Textbook Question
Which of the following bones or bone parts articulate with the femur?
a. Ischial tuberosity
b. Pubis
c. Patella
d. Fibula
e. Tibia
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8. Joints
Introduction to Joints
Problem 23
Textbook Question
Partial or complete dislocation of the acromioclavicular joint is called a(n)___ .
Verified step by step guidance1
Understand the anatomy involved: The acromioclavicular (AC) joint is the joint at the top of the shoulder where the acromion of the scapula meets the clavicle.
Recognize the type of injury described: A partial or complete dislocation of this joint involves the displacement of the clavicle relative to the acromion.
Recall the specific medical term used for this injury: It is commonly known as an 'AC joint separation' or 'acromioclavicular separation.'
Differentiate this from other shoulder injuries: Unlike a glenohumeral dislocation, this injury specifically affects the AC joint.
Conclude that the correct term to fill in the blank is 'acromioclavicular separation,' which describes the partial or complete dislocation of the AC joint.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Acromioclavicular Joint Anatomy
The acromioclavicular (AC) joint is the connection between the acromion of the scapula and the clavicle. It plays a key role in shoulder movement and stability, supported by ligaments such as the acromioclavicular and coracoclavicular ligaments.
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Dislocation Definition
Dislocation refers to the displacement of bones at a joint, where the normal alignment is lost. It can be partial (subluxation) or complete, often causing pain, swelling, and limited movement.
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Acromioclavicular Joint Dislocation (Shoulder Separation)
A partial or complete dislocation of the AC joint is commonly known as a shoulder separation. It results from trauma or injury, leading to ligament damage and displacement of the clavicle relative to the acromion.
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