 It does not properly belong to the acromioclavicular joint articulation, but is usually described with it, since it forms a most efficient means of retaining the clavicle in contact with the acromion.It consists of two fasciculi, called the trapezoid ligament and conoid ligament.These ligaments are in relation, in front, with the Subclavius and Deltoideus; behind, with the Trapezius.