Acromio-clavicular

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by kenzcrawford4
Last updated 6 years ago

Discipline:
Science
Subject:
Human Anatomy

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Acromio-clavicular

Where is it?The acromio-clavicular joint is formed between the outer extremity of the clavicle and the inner margin of the acromion process of the scapula. It is often measured by a visible prominence and is a full inch medial to the tip of the shoulder, creating a bony hood over it.

Acromio-clavicular

Classification: gliding synovial joint

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Ligaments-Acromioclavicular: superior acromio-clavicular & inferior acromio-clavicular (form a complete capsule around the joint)- Interarticular fibro-cartilage (frequently absent)-Coracoacromial: connects cioracoid process and acromion- Coracoclavicular: conoid and trapezoid ligaments (joins clavicle and coracoid process, protecting the head of the humerus)

Acromion-clavicular Injuries-known as shoulder seperation (not shoulder dislocation)-common in collision sports-occurs most often when falling on the tip of the shoulder or on an out-strecthed hand-injuries are graded from I-V based on severity -only grades IV and V usually require surgury-physiotherapy is then usually required especially for those who are extremely active

Functions-allows for a gliding motion of the articular end of the clavicle on the acromion -aids other more prominent joints to provide scapular roation and full mobility of the shoulder -when the whole arch formed by the clavicle and scapula rises and falls (elevation and depression), the joint between the two bones is responsible for ensuring that the scapula maintians in contact with the ribs


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