Axilla and Shoulder Girdle

Question 1

Serratus Anterior Origin

Answer 1

Outer surfaces and superior border of ribs 1-9

Question 2

Serratus Anterior Insertion

Answer 2

Anterior surface of the medial border of the scapula

Question 3

Serratus Anterior Action

Answer 3

Abducts, protracts, and upwardly rotates the scapula

Question 4

Serratus Anterior Innervation

Answer 4

Long thoracic nerve (C5-C7)

Question 5

Deltoid Origin

Answer 5

Lateral 1/3 of clavicle, acromion and crest of the spine of the scapula

Question 6

Deltoid Insertion

Answer 6

Deltoid tuberosity of the humerus

Question 7

Deltoid Action

Answer 7

Anterior- flexion, medial rotation, adduction
Middle- adduction
Posterior- extension, lateral rotation, abduction
Anterior & Posterior- work together to abduct the middle portion

Question 8

Deltoid Innervation

Answer 8

Axillary

Question 9

Teres Major Origin

Answer 9

Inferior angle of the scapula, dorsal scapula near the angle

Question 10

Teres Major Insertion

Answer 10

Medial lip of the bicipital groove (lesser tubercle)

Question 11

Teres Major Action

Answer 11

Adduction and medial rotation of the arm, extends the arm when it is flexed, stabilizes during abduction

Question 12

Teres Major Innervation

Answer 12

Lower subscapular

Question 13

Supraspinatus Origin

Answer 13

Medial supraspinous fossa of the scapula

Question 14

Supraspinatus Insertion

Answer 14

Superior facet of the greater tubercle of the humeru

Question 15

Supraspinatus Action

Answer 15

Abduction, stabilize and prevent downward displacement of the humerus

Question 16

Supraspinatus Innervation

Answer 16

Suprascapular

Question 17

Infraspinatus Origin

Answer 17

Infraspinous fossa of the scapula

Question 18

Infraspinatus Insertion

Answer 18

Middle facet of the greater tubercle of the humerus

Question 19

Infraspinatus Action

Answer 19

Lateral rotation, holds the head of the humerus in the glenoid fossa

Question 20

Infraspinatus Innervation

Answer 20

Suprascapular

Question 21

Teres Minor Origin

Answer 21

Upper 2/3 of lateral border of scapula, superior to Teres Major

Question 22

Teres Minor Insertion

Answer 22

Lowest facet of the greater tubercle of the humerus

Question 23

Teres Minor Action

Answer 23

Lateral rotation, adduction of the arm, holds head of the humerus in the glenoid fossa

Question 24

Teres Minor Innervation

Answer 24

Axillary

Question 25

Subscapularis Origin

Answer 25

Medial subscapular fossa of the scapula

Question 26

Subscapularis Insertion

Answer 26

Lesser tubercle of the humerus

Question 27

Subscapularis Action

Answer 27

Medial rotation, holds head of humerus in glenoid fossa

Question 28

Subscapularis Innervation

Answer 28

Upper and lower subscapular nerves

Question 29

Pectoralis Major Origin

Answer 29

medial 1/2 of clavicle, sternum, costal cartilage of ribs 2-6, aponeurosis of the external abdonimal oblique

Question 30

Pectoralis Major Insertion

Answer 30

Lateral lip of the bicipital groove (intertubercular groove)

Question 31

Pectoralis Major Action

Answer 31

Adduction, Medical Rotation, Adduction of the shoulder
Clavicle Portion- flexion of the shoulder
Sternal Portion- extension of the shoulder from the flexed position

Question 32

Pectoralis Major Innervation

Answer 32

Lateral and medial pectoral nerves

Question 33

Pectoralis Minor Origin

Answer 33

Ribs 3-5

Question 34

Pectoralis Minor Insertion

Answer 34

Coracoid process of the scapula

Question 35

Pectoralis Minor Action

Answer 35

Stabilizes scapula, draws it forward and downward

Question 36

Pectoralis Minor Innervation

Answer 36

Medial pectoral nerve