Skeletal Muscle Injury
Skeletal Muscle Injury - Related Videos
07:13
Laser-inflicted Injury of Zebrafish Embryonic Skeletal Muscle
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Cited by 14 •
2013
The method presented here comprises the precise injury of live zebrafish embryos with high-energy laser pulses and the subsequent analysis of these injuries and their recovery with time. We also show how genetically labeled single or groups of skeletal muscle cells can be tracked during and after laser light induced damage.
09:14
Evaluation of Injury-induced Senescence and In Vivo Reprogramming in the Skeletal Muscle
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Cited by 14 •
2017
Here we present a detailed protocol to detect both senescent and pluripotent stem cells in the skeletal muscle upon injury while inducing in vivo reprogramming. This method is suitable for evaluating the role of cellular senescence during tissue regeneration and reprogramming in vivo.
09:45
Mitochondrial Isolation from Skeletal Muscle
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Cited by 47 •
2011
This protocol describes a procedure to study the respiration of mitochondria isolated from skeletal muscles. This method was adapted from Scorrano et al. (2007). The mitochondrial isolation procedure requires about 2 hours. The mitochondrial respiration can be completed in about 1 hour.
14:36
Adult and Embryonic Skeletal Muscle Microexplant Culture and Isolation of Skeletal Muscle Stem Cells
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Cited by 6 •
2010
The micro-dissected explants technique is a robust and reliable method for isolating proliferative skeletal muscle cells from juvenile, adult or embryonic muscles as a source of skeletal muscle stem cells. Uniquely, these cells have been clonally derived to produce skeletal muscle stem cell lines used for in vivo transplantation.
01:48
Classification of Skeletal Muscle Fibers
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2019
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions. Slow-Twitch Muscle Fibers Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
FAQs
Damage can disrupt sarcomeres, the organized contractile units that generate force, and may also compromise the muscle-cell membrane. These changes disturb calcium balance, which is important for contraction and cellular signaling, while inflammation develops around the damaged area. Together, these processes help explain reduced force production and impaired movement during recovery.
Satellite cells remain near muscle fibers and become activated after damage. They proliferate, or increase in number, and then differentiate into cells that support regeneration of the affected tissue. This response can help restore muscle structure and function, but repeated or persistent injury may instead favor fibrosis, in which scar-forming tissue replaces or disrupts normal muscle.
When damage continues rather than resolving, repair may become associated with excessive scar formation. Fibrosis alters the tissue environment around muscle fibers and can interfere with normal regeneration and force production. This outcome contrasts with a regenerative response supported by activated satellite cells, making the duration and recurrence of injury important biological factors.
These causes represent different sources of tissue stress, but the resulting biological response can include overlapping changes such as sarcomere disruption, membrane damage, calcium imbalance, and inflammation. Comparing their effects allows researchers to distinguish the initiating cause from the shared cellular mechanisms that impair muscle performance and influence subsequent repair.
It connects muscle structure with function by showing how damage to contractile organization and cellular membranes affects force production and movement. Examining inflammation, calcium imbalance, satellite-cell activity, and fibrosis also clarifies how muscle responds after damage. These insights support broader understanding of tissue repair, regeneration, and the limits of functional recovery.
Research on the cellular and tissue responses provides a biological basis for understanding impaired muscle function after damage. Knowledge of sarcomere disruption, inflammation, satellite-cell activity, and fibrosis can inform how clinicians and scientists interpret recovery and design rehabilitation strategies. The same research may guide efforts to restore movement and force production more effectively.