Shoulder And Arm

Question 1

Deltoid

Answer 1

All fibers:
▫️Abduct shoulder

Anterior fibers:
▫️Flex shoulder
▫️Medially rotate shoulder
▫️Horizontally addicted shoulder

Posterior fibers:
▫️Extend shoulder
▫️Laterally rotate shoulder
▫️Horizontally abduct shoulder

Question 2

Trapezius

Answer 2

Upper fibers:
▫️Extend neck (bilaterally)
▫️Laterally flex head and neck to the same side (unilaterally)
▫️Rotate head and neck to opposite side (unilaterally)
▫️Elevate Scapula (unilaterally)
▫️Upwardly rotate Scapula (unilaterally)

Middle Fibers:
▫️Adduct Scapula
▫️Stabilize Scapula

Lower fibers:
▫️ Depress Scapula
▫️ Upwardly rotate Scapula

Question 3

Latissimus Dorsi

Answer 3

▫️ Extend shoulder (glenohumeral joint)
▫️ Adduct shoulder
▫️ Medially rotate shoulder

Question 4

Teres Major

Answer 4

▫️ Extend shoulder (glenohumeral joint)
▫️ Adduct shoulder
▫️ Medially rotate shoulder

Question 5

Supraspinatus

Answer 5

▫️ Abduct shoulder

▫️ Stabilize head of humerus in glenoid cavity

Question 6

Teres Minor

Answer 6

▫️ Laterally rotate shoulder
▫️ Adduct shoulder
▫️ Stabilize head of humerus in glenoid cavity

Question 7

Infraspinatus

Answer 7

▫️ Laterally rotate shoulder
▫️ Adduct shoulder
▫️ Stabilize head of humerus in glenoid cavity

Question 8

Subscapularis

Answer 8

▫️ Medially rotate shoulder

▫️ Stabilize head of humerus in glenoid cavity

Question 9

Rhomboids

Answer 9

▫️ Adduct Scapula
▫️ Elevate Scapula
▫️ Downwardly rotate scapula

Question 10

Levator Scapula

Answer 10

Unilaterally:
▫️ Elevate the Scapula
▫️ Downwardly rotate Scapula
▫️ Laterally flex head and neck
▫️ Rotate head and neck to same side

Bilaterally:
▫️ Extend head and neck

Question 11

Serratus Anterior

Answer 11

With origin fixed:
▫️ Abduct the Scapula
▫️ Upwardly rotate the Scapula
▫️ Depress the Scapula
▫️ Hold medial border of the Scapula against rib cage

With the Scapula fixed:
▫️ May act to elevate the thorax during forced inhalation

Question 12

Pectoralis Major

Answer 12

All fibers:
▫️Adduct shoulder
▫️ Medially rotate shoulder
▫️ Assist to elevate thorax during forces inhalation (with the arm fixed)

Upper fibers:
▫️ Flex shoulder
▫️ Horizontally addicted shoulder

Lower fibers:
▫️ Extend shoulder

Question 13

Pectoralis Minor

Answer 13

▫️ Depress the Scapula
▫️ Abduct the Scapula
▫️ Downwardly rotate the Scapula
▫️ Assist to elevate thorax during forced inhalation (with the Scapula fixed)

Question 14

Subclavius

Answer 14

• Depress the clavicle and draw it anteriorly
• Elevate the first rib (to assist during inhalation)
• Stabilize the sternoclavicular joint

Question 15

Biceps Brachii

Answer 15

• Flex the elbow
• Supinate the forearm
• Flex the shoulder

Question 16

Triceps Brachii

Answer 16

All Heads:
* Extend the elbow

Long head:

• Extend the shoulder
• Adduct the shoulder

Question 17

Coracobrachialis

Answer 17

• Flex the shoulder

* Adduct the shoulder