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

7. The Skeletal System

The Pectoral Girdle

Anatomy & Physiology

7. The Skeletal System

The Pectoral Girdle

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3:16 minutes

Problem 19

Textbook Question

Why would a self-defense instructor advise a student to strike an attacker’s clavicle?

Verified step by step guidance

Understand the anatomical location and structure of the clavicle: The clavicle, or collarbone, is a long, slender bone located horizontally between the sternum (breastbone) and the scapula (shoulder blade). It is relatively superficial, meaning it is close to the surface of the skin and not protected by thick layers of muscle or fat.

Recognize the vulnerability of the clavicle: Due to its thin structure and exposed position, the clavicle is prone to fractures or damage when subjected to force. Striking this area can cause significant pain, disrupt arm movement, and potentially incapacitate an attacker.

Consider the physiological impact of striking the clavicle: A forceful strike to the clavicle can affect nearby structures, such as nerves (e.g., the brachial plexus) and blood vessels. This can lead to temporary numbness, weakness, or pain in the arm, further reducing the attacker’s ability to retaliate.

Evaluate the biomechanics of a strike: A self-defense instructor may recommend targeting the clavicle because it is an accessible and effective area to strike, especially for individuals who may lack the strength to overpower an attacker. The goal is to use leverage and precision rather than brute force.

Understand the ethical and safety considerations: While striking the clavicle can be effective in self-defense, it is important to emphasize that such techniques should only be used in situations where personal safety is at risk. The instructor would likely advise students to avoid causing unnecessary harm and to prioritize escaping the situation safely.

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Key Concepts

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

Anatomy of the Clavicle

The clavicle, or collarbone, is a long bone that connects the arm to the body. It is located at the base of the neck and is relatively superficial, making it vulnerable to strikes. Understanding its location and function is crucial for self-defense, as targeting this area can disrupt an attacker's balance and mobility.

Targeting Vulnerable Areas

In self-defense, striking vulnerable areas of the body can maximize the effectiveness of an attack. The clavicle is a key target because a well-placed strike can cause significant pain and incapacitation, allowing the defender to escape. This principle emphasizes the importance of precision over brute force in self-defense situations.

Self-Defense Principles

Self-defense principles focus on using reasonable force to protect oneself from harm. Instructors teach students to target specific areas that can neutralize a threat quickly and effectively. Advising a student to strike the clavicle aligns with these principles, as it provides a strategic advantage in a potentially dangerous encounter.

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Related Practice

Multiple Choice

The pectoral girdle does NOT quite satisfy the features of a true girdle because __________.

In the following photographs of the scapula, identify the three views (a–c) and the indicated bone markings (d–g).

<IMAGE>

a. ___

b. ___

c. ___

d. ___

e. ___

f. ___

g.___

Which of the following is primarily responsible for stabilizing, positioning, and bracing the pectoral girdle?

(a) Tendons

(b) Ligaments

(d) Muscles

(e) The shape of the bones within the joint

Name the bones of the shoulder girdle.

While fireman Fred is fighting a fire in a building, part of the ceiling collapses, and a beam strikes him on his left shoulder. He is rescued, but has a great deal of pain in his shoulder. He cannot move his arm properly, especially in the anterior direction. His clavicle is not broken, and his humerus is intact. What is the probable nature of Fred’s injury?

At work, a box fell from a shelf onto Ella's acromial region. In the emergency room, the physician felt that the head of her humerus had moved into the axilla. What had happened to Ella?

In anatomical position, the ulna lies:

(a) Medial to the radius

(b) Lateral to the radius

(d) Superior to the radius