Arteria Carpals is facility seen in Armored Core: For Answer and plays an important role in all three endings.
Run by Rosenthal, Arteria Carpals is one of the main Arteria facilities that support the Cradles. Because of this, it has high strategic value to both the League and ORCA, who attempt to take the facility. Depending on the path the player takes, Carpals is either captured by ORCA or is protected and remains in control of Rosenthal. If the player takes the Old King (Destruction) ending, Carpals becomes the ground for the ambush by the Four NEXTs.