The muscles of the right and left sides of the body have many names in the medical literature. I would like to dwell in more detail on the name assigned to the erector spinae muscle - M. SemispinaIS dORSI, BNA (Bony Name Assignment). The name used in anatomy would be pronounced "M. semisPINalis dorsi" in Latin (which means "half-folded back"), but in medical documents the abbreviation "SD" is usually used. In addition, myological studies indicate that the name of the muscle in Latin is a compound word (for example, "