Acromioclavicular ligament

Acromioclavicular ligament
The left shoulder including the acromioclavicular joint and the proper ligaments of the scapula.
Details
From	Acromion
To	Clavicle
Identifiers
Latin	Ligamentum acromioclaviculare
TA98	A03.5.03.002
TA2	1745
FMA	26026
Anatomical terminology

The acromioclavicular ligament is part of the acromioclavicular joint. It is divided into two parts: superior and inferior.

Superior acromioclavicular ligament

This ligament is a quadrilateral band, covering the superior part of the articulation, and extending between the upper part of the lateral end of the clavicle and the adjoining part of the upper surface of the acromion.

It is composed of parallel fibers, which interlace with the aponeuroses of the trapezius and deltoideus; below, it is in contact with the articular disk when this is present.

This ligament provides horizontal stability to the acromioclavicular joint

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.

References

This article incorporates text in the public domain from page 315 of the 20th edition of Gray's Anatomy (1918)

External links

• Anatomy figure: 10:02-01 at Human Anatomy Online, SUNY Downstate Medical Center