Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

8. Joints

Introduction to Joints

Anatomy & Physiology

8. Joints

Introduction to Joints

Previous problemNext problem

Problem 23

Textbook Question

Partial or complete dislocation of the acromioclavicular joint is called a(n)___ .

Verified step by step guidance

Understand the anatomy of the acromioclavicular (AC) joint: The AC joint is located at the top of the shoulder where the acromion (part of the scapula) meets the clavicle. It is stabilized by ligaments such as the acromioclavicular ligament and the coracoclavicular ligament.

Recognize the term 'dislocation': A dislocation refers to the displacement of bones at a joint, which can be partial (subluxation) or complete. This typically results from trauma or injury.

Learn the specific term for dislocation of the AC joint: The partial or complete dislocation of the AC joint is commonly referred to as an 'AC joint separation.' This injury often occurs due to a fall or direct impact to the shoulder.

Understand the grading of AC joint separation: AC joint separations are classified into grades (I to VI) based on the severity of ligament damage and displacement of the clavicle. This classification helps guide treatment decisions.

Review symptoms and treatment: Symptoms of AC joint separation include pain, swelling, and visible deformity at the shoulder. Treatment ranges from rest and physical therapy for mild cases to surgical intervention for severe separations.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Acromioclavicular Joint

The acromioclavicular (AC) joint is a critical joint in the shoulder that connects the acromion of the scapula to the clavicle. It plays a vital role in shoulder movement and stability, allowing for a range of motions such as raising the arm. Understanding the anatomy and function of the AC joint is essential for diagnosing injuries related to it.

Dislocation

A dislocation occurs when the bones in a joint are forced out of their normal positions. In the context of the acromioclavicular joint, a dislocation can result from trauma or injury, leading to pain, swelling, and limited mobility. Recognizing the signs and symptoms of a dislocation is crucial for appropriate treatment and management.

Types of AC Joint Injuries

AC joint injuries are classified into different types based on the severity of the dislocation, ranging from mild sprains to complete dislocations. The most common classification system is the Rockwood classification, which helps in determining the treatment approach. Understanding these types is important for effective diagnosis and rehabilitation strategies.

Watch next

Master Introduction to Joints with a bite sized video explanation from Bruce Bryan

Start learning