Lecture 6 Anatomy of the Shoulder and Elbow

Question 1

Name the 4 rotator cuff muscles

Answer 1

• Supraspinatus
• Infraspinatus
• Teres minor
• Subscapularis

Question 2

Name the 4 dorsal muscles

Answer 2

Trapezius
Latissimus dorsi
Rhomboids
Levator scapulae

Question 3

What are the main actions of the trapezius muscle

Answer 3

Elevates, retracts and rotates scapula

Question 4

What are the main actions of latissimus dorsi

Answer 4

Extends, adducts and medially rotates humerus at shoulder

Question 5

What are the main actions of the elevator scapulae

Answer 5

Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

Question 6

What are the main actions of the Rhomboid minor and major

Answer 6

Retracts scapula and rotates it to depress glenoid cavity

Question 7

What are the main actions of the Supraspinatus

Answer 7

Initiates arm abduction and acts with rotator cuff muscles

Question 8

What are the main actions of the infraspinous

Answer 8

Laterally rotates arm at shoulder , helps hold head in glenoid cavity

Question 9

What are the main actions of the teres minor

Answer 9

Extends arm and medially rotates shoulder

Question 10

What are the main actions of the subscapularis

Answer 10

Medially rotates arm at shoulder and adducts it; helps hold humeral head in glenoid cavity