D M Articles by Rowlerson, A

1. Isometric contractions of motor units, isolated functionally by ventral root splitting in vivo, were recorded from mouse soleus muscle. 2. Motor unit tensions varied over a narrow symmetrical range and averaged 4.7% of whole muscle tension, corresponding to twenty-one motor units per muscle. 3. There was considerable variation between muscles in isometric twitch times-to-peak and even greater variation for the motor units. The distribution of motor unit times-to-peak was apparently unimodal and could be fitted by a single normal population. A slightly better fit was, however, obtained with two normal populations, as suggested by the histochemistry. 4. Twitch time-to-peak decreased in proportion to axonal conduction velocity in individual animals. The whole population of motor units could be fitted by a linear relation between time-to-peak and the reciprocal of conduction time in the motor axon. Motor unit tension was also linearly related to the reciprocal of conduction time. 5. Histochemistry showed clear division between Type I and Type IIa fibres. Type I fibres reacted strongly with antibody against slow myosin of cat soleus muscle; Type IIa gave a reaction no stronger than the background. The division was as clear as in the cat or rat.

This article has been cited by other articles:

				A. L. Gheyara, A. Vallejo-Illarramendi, K. Zang, L. Mei, R. St.-Arnaud, S. Dedhar, and L. F. Reichardt Deletion of Integrin-Linked Kinase from Skeletal Muscles of Mice Resembles Muscular Dystrophy Due to {alpha}7 1-Integrin Deficiency Am. J. Pathol., December 1, 2007; 171(6): 1966 - 1977. [Abstract] [Full Text] [PDF]

				M. A. Corbett, C. S. Robinson, G. F. Dunglison, N. Yang, J. E. Joya, A. W. Stewart, C. Schnell, P. W. Gunning, K. N. North, and E. C. Hardeman A mutation in {{alpha}}-tropomyosinslow affects muscle strength, maturation and hypertrophy in a mouse model for nemaline myopathy Hum. Mol. Genet., February 1, 2001; 10(4): 317 - 328. [Abstract] [Full Text] [PDF]

				R. Wadhwa, T. Sugihara, A. Yoshida, E. L. Duncan, E. C. Hardeman, H. Nomura, R. R. Reddel, and S. C. Kaul Cloning and Characterization of a Novel Gene, striamin, That Interacts with the Tumor Suppressor Protein p53 J. Biol. Chem., May 21, 1999; 274(21): 14948 - 14955. [Abstract] [Full Text] [PDF]