Brachial plexus: overview (Latin)

The plexus brachialis is formed by the five ventral rami (radices) that originate from the nervi spinales C5-T1 (radices plexus brachialis). These radices rami merge to form three trunci, the truncus superior (C5-6), truncus medius (C7) and truncus inferior (C8-T1). Each trunk then divides into an anterior and posterior division, therefore forming six divisions altogether. These six divisions then reform, resulting in three fasciculi: fasciculus posterior, fasciculus lateralis and fasciculus medialis.