Actions

Question 1

Depress the clavicle and draw it anteriorly

Elevate first rib (to assist during inhalation)

Stabilize the sternoclavicular joint

Answer 1

Subclavius

Question 2

Unilaterally:
Laterally flex the head and neck to the same side

Rotate the head and neck to the opposite side

Bilaterally:
Flex the neck

Assist to elevate the rib cage during inhalation

Answer 2

Sternocleidomastoid

Question 3

Unilaterally:
With the ribs fixed,laterally flexthe head and neck to the same side

Rotatehead and neck to the opposite side

Bilaterally:
Elevatethe ribs during inhalation

Flexthe head and neck

Answer 3

Anterior Scalene

Question 4

Unilaterally:
With the ribs fixed, laterally flex the head and neck to the same side

Rotate head and neck to the opposite side

Bilaterally:
Elevate the ribs during inhalation

Answer 4

Posterior Scalene or Middle Scalene

Question 5

Unilaterally:
Elevate the scapula (scapulothoracic joint)

Downwardly rotate the scapula (S/T joint)

Laterally flex the head and neck

Rotate the head and neck to the same side

Bilaterally:
Extend the head and neck

Answer 5

Levator Scapula

Question 6

Upper fibers bilaterally:
Extend the head and neck

Upper fibers unilaterally:
Laterally flex the head and neck to the same side
Rotate the head and neck to the opposite side
Elevate the scapula (scapulothoracic joint)
Upwardly rotate the scapula (S/T joint)

Middle fibers:
Adduct the scapula (S/T joint)
Stabilize the scapula (S/T joint)

Lower fibers:
Depress the scapula (S/T joint)
Upwardly rotate the scapula (S/T joint)

Answer 6

Trapezius

Question 7

Extend the shoulder (glenohumeral joint)

Adduct the shoulder (G/H joint)

Medially rotate the shoulder (G/H joint)

Answer 7

Latissimus Dorsi

Question 8

All fibers:
Abduct the shoulder (glenohumeral joint)

Anterior fibers:
Flex the shoulder (G/H joint)
Medially rotate the shoulder (G/H joint)
Horizontally adduct the shoulder (G/H joint)

Posterior fibers:
Extend the shoulder (G/H joint)
Laterally rotate the shoulder (G/H joint)
Horizontally abduct the shoulder (G/H joint)

Answer 8

Deltoid

Question 9

Extend the shoulder (glenohumeral joint)

Adduct the shoulder (G/H joint)

Medially rotate the shoulder (G/H joint)

Answer 9

Teres Major

Question 10

Abduct the shoulder (glenohumeral joint)

Stabilize the head of humerus in glenoid cavity

Answer 10

Supraspinatus

Question 11

Laterally rotate the shoulder (glenohumeral joint)

Adduct the shoulder (G/H joint)

Stabilize the head of humerus in glenoid cavity

Answer 11

Infraspinatus