Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of AC joint
Medically reviewed by Min Clinic Staff | Updated: January 2026
AC joint: Acromioclavicular joint located between the acromion (a projection of the scapula that forms the point of the shoulder) and the clavicle (the collar bone). This is a gliding type of joint.
The ligaments that serve to support and strengthen this joint are called the capsular; superior and inferior acromioclavicular; articular disk; and coracoclavicular (trapezoid and conoid) ligaments.