Muscle Damage
Muscle Damage - Related Videos
08:33
Induction and Assessment of Exertional Skeletal Muscle Damage in Humans
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Cited by 8 •
2016
This article describes a safe and reliable method to induce and quantify exertional skeletal muscle damage in human subjects.
07:29
Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage
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Cited by 1 •
2022
The present protocol describes a unique technique called dosage-adjusted resistance training (DART), which can be incorporated into precision rehabilitation studies performed in small animals, such as mice.
09:54
Detection and Analysis of DNA Damage in Mouse Skeletal Muscle In Situ Using the TUNEL Method
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Cited by 24 •
2014
This video describes dissection, tissue processing, sectioning, and fluorescence-based TUNEL labeling of mouse skeletal muscle. It also describes a method for semi-automated analysis of TUNEL labeling.
14:02
Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles
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Cited by 53 •
2012
We describe a method to directly measure muscle force, muscle power, contractile kinetics and fatigability of isolated skeletal muscles in an in vitro system using field stimulation. Valuable information on Ca2+ handling properties and contractile machinery of the muscle can be obtained using different stimulating protocols.
14:36
Evaluation of Muscle Function of the Extensor Digitorum Longus Muscle Ex vivo and Tibialis Anterior Muscle In situ in Mice
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Cited by 75 •
2013
Changes in limb muscle contractile and passive mechanical properties are important biomarkers for muscle diseases. This manuscript describes physiological assays to measure these properties in the murine extensor digitorum longus and tibialis anterior muscles.
FAQs
When the muscle-cell membrane is disrupted, the cell can no longer regulate calcium normally. This disturbance affects the molecular processes required for contraction and allows intracellular proteins, including creatine kinase, to enter the bloodstream. These changes connect local structural injury with measurable laboratory findings and help explain why damaged muscle may lose normal strength and movement.
Calcium regulation links the integrity of a muscle fiber to its ability to contract. Membrane injury disrupts this control, impairing contraction rather than producing only a local structural problem. Assessing this mechanism helps clinicians and researchers interpret functional limitations and investigate how therapies might support restoration of muscle structure and performance.
Inflammation has a dual role after muscle injury. It supports tissue repair by responding to damaged fibers, but the same process can increase swelling and pain. This balance matters clinically because symptoms may reflect both the original structural disruption and the body’s repair response, influencing assessment, rehabilitation planning, and research into recovery-focused treatments.
Creatine kinase is an intracellular protein that can be released into the bloodstream when muscle-cell membranes are disrupted. Laboratory measurement therefore provides evidence of muscle injury that complements symptoms and physical examination. Clinicians can combine biomarker findings with imaging and other assessments to distinguish less severe strains from more serious injury, including rhabdomyolysis.
Evaluation combines the patient’s symptoms with a physical examination, laboratory biomarkers, and imaging when appropriate. This multimodal approach helps distinguish a minor strain from more severe injury or rhabdomyolysis. The findings also provide a basis for judging functional impact, identifying possible systemic complications, and selecting suitable treatment and rehabilitation strategies.
Rhabdomyolysis becomes an important clinical distinction when findings suggest muscle injury may be severe rather than limited to a minor strain. Clinicians use symptoms, examination, laboratory biomarkers, and imaging to support this distinction and to recognize possible systemic complications. Accurate classification is relevant because it guides monitoring, treatment decisions, and prevention of further harm.
Understanding membrane injury, calcium dysregulation, creatine kinase release, and inflammation gives medicine several clinically useful targets. These mechanisms support assessment of severity, planning of rehabilitation to address impaired movement, and prevention of complications. They also guide research into therapies designed to restore muscle structure and function after injury, disease, excessive strain, or impaired blood supply.