myoblastum
Myoblastum is a term sometimes encountered in embryology and developmental biology to denote an early muscle-forming progenitor cell in skeletal muscle development. It is intended to describe a transitional stage between mesodermal progenitors and fully committed myoblasts. However, myoblastum is not part of the standard modern nomenclature; most contemporary texts use myoblasts to refer to proliferating muscle precursor cells that fuse to form myotubes.
Myoblastum is said to originate from the somite-derived paraxial mesoderm, appearing during early phases of myogenesis.
In the developmental sequence, cells designated as myoblastum would proliferate, align along the presumptive muscle fibers,
Despite occasional usage, the term myoblastum has limited acceptance and is largely historical or theoretical. Contemporary