 Inferior Acromioclavicular Ligament
This ligament is somewhat thinner than the preceding; it covers the under part of the articulation, and is attached to the adjoining surfaces of the two bones.It is in relation, above, in rare cases with the articular disk; below, with the tendon of the Supraspinatus

The Coracoacromial Ligament is a strong triangular band, extending between the coracoid process and the acromion.It is attached, by its apex, to the summit of the acromion just in front of the articular surface for the clavicle; and by its broad base to the whole length of the lateral border of the coracoid process.