Morphology and histochemistry of the myotendineal junction of the rat calf muscles. Histochemical, immunohistochemical and electron-microscopic study

M. Kvist, L. Józsa, P. Kannus, J. Isola, T. Vieno, M. Jarvinen, M. Lehto

Research output: Article

33 Citations (Scopus)

Abstract

The macromolecular composition and morphometry of the myotendineal junction (MTJ) of slow-twitch (type 1) and fast-twitch (type 2) muscle fibers were studied in gastrocnemius-soleus-Achilles unit of the rat. Proteoglycans and glycosaminoglycans, type III collagen, fibronectin and laminin could be detected at the myotendineal junction. Due to the membrane folding finger-like processes were seen at the MTJ. The processes of type 1 fibers were greater in size. However, due to the subdivisions the processes of type 2 muscle fibers had a significantly greater surface length per muscle cell diameter than type 1 fibers. The myotendineal endings of both fiber types had a characteristic basal lamina, which was about three times thicker than in the longitudinal site of the same muscle cells. The basal lamina of type 1 fibers at the MTJ was significantly thicker than that of type 2 fibers.

Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalActa Anatomica
Volume141
Issue number3
Publication statusPublished - 1991

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Fast-Twitch Muscle Fibers
Basement Membrane
Muscle Cells
Electrons
Muscles
Collagen Type III
Laminin
Proteoglycans
Glycosaminoglycans
Fibronectins
Membranes
Spinal Cord Dorsal Horn

ASJC Scopus subject areas

  • Anatomy

Cite this

Morphology and histochemistry of the myotendineal junction of the rat calf muscles. Histochemical, immunohistochemical and electron-microscopic study. / Kvist, M.; Józsa, L.; Kannus, P.; Isola, J.; Vieno, T.; Jarvinen, M.; Lehto, M.

In: Acta Anatomica, Vol. 141, No. 3, 1991, p. 199-205.

Research output: Article

Kvist, M. ; Józsa, L. ; Kannus, P. ; Isola, J. ; Vieno, T. ; Jarvinen, M. ; Lehto, M. / Morphology and histochemistry of the myotendineal junction of the rat calf muscles. Histochemical, immunohistochemical and electron-microscopic study. In: Acta Anatomica. 1991 ; Vol. 141, No. 3. pp. 199-205.
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