The Brachial Plexus is responsible for cutaneous and muscular innervation of the entire upper limb. It is an arrangement of the anterior roots from above the fifth cervical vertebra to underneath the first thoracic vertebra (C5T1) which gather in trunks and divisions to originated five main peripheral nerves. The deep anatomical knowledge of the plexus supports the identification of anatomical variation and alterations. Although this issue has been focus of some prior publications it is difficult to compare these because of the diversity of nomenclature used. Therefore, the objective of this revision article is to show the anatomical description of the Brachial Plexus based on international nomenclature. Classic text books and media sources (journal and databases) were contrasted and analyzed. This survey offers important information to students and health professionals who are interesting in diagnosis and rehabilitation of Brachial Plexus injuries. Salud UIS 2008; 40: 101-109