This volume is a foundational treatise in human anatomy, authored by L. Testut, focusing specifically on myology and arthrology—the study of muscles and joints. Published in 1900, it reflects the rigorous descriptive approach of early modern anatomical science, combining detailed morphological analysis with systematic classification. As Volume I, it likely establishes essential knowledge for medical education, emphasizing structural relationships and functional implications. The work’s significance lies in its precision and pedagogical clarity, contributing to the development of anatomical science and serving as a reference for both historical and clinical perspectives.