A rerebrace (sometimes known as an upper cannon) is a piece of armour designed to protect the upper arms (above the elbow). Splint rerebraces were a feature of Byzantine armour in the Early Medieval period. The rerebrace seems to have re-emerged in England, in the early 14th century.) As part of the full plate armour of the Late Middle Ages and Renaissance the rerebrace was a tubular piece of armour between the shoulder defences (pauldron) and the elbow protection (couter).
^David Edge, John Miles Paddock (1993) . Arms & Armor of the Medieval Knight (Crescent Books reprint ed.). New York City: Crescent Books. pp. 79–80. ISBN0517103192.
^George Cameron Stone (1999) . A Glossary of the Construction, Decoration and Use of Arms and Armor in All Countries and in All Times (Dover Edition ed.). Mineola NY: Dover Publications. p. 526. ISBN0486407268.