Ultrastructure and collagen composition of the myo-fascial junction in rat calf muscles.
The collagen composition and ultrastructural organization of the myo-fascial junction was studied using immunohistochemical techniques and electron microscopy. At the myo-fascial junction, a small amount of type-III collagen was found; however, the major collagen component was the type-I collagen. On the longitudinal sites of muscle cells, there were deep recesses and, within these, finger-like structures containing sarcomeres. In these recesses and in the finger-like structures of the myo-fascial junction, the sarcolemma was thickened (three times) in a similar way to the basal lamina at the myotendinous junction. Thin collagen fibers were closely associated with the thickened sarcolemma of the finger-like structures.
Järvinen
M
M
Department of Surgery, University of Tampere, Finland.
Jozsa
L
L
Kvist
M
M
Lehto
M
M
Vieno
T
T
Isola
J
J
Kannus
P
P
D000818:Animals; D003094:Collagen / Q000032:analysis*; D006614:Hindlimb / Q000033:anatomy & histology*; D007150:Immunohistochemistry; D008297:Male; D008854:Microscopy, Electron; D009132:Muscles / Q000737:chemistry / Q000648:ultrastructure*; D051381:Rats; D017207:Rats, Sprague-Dawley
D003094:Collagen