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Questions and Answers
The clavicle is identical on both the left and right sides, with no differences in length or shape.
The clavicle is identical on both the left and right sides, with no differences in length or shape.
False
The clavicle plays a crucial role in shoulder movement by primarily providing attachment points for muscles.
The clavicle plays a crucial role in shoulder movement by primarily providing attachment points for muscles.
False
Common injuries to the clavicle primarily include dislocations rather than fractures.
Common injuries to the clavicle primarily include dislocations rather than fractures.
False
The blood supply to the clavicle comes from the internal thoracic artery and external thoracic artery.
The blood supply to the clavicle comes from the internal thoracic artery and external thoracic artery.
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Malunion and nonunion are complications that can arise from a clavicle fracture.
Malunion and nonunion are complications that can arise from a clavicle fracture.
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Study Notes
Clavicle Anatomy and Function
- The clavicle, or collarbone, acts as a strut, holding the scapula (shoulder blade) in place, allowing for free arm movement.
- It also provides attachment points for muscles that move the shoulder and arm.
- Key bony landmarks include the sternal end (articulates with the sternum), acromial end (articulates with the scapula), and the shaft.
- The clavicle's structure enables a wide range of shoulder motion and stability.
Clavicle Structure
- The clavicle comprises three main parts: the sternal end, the acromial end, and the shaft.
- The sternal end connects to the manubrium of the sternum.
- The acromial end connects to the acromion of the scapula.
Clavicle Injuries and Treatment
- Common injuries include fractures, often treated with rest, immobilization, and sometimes surgery.
- Dislocations, less frequent, usually stem from forceful trauma.
- Malunion (improper healing) from fractures can lead to shoulder problems.
- Delayed or non-union of the fracture can cause chronic pain and disability.
Clavicle Blood Supply and Innervation
- Blood supply comes from the internal thoracic artery and the external thoracic artery.
- Innervation is via the supraclavicular nerve, a branch of the cervical plexus.
Clavicle Differences and Diseases
- Left and right clavicles differ slightly in length, shape (S-shaped vs. U-shaped), and curvature.
- The left clavicle is generally longer and more S-shaped than the right.
- Common diseases include fractures, dislocations, clavicular nonunion, and acromioclavicular joint osteoarthritis.
Clavicle-Attached Muscles
- Muscles attached to the clavicle include the sternocleidomastoid, trapezius, deltoid, supraspinatus, and infraspinatus.
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Description
This quiz explores the anatomy and function of the clavicle, also known as the collarbone. You'll learn about its structure, important landmarks, and common injuries along with their treatment. Test your knowledge on how the clavicle contributes to shoulder movement and stability.
