Structural and functional changes in skeletal muscle in anorexia nervosa

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ID: 116950
1970
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Abstract
Protein-energy malnutrition in anorexia nervosa is an under-recognised cause of muscle dysfunction. To characterise the skeletal myopathy that occurs in patients with severe anorexia nervosa, muscle function and structure were comprehensively examined in eight young adult female patients with severe (40%) self-induced weight loss. All of the patients showed impaired muscle function on strength and exercise measurement. The maximum voluntary contraction force for the patient group was significantly less than predicted values. Electromyography revealed myopathy in five of the patients, four of whom also had electro-physiological evidence of neuropathy. However, muscle biopsy specimens consistently showed myopathic changes with severe type 2 fibre atrophy but with no evidence of neuropathic changes. Ultrastructurally, there was separation and segmental loss of myofibrils and most biopsy samples contained abundant glycogen granules; we have previously reported that one of the most consistent biochemical abnormalities in these patients is impaired ischaemic lactate responses to forearm exercise. The result of severe protein-energy malnutrition on the musculo-skeletal system is a metabolic myopathy. Although the patients admitted to a variety of abnormal dieting behaviours, such as over-exercising and self-induced vomiting, no association was found between any of these and quantitative histological changes in the muscle biopsy samples. It is recommended that myopathy in anorexia nervosa be treated by instituting an appropriate refeeding programme.
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mcloughlin1970actastructural Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Declan M. McLoughlin;Edward Spargo;Wassif S. Wassif;Diane J. Newham;Timothy J. Peters;Peter L. Lantos;Gerald F. M. Russell;Declan M. McLoughlin;Edward Spargo;Wassif S. Wassif;Diane J. Newham;Timothy J. Peters;Peter L. Lantos;Gerald F. M. Russell;
Journal acta neuropathologica
Year 1970
DOI
doi:10.1007/s004010050850
URL
https://link.springer.com/article/10.1007/s004010050850
Keywords
pathology neurosciences

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