myogenic satellite cells
Undifferentiated skeletal muscle precursors called satellite cells reside underneath the basal lamina of skeletal myofibers and can be activated to proliferate, differentiate and fuse to form new muscle tissue. Satellite cells have long been considered promising mediators of therapeutic muscle regeneration.
References
Sherwood RI, Wagers AJ. Harnessing the potential of myogenic satellite cells. Trends Mol Med. 2006 May;12(5):189-92. PMID: 16595190