Related Experiment Video
Updated: May 1, 2026

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
Published on: February 10, 2015
Reflections on acromio-clavicular dislocations
1Department of Orthopedic and Rehabilitation University of Miami, Florida, USA.
Abstract:
A number of surgical and nonsurgical techniques have been used in the recent past for the treatment of this not uncommon traumatic condition. Thus far, no agreement has been reached regarding the method most likely to consistently render good results. Uppermost in determining the treatment has been the degree of displacement of the clavicle and the prevention of possible cosmetically unacceptable complications. Advances in the surgical care of most fractures and dislocations have lead to the current belief and practice among the majority of orthopaedic surgeons that every effort should be made to correct any deviation from the normal produced by the injury. I submit that skilful neglect and acceptance of acromio-clavicular dislocation is an option worth considering. When the dislocation is accepted, the vast majority of patients do well, functionally and aesthetically. Chronic pain is an extremely rare situation; and the resulting deformity, from the cosmetic point of view, an uncommon problem. If this is the case, what is the problem that reconstructive surgery proposes to address?
Related Concept Videos
Muscles of the Shoulder
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Muscles that Move the Arm
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
Flail Chest-I
Flail chest is a severe and potentially life-threatening condition characterized by the fracture of three or more adjacent ribs in multiple places. It is most commonly caused by direct impacts and trauma, such as motor vehicle accidents or injuries from a steering wheel impact. It can also occur due to falls in elderly individuals with osteoporosis, or assaults involving sharp objects.
Pathophysiology
The pathophysiology of flail chest is complex, involving fractures of...
Flail Chest-II
Assessment:
1. Clinical Evaluation:
History:
Articulations of the Vertebral Column
Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An...

