Muscles That Move The Humerus

Front 1

The pectoralis major and latissimus dorsi are known as___muscles because they originate on the axial skeleton.
a. Triangular
b. Suprascapular
c. Thoracodorsal
d. axial

Back 1

D. Axial

Front 2

What muscle is located on the inferior part of the back and commonly known as the "swimmer's muscle"?
a. Subscapularis
b. Latissimus Dorsi
c. Rotator Cuff
d. Teres Major

Back 2

B. latissimus dorsi

Front 3

What is the most commonly injured muscle of the rotator cuff due to its location between the head of the humerus and the acromion process of the scapula?
a. Supraspinatus
b. Infraspinatus
c. Teres Minor
d. Subscapularis

Back 3

A. Supraspinatus

Front 4

What injury can occur due to repetitive movement of an arm over the head?

Back 4

Impingement syndrome

Front 5

This muscle originates on the clavicle and the sternum and inserts on the intertubercular sulcus of the humerus-

Back 5

Pectoralis major

Front 6

The Pectoralis Major performs which of these actions?
a. adducts
b. medially rotates
c. flexes and extends arm
d. all of the above

Back 6

D. all of the above

Front 7

The latissimus dorsi performs which of these actions?
a. extends and medially rotates arm
b. adducts arm
c. flexes arm
d. a and b

Back 7

D. a and b

Front 8

What muscle originates at the lumbar vertabrae crests of the sacrum and the ilium and lumbar facia?

Back 8

Latissimus dorsi

Front 9

Where does the latissimus dorsi insert?

Back 9

Intertubercular sulcus

Front 10

Name the axial muscle(s) that medially rotates the arm-
a. Pectoralis major and Latissimus dorsi
b. deltoid
c. Teres major and Teres minor
d. all of the above

Back 10

A. Pectoralis Major and latissimus dorsi
(The rest are scapular muscles)

Front 11

What is the nerve innervation for the deltoid muscle?

Back 11

Axillary nerve

Front 12

What muscle originates on the acromial end of the clavicle and inserts on the deltoid tuberosity?

Back 12

Deltoid

Front 13

What are the actions of the deltoid muscle?
a. Extend and laterally rotate the arm
b. abduct
c. flex and medially rotate
d. all of the above

Back 13

D. All of the above

Front 14

The subscapularis originates at the___, and inserts at the ___?

Back 14

Subcapular fossa of scapula, lesser tubercle of humerus

Front 15

What is the action of the subscapularis?

Back 15

Medially rotates arm

Front 16

Wher does the supraspinatus originate and insert?

Back 16

Supraspinous fossa of scapula, greater tubercle of humerus

Front 17

What is the action of the suprapinatus muscle?
a. Adduct arm
b. Assist Subscapularis in rotating the arm
c. flexes arm
d. Assists deltoid in abducting the arm

Back 17

D. assists deltoid in abducting the arm

Front 18

Where does the Infraspinatus originate and insert?

Back 18

Infraspinous fossa, greater tubercle

Front 19

What is the action of the Infraspinatus?

Back 19

Laterally rotates and adducts arm

Front 20

Name the SITS muscles that insert on the Greater tubercle of the humerus-

Back 20

Suprapinatus, Infraspinatus, and Teres Minor

Front 21

Name all of the muscles that laterally rotate the humerus-

Back 21

Deltoid, Infraspinatus, and Teres minor

Front 22

Where does the teres major originate and insert?

Back 22

Inferior angle of the scapula, and medial lip of intertubercular sulcus

Front 23

What is the action of the teres major?

Back 23

Extends arm at the shoulder joint and assists in adduction and medial rotation of arm

Front 24

What muscle originates at the inferior lateral border of the scapula and inserts on the greater tubercle of the humerus?

Back 24

Teres minor

Front 25

What is the action of the teres minor?

Back 25

Laterally rotates, extends, and adducts arm

Front 26

Name the muscle that originates on the coricoid process-

Back 26

Coracobrachialis

Front 27

Where does the coracobrachialis originate and insert?

Back 27

Coracoid process of the scapula, and middle of medial shaft surface of humerus

Front 28

What is the action of the coracobrachialis?

Back 28

Flexes and adducts arm at shoulder joint

Front 29

What muscle makes up the anterior border of the axilla?

Back 29

Pectoralis major

Front 30

What muscle makes up the posterior axillary border?

Back 30

Latissimus dorsi

Front 31

Name the muscles that make up the rotator cuff

Back 31

Supraspinatus-infraspinatis-teres minor-subscapularis

Front 32

Which muscles can medially rotate the arm?
(there are 5)

Back 32

Pectoralis major-deltoid (anterior)-latissimus dorsi-subscapularis-Teres major

Front 33

Which muscles flex the arm?
(there are 3)

Back 33

P. major-deltoid (Anterior)-coracobrachialis

Front 34

Name the 2 muscles that abduct the arm

Back 34

lateral deltoid and supraspinatus

Front 35

What 3 muscles laterally rotate the arm?

Back 35

posterior deltoid, teres minor, and infraspinatus

Front 36

What 5 muscles extend the arm?

Back 36

Latissimus dorsi, posterior deltoid, teres minor, teres major, pectoralis major

Front 37

There are 6 muscles that adduct the humerus, name them.

Back 37

Pectoralis major, latissimus dorsi, infraspinatus, teres major, teres minor, coracobrachialis