Abstract
The authors have reported the results of examination by electron microscopy of two muscle biopsy specimens from cases of myotonia congenita and three cases of myotonia dystrophica. They have stated that "peripheral annular formation" was a frequently observed alteration in the myotonia congenita cases. In the myotonia dystrophica cases there were additionally disorganized myofibrils in the subsarcolemmal region and inclusion body vacuoles morphologically connected with the sarcolemma. The term "peripheral annular formation" refers to the situation in which the peripheral myofibrils of the muscle fiber fracture and the fragments retract and form a helical sheath around the central myofibrils of the same muscle fiber.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
