Clavicle

Question 1

What is the clavicle also known as?

Answer 1

The collarbone

Question 2

Where does the clavicle extend?

Answer 2

Between the sternum and acromion of the scapula

Question 3

What is the clavicle classes as?

Answer 3

A long bone

Question 4

Where can the clavicle be palpated?

Answer 4

Along its length

Question 5

What are the main functions of the clavicle?

Answer 5

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

Question 6

What shape is the clavicle?

Answer 6

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

Question 7

What can the clavicle be divided into?

Answer 7

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

Question 8

What does the sternal end of the clavicle contain?

Answer 8

A large facet

Question 9

What is the large facet of the clavicle for?

Answer 9

Articulation with the manubrium of the sternum at the sternoclavicular joint

Question 10

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

Answer 10

A rough oval depression for the costoclavicular ligament

Question 11

What is the costoclavicular ligament?

Answer 11

A ligament of the SC joint

Question 12

What does the shaft of the clavicle act as?

Answer 12

A point of origin and attachment for several muscles

Question 13

What muscles is the shaft the site of attachment for?

Answer 13

Deltoid
 Trapezius
 Subclavius
 Pectoralis major
 Sternocleidomastoid
 Sternohyoid

Question 14

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

Answer 14

A small facet for articulation with the acromion of the scapula

Question 15

Where does the acromion articulate with the scapula?

Answer 15

At the acromioclavicular joint

Question 16

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

Answer 16

The conoid tubercle

The trapezoid line

Question 17

What is the purpose of the conoid tubercle?

Answer 17

Attachment point of the conoid ligament

Question 18

What is the conoid ligament?

Answer 18

The medial part of the coracoclavicular ligament

Question 19

What is the purpose of the trapezoid line?

Answer 19

Attachment point of the trapezoid ligament

Question 20

What is the trapezoid ligament?

Answer 20

The lateral part of the coracoclavicular ligament

Question 21

What is the coracoclavicular ligament?

Answer 21

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

Question 22

What is the function of the clavicle?

Answer 22

To transmit force from the upper limb to the axial skeleton

Question 23

What is the result of the clavicles function?

Answer 23

It is the most commonly fractured bone in the body

Question 24

How do fractures of the clavicle commonly result?

Answer 24

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

Question 25

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

Answer 25

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

Question 26

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

Answer 26

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

Question 27

What can be damaged in a clavicle fracture?

Answer 27

The suprascapular nerve (medial, intermedial and lateral)

Question 28

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

Answer 28

By the upwards movement of the medial part of the fracture

Question 29

What do the suprascapular nerves do?

Answer 29

Innervate the lateral rotators of the upper limb at the shoulder

Question 30

What does damage to the suprascapular result in?

Answer 30

Unopposed medial rotation of the upper limb