Week 3 Lecture 5 Appendicular skel I

Question 1

What does the clavicles (collarbones) do?

Answer 1

Acts as brace: holds scapula and arm laterally

Question 2

What are the Rotator cuff muscles?

Answer 2

Subscapularis
Suprasinatus
Infraspinatus
Teres Minor

Question 3

What does the Subscapularis muscle do?

Answer 3

Rotates humerus medially (endorotation)

Question 4

What does the Supraspinatus muscle do?

Answer 4

Abducts humerus

Question 5

What does the Infraspinatus muscle do?

Answer 5

Laterally rotates and adducts humerus (exorotation)

Question 6

What does the Teres Minor muscle do?

Answer 6

Laterally rotates and adducts humerus

Question 7

What are the joints of the upper limb/pectoral girdle?

Answer 7

Sternoclavicular
Acromioclavicular
Glenohumeral joint

Question 8

Whats special about the Shoulder (Glenohumeral) Joint?

Answer 8

The Stability is sacrificed for greater freedom of movement

Question 9

What does the bursa play in the (Glenohumeral) Joint?

Answer 9

It reduces friction between two body parts where there is no joint to stop the friction from happening

Question 10

When do dislocations occur?

Answer 10

When bones are forced out of alignment

Question 11

Whats a subluxation?

Answer 11

A partial dislocation of a joint (common in the spine)

Question 12

How many bones form the skeletal framework of each upper limb?

Answer 12

30 Bones

Question 13

What type of Synovial joint is the elbow?

Answer 13

Hinge joint

Question 14

Whats the Metacarpus?

Answer 14

Five metacarpal bones (#1 to #5) form the palm

Question 15

What percent of scaphoid fractures are carpel fractures?

Answer 15

60-70%