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Related Concept Videos

Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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Satellite Stem Cells and Muscular Dystrophy01:21

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Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
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Skeletal Muscle Anatomy00:55

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Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
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Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
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Muscle Pathology in Free-Ranging Stranded Cetaceans.

E Sierra1, A Espinosa de Los Monteros1, A Fernández1

  • 11 Department of Veterinary Pathology, Institute for Animal Health, Veterinary School, University of Las Palmas de Gran Canaria, Arucas, Spain.

Veterinary Pathology
|August 20, 2016
PubMed
Summary
This summary is machine-generated.

Skeletal muscle lesions are common in cetaceans, with 91.5% of examined animals showing changes like degeneration and atrophy. Researchers recommend routine muscle sampling in stranded cetaceans for better health insights.

Keywords:
SarcocystisToxoplasmaatrophycetaceanschronic myopathic changesdegenerative changeshypertrophymyositisskeletal muscle

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Area of Science:

  • Veterinary Pathology
  • Marine Mammal Science
  • Comparative Myology

Background:

  • Skeletal muscle disorders can significantly impair marine mammal function.
  • Such conditions are infrequently documented in cetaceans.
  • Understanding muscle pathology is crucial for assessing cetacean health.

Purpose of the Study:

  • To investigate the prevalence and types of skeletal muscle lesions in odontocetes and mysticetes.
  • To establish the diagnostic value of skeletal muscle examination in stranded cetaceans.

Main Methods:

  • Macroscopic evaluation of epaxial muscle mass in 153 cetaceans across 19 species.
  • Histological examination of the longissimus dorsi muscle.
  • Analysis of macroscopic and microscopic findings.

Main Results:

  • Macroscopic findings were limited to muscle atrophy in emaciated individuals.
  • Histopathology revealed significant lesions in 91.5% of cases.
  • Common lesions included degenerative changes (75.2%), atrophy (37.9%), chronic myopathic changes (25.5%), parasitic infestation (9.2%), and myositis (1.9%).

Conclusions:

  • Skeletal muscle lesions are highly prevalent in stranded cetaceans.
  • Histopathological examination of skeletal muscle provides valuable diagnostic information.
  • Systematic muscle sampling during necropsy is recommended for all stranded cetaceans.