Clavicle Flashcards Preview

ESA 2- Musculoskeletal System > Clavicle > Flashcards

Flashcards in Clavicle Deck (30):
1

What is the clavicle also known as?

The collarbone

2

Where does the clavicle extend?

Between the sternum and acromion of the scapula

3

What is the clavicle classes as?

A long bone

4

Where can the clavicle be palpated?

Along its length

5

What are the main functions of the clavicle?

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

6

What shape is the clavicle?

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

7

What can the clavicle be divided into?

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

8

What does the sternal end of the clavicle contain?

A large facet

9

What is the large facet of the clavicle for?

Articulation with the manubrium of the sternum at the sternoclavicular joint

10

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

A rough oval depression for the costoclavicular ligament

11

What is the costoclavicular ligament?

A ligament of the SC joint

12

What does the shaft of the clavicle act as?

A point of origin and attachment for several muscles

13

What muscles is the shaft the site of attachment for?

Deltoid 
Trapezius 
Subclavius 
Pectoralis major 
Sternocleidomastoid
Sternohyoid

14

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

A small facet for articulation with the acromion of the scapula

15

Where does the acromion articulate with the scapula?

At the acromioclavicular joint

16

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

The conoid tubercle 
The trapezoid line

17

What is the purpose of the conoid tubercle?

Attachment point of the conoid ligament

18

What is the conoid ligament?

The medial part of the coracoclavicular ligament

19

What is the purpose of the trapezoid line?

Attachment point of the trapezoid ligament

20

What is the trapezoid ligament?

The lateral part of the coracoclavicular ligament

21

What is the coracoclavicular ligament?

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

22

What is the function of the clavicle?

To transmit force from the upper limb to the axial skeleton

23

What is the result of the clavicles function?

It is the most commonly fractured bone in the body

24

How do fractures of the clavicle commonly result?

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

25

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

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

26

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

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

What can be damaged in a clavicle fracture?

The suprascapular nerve (medial, intermedial and lateral)

28

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

By the upwards movement of the medial part of the fracture

29

What do the suprascapular nerves do?

Innervate the lateral rotators of the upper limb at the shoulder

30

What does damage to the suprascapular result in?

Unopposed medial rotation of the upper limb