Striated Muscle-Circumferential Myofibrils

Striate d muscle fibers may in some places be encircled by thin spiral muscle fibers. These peculiar structures are called circumferential myofibrils (Ring-binden). They are thought to be signs of degradation. Note that the typical striation has become diffuse in these regions. The number of nuclei is often increased. The figure shows several circumferential myofibrils in the human uvula. In the lower part of the picture is a regular muscle fiber with well-defined striation. The preparation has been treated with azocarmine as a secondary stain.

Stain: azan; magnification: × 500

References

Kuehnel, W.(2003). Color Atlas of Cytology, Histology, and Microscopic Anatomy. 4^th edition . Institute of Anatomy Universitätzu Luebeck Luebeck, Germany . Thieme Stuttgar t · New York .