Laura García-Orozco; Jhonatan Duque-Colorado; Josefa Alarcón-Apablaza; Ignacio Roa & Mariana Rojas

The different embryological origins of striated muscle tissue make it an interesting tissue but at the same time difficult to understand, this is how the musculature of the face comes from the first pharyngeal arch, on the other hand. The muscles of the tongue derive from the somites. The muscles of the larynx come from the pharyngeal arches. The muscles of the spine come from the medial or internal myotome of the somite, while the muscles of the limbs and body wall come from the external myotome. The cardiac musculature originates from the lateral splanchnic mesoderm. In this work, the development of myoblasts in human, mouse and chicken fetuses was studied in the facial region, tongue, and spine, limbs, body wall and cardiac muscles using histological histochemical techniques and immunohistochemical technique. The objective of the work is to compare the histogenesis of striated muscle (skeletal, visceral and cardiac), indicating the differences in origin, evolution of the morphological characteristics in each of them and the signaling routes that are involved in its development.

KEY WORDS: Skeletal striated muscles; Visceral striated muscles; Somites; Myoblasts, Mesoderm; Myotome; Myocytes; Cardiac muscle.

GARCÍA-OROZCO, L.; DUQUE-COLORADO, J.; ALARCÓN-APABLAZA, J.; ROA, I. & ROJAS, M. Striated musculature: Embryonic and fetal development. Int. J. Morphol., 42(2):341-347, 2024.