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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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Myocarditis I: Introduction01:21

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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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Myasthenia Gravis: Overview and Treatment01:20

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Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which...
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Myasthenia Gravis: Diagnostic Tests01:15

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Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
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Formation of Muscle Fibers from Myoblasts01:13

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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.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
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Angina I: Introduction01:30

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Definition and Symptoms: Angina (angina pectoris) is chest pain or discomfort caused by myocardial ischemia, which occurs when the heart muscle receives insufficient oxygen-rich blood. It typically manifests as pressing, squeezing, or crushing sensations in the chest and may radiate to the shoulders, arms, neck, jaw, or back.Primary Cause: In a healthy state, the coronary arteries can dilate (widen) to increase blood flow and meet the increased oxygen demand during physical activity or...
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这是一种肌痛! 它来自哪里?

Hsun-Hua Lee1, Chih-Cheng Chen2

  • 1Department of Neurology, Taipei Medical University Hospital, Taipei Medical University, Taipei 11031, Taiwan; Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; Dizziness and Balance Disorder Center, Taipei Medical University Hospital, Taipei Medical University, Taipei City, 11031, Taiwan; Department of Neurology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan; Dizziness and Balance Disorder Center, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan.

Acta neurologica Taiwanica
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概括
此摘要是机器生成的。

肌肉疼痛,或肌痛,影响大多数人. 这项研究探讨了肌肉神经中的酸信号和氧化应激如何导致慢性疼痛,这可能导致新的纤维肌痛治疗方法.

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科学领域:

  • 神经科学是一个神经科学.
  • 疼痛研究 疼痛研究
  • 分子生物学分子生物学

背景情况:

  • 肌痛或肌肉疼痛是一种普遍的症状,影响60-85%的人口,通常与纤维肌痛等疾病有关.
  • 目前对慢性肌痛的理解是有限的,对于难以治疗的病例缺乏有效的治疗方法.
  • 组织酸化是已知的肌肉疼痛的贡献者,激活 nociceptors 中的质子感应离子通道.

研究的目的:

  • 为了研究酸信号在肌肉 afferents的整合.
  • 阐明慢性和难以治疗的肌肉疼痛背后的机制,特别是在纤维肌痛模型中.
  • 探索氧化应激在激活质子感应离子通道和诱导疼痛中的作用.

主要方法:

  • 使用了纤维肌痛的小鼠模型.
  • 研究了肌肉 afferents 的酸信号通路.
  • 研究了质子感应离子通道和氧化应激在疼痛诱导中的作用.

主要成果:

  • 肌肉 afferents中的酸信号可以是亲nociceptive和反nociceptive,一个现象称为"sngception".
  • 质子感应离子通道和受体在各种体感神经元子群体中表达.
  • 氧化应激被确定为激活质子感应离子通道的因素,在小鼠中触发纤维肌痛类似的疼痛.

结论:

  • 了解肌肉 afferents中的酸信号对于开发肌痛治疗的新治疗策略至关重要.
  • 准质子感应离子通道和解决氧化应激可能为治疗慢性肌肉疼痛疾病 (如纤维肌痛) 提供新的途径.