The term "plexus coronarius posterior" refers to a network of nerves located in the heart. It is responsible for supplying the posterior region of the coronary sinus. Alternative synonyms for this anatomical structure include "posterior coronary plexus" or "posterior cardiac plexus". These terms can be used interchangeably to describe the same nerve network located at the back of the heart. In medical literature or discussions, using synonyms like "posterior cardiac plexus" can help enhance clarity and facilitate better understanding among healthcare professionals and researchers. Therefore, it is essential to be familiar with these synonyms when studying or discussing this aspect of cardiac anatomy.