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Related Concept Videos

Disorders of the Skeletal Muscle01:28

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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Bone Formation by Endochondral Ossification01:24

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Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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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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Related Experiment Video

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Direct Mouse Trauma/Burn Model of Heterotopic Ossification
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Myositis Ossificans.

Christopher C Kaeding, William A Sanko, Richard A Fischer

    The Physician and Sportsmedicine
    |December 23, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Myositis ossificans, a complication of muscle contusion, requires early diagnosis for effective treatment and recovery. Despite initial symptoms, the long-term prognosis for this condition is excellent with proper management.

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    Area of Science:

    • Orthopedics
    • Sports Medicine
    • Radiology

    Background:

    • Myositis ossificans is a potential complication following muscle contusion.
    • It can lead to significant recovery time for athletes.
    • Early identification is crucial for optimal patient outcomes.

    Purpose of the Study:

    • To outline the key diagnostic features of myositis ossificans.
    • To emphasize the importance of early diagnosis and management.
    • To differentiate myositis ossificans from other bone pathologies.

    Main Methods:

    • Clinical presentation review including swelling, tenderness, erythema, and warmth.
    • Radiographic analysis noting typical negative X-ray findings in early stages (2-4 weeks post-injury).
    • Differential diagnosis considerations, particularly osteogenic sarcoma, based on history, location, and imaging.

    Main Results:

    • Typical findings include localized inflammation and pain.
    • Radiographs are often non-diagnostic in the initial 2-4 weeks.
    • History and radiographic appearance aid in distinguishing it from osteogenic sarcoma.

    Conclusions:

    • Myositis ossificans, while initially problematic, has an excellent long-term prognosis.
    • Prompt diagnosis facilitates appropriate treatment and prevents exacerbation.
    • Initial management involves RICE (Rest, Ice, Compression, Elevation) and anti-inflammatory medication, followed by physical therapy.