Shoulders and Arms

Question 1

Deltoid Action: All fibers

Answer 1

Abduct the shoulder

Question 2

Deltoid Action: Anterior fibers

Answer 2

Shoulder:
Flex
Medially Rotate
Horizontally Adduct

Question 3

Deltoid Action: Posterior fibers

Answer 3

Extend the shoulder
Laterally Rotate the shoulder
Horizontally abduct the shoulder

Question 4

Deltoid Origin

Answer 4

Lateral one third of clavicle, acromion and spine of scapula

Question 5

Deltoid Insertion

Answer 5

Deltoid tuberosity

Question 6

Trapezius Actions: Upper Fibers

Answer 6

Bilaterally: Extend the head and neck

Unilaterally:
Laterally flex the head and neck to the same side
Rotate the head and neck to the opposite sides
Elevate the scapula
Upwardly rotate the scapula

Question 7

Trapezius Actions: Middle Fibers

Answer 7

Adduct the scapula
Stabilize the scapula

Question 8

Trapezius Actions: Lower Fibers

Answer 8

Depress the scapula
Upwardly rotate the scapula

Question 9

Trapezius Origin

Answer 9

External occipital protuberance,
medial portion of the superior nuchal line of the occiput,
ligamentum nuchae and spinous process of C-7- T-12

Question 10

Trapezius Insertion

Answer 10

Lateral one-third of clavicle, acromion, and spine of scapula

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Question 11

Latissimus Dorsi Actions

Answer 11

Shoulder:
Extend
Adduct
Medially rotate

Question 12

Latissimus Dorsi Origin

Answer 12

Inferior angle of scapula,
spinous process of last six thoracic vertebrae,
last three or four ribs,
thoracolumbar aponeurosis,
and posterior iliac crest

Question 13

Latissimus Dorsi Insertion

Answer 13

Intertubercular groove of the humerus

Question 14

Teres Major action

Answer 14

Extend shoulder
Adduct shoulder
Medially rotate shoulder

Question 15

Teres Major Origin

Answer 15

Inferior angle and lower one third of the lateral border of the scapula

Question 16

Teres Major Insertion

Answer 16

Crest of the lesser tubercle of the humerus

Question 17

Rotator Cuff Muscle “SITS”

Answer 17

S: Supraspinatus
I: Infraspinatus
T: Teres Minor
S: Subscapularis

Question 18

Supraspinatus Action:

Answer 18

Abduct shoulder
Stabilize head of the humerus in the glenoid cavity

Question 19

Supraspinatus Origin

Answer 19

Supraspinous fossa of the scapula

Question 20

Supraspinatus Insertion

Answer 20

Greater tubercle of the humerus

Question 21

Infraspinatus Action

Answer 21

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

Question 22

Infraspinatus Origin

Answer 22

Infraspinous fossa of the scapula

Question 23

Infraspinatus Insertion

Answer 23

Greater tubercle of the humerus

Question 24

Teres Minor Action

Answer 24

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

Question 25

Subscapularis Action

Answer 25

Medially rotate the shoulder
Stabilize the head of the humerus in the glenoid cavity

Question 26

Subscapularis Origin

Answer 26

Subscapular fossa of the scapula

Question 27

Subscapularis Insertion

Answer 27

Lesser tubercle of the hummerus

Question 28

thoracolumbar aponeurosis

Answer 28

a strong aponeurosis composed of three layers that extends the thoracic region to the sacrum and separates the paraspinal muscles from the muscles of the posterior abdominal wall