articularis cubiti muscle articularis cubiti muscle the articularis cubiti muscle is a muscle of the elbow. articularis cubiti muscletriceps brachiidetailsorigindeep distal surface of medial head of tricepsinsertionposterior capsule of elbow jointarterydeep artery of armnerveradial nerveactionslifts capsule away from jointidentifierslatinmusculus articularis cubiti.ta98a04.6.02.024ta22475fma37701anatomical terms of muscle it is considered by some sources to be a part of the triceps brachii muscle. it is also known as the "subanconeus muscle", for its relationship to the anconeus muscle. it is classified as a muscle of the posterior brachium.