SHOULDER EXTENSORS

Question 1

Shoulder Extensors:
Muscles Involved (4)

Answer 1

Latissimus Dorsi
Teres minor
Triceps brachii (Long Head)
Pectoralis Major

Question 2

O: Latissimus Dorsi

Answer 2

Iliac crest, lumbar fascia,
lower 6 thoracic vertebrae,
lower 4 ribs, inferior angle of
scapula

Question 3

I: Latissimus Dorsi

Answer 3

Floor of bicipital groove

Question 4

N: Latissimus Dorsi

Answer 4

Thoracodorsal

Question 4

A: Latissimus Dorsi

Answer 4

Extends, adducts, and internal
rotates the arm

Question 4

O: Teres minor

Answer 4

Upper 2/3 of lateral border of
scapula

Question 5

I: Teres minor

Answer 5

Greater tuberosity of humerus

Question 6

N: Teres minor

Answer 6

Axillary

Question 6

A: Teres minor

Answer 6

Externally rotates the arm

Question 7

O: Triceps brachii (Long Head)

Answer 7

Infraglenoid Tubercle of
scapula

Question 8

I: Triceps brachii (Long Head)

Answer 8

Olecranon process of the ulna

Question 8

N: Triceps brachii (Long Head)

Answer 8

Radial

Question 8

A: Triceps brachii (Long Head)

Answer 8

Extensor of elbow joint

Question 9

O: Pectoralis Major

Answer 9

Clavicle, sternum, and upper 6
costal cartilages

Question 10

I: Pectoralis Major

Answer 10

Lateral lip of bicipital groove

Question 11

N: Pectoralis Major

Answer 11

Medial and
Lateral Pectoral

Question 12

A: Pectoralis Major

Answer 12

Adducts and rotates arm
medially; flexes arm