Clavicle Flashcards Preview

ESA 2- Musculoskeletal System > Clavicle > Flashcards

Flashcards in Clavicle Deck (30)
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1
Q

What is the clavicle also known as?

A

The collarbone

2
Q

Where does the clavicle extend?

A

Between the sternum and acromion of the scapula

3
Q

What is the clavicle classes as?

A

A long bone

4
Q

Where can the clavicle be palpated?

A

Along its length

5
Q

What are the main functions of the clavicle?

A

Attaches upper limb to trunk
Protects underlying neurovascular structures supplying the upper limb
Transmits force from the upper limb to the axial skeleton

6
Q

What shape is the clavicle?

A

Slender bone with an S shape, with the medial aspect being convex, and the lateral aspect being concave

7
Q

What can the clavicle be divided into?

A

Into a sternal end, a shaft, and an acromial end

8
Q

What does the sternal end of the clavicle contain?

A

A large facet

9
Q

What is the large facet of the clavicle for?

A

Articulation with the manubrium of the sternum at the sternoclavicular joint

10
Q

What marks the inferior surface of the sternal end of the clavicle?

A

A rough oval depression for the costoclavicular ligament

11
Q

What is the costoclavicular ligament?

A

A ligament of the SC joint

12
Q

What does the shaft of the clavicle act as?

A

A point of origin and attachment for several muscles

13
Q

What muscles is the shaft the site of attachment for?

A
Deltoid
 Trapezius
 Subclavius
 Pectoralis major
 Sternocleidomastoid
 Sternohyoid
14
Q

What does the acromial (lateral) end of the sternum house?

A

A small facet for articulation with the acromion of the scapula

15
Q

Where does the acromion articulate with the scapula?

A

At the acromioclavicular joint

16
Q

Where on the acromial end of the clavicle do things attach?

A

The conoid tubercle

The trapezoid line

17
Q

What is the purpose of the conoid tubercle?

A

Attachment point of the conoid ligament

18
Q

What is the conoid ligament?

A

The medial part of the coracoclavicular ligament

19
Q

What is the purpose of the trapezoid line?

A

Attachment point of the trapezoid ligament

20
Q

What is the trapezoid ligament?

A

The lateral part of the coracoclavicular ligament

21
Q

What is the coracoclavicular ligament?

A

A very strong structure that effectively suspends the weight of the upper limb from the clavicle

22
Q

What is the function of the clavicle?

A

To transmit force from the upper limb to the axial skeleton

23
Q

What is the result of the clavicles function?

A

It is the most commonly fractured bone in the body

24
Q

How do fractures of the clavicle commonly result?

A

From a fall onto the shoulder, or onto an outstretched hand

25
Q

What is the most common point of fracture on the clavicle?

A

The junction of the medial 2/3 and lateral 1/3

26
Q

What happens after fracture of the junction of the medial 2/3 and lateral 1/3?

A

The lateral end is displaced inferiorly by the weight of hte arm, and medially by the pectoralis major. The medial end is pulled superiorly, by the sternoclediomastoid muscle

27
Q

What can be damaged in a clavicle fracture?

A

The suprascapular nerve (medial, intermedial and lateral)

28
Q

How can the suprascapular nerves be damaged in a clavicle fracture?

A

By the upwards movement of the medial part of the fracture

29
Q

What do the suprascapular nerves do?

A

Innervate the lateral rotators of the upper limb at the shoulder

30
Q

What does damage to the suprascapular result in?

A

Unopposed medial rotation of the upper limb