Changes in Trapezius Muscle Structure in Fibromyalgia and Chronic Trapezius Myalgia

Rolf Lindman Department of Anatomy, Department of Internal Medicine and the Neuromuscular Unit, University of Umeå, University Hospital, Linköping and the National Institute of Occupational Health, Division of Work and Environmental Physiology, Solna, Sweden

Mats Hagberg Professor, Department of Anatomy, Department of Internal Medicine and teh Neuromuscular Unit, University of Umeå, University Hospita, Linköping and the National Instutute of Occupational Health, Division of Work and Environmental Physiology, Solna

Ann Bengtsson Associate Professor, Department of Anatomy, Department of Internal Medicine, Neuromuscular Unit, University of Umeå, University Hospital, Linköping, National Insitute of Occupational Health, Division of Work, Environmental Physiology, Solna, Swede

K. G. Henricksson Associate Professor, Departmetn of Anatomy, Department of Internal medicine, Neuromuscular Unit, University of Umeå, University Hospital, Linköping, National Institute of Occupational Health, Division of Work and Environmental Physiology, Solna, S

Lars-Eric Thornell Professor, Department of Anatomy, Department of Internal Medicine, Neuromuscular Unit, University of Umeå, University Hospital, Linköping, National Institute of Occupational Health, Division of Work, Environmental Physiology, Solna, Sweden

Abstract

Objectives: To reveal possible changes in muscle structure related to chronic myalgia. Methods: Muscle biopsies from tender areas of the trapezius muscle, and from corresponding areas of healthy subjects were studied by electron microscopy. Results: Fibres with an aberrant myofibrillar structure and an altered distribution and structure of the mitochondria and capillaries with altered endothelial structure were observed. Conclusions: The aberrant myofibrillar structure might correspond to the moth-eaten and the ragged-red fibres seen in light microscopy. The capillary changes could be related to disturbances in muscle microcirculation.

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Changes in Trapezius Muscle Structure in Fibromyalgia and Chronic Trapezius Myalgia

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Changes in Trapezius Muscle Structure in Fibromyalgia and Chronic Trapezius Myalgia

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