Chapter 13 The Musclular System: The Muscles Of The Upper Limb

Question 1

What is the origin, an insertion of the pectoralis minor?

Answer 1

Origin: ribs
Insertion: coracoid process of scapula

Question 2

What is the origin, an insertion of the Serratus Anterior?

Answer 2

Origin: ribs
Insertion: vertebral border of scapula

Question 3

What muscle is nicknamed the “boxers muscle”?

Answer 3

Serratus anterior

Question 4

What is the insertion of the Trapezius?

Answer 4

Clavicle and acromion an spine of scapula

Question 5

What two fibers help rotate the Scapula upward?

Answer 5

Superior an inferior fibers

Question 6

What fibers elevate the scapula?

Answer 6

Superior fibers

Question 7

What fibers adduct the scapula?

Answer 7

Middle fibers

Question 8

What fibers depress the scapula?

Answer 8

Inferior fibers

Question 9

What is the innervation of the Trapezius?

Answer 9

Accessory (XI) nerve

Question 10

What are the points of insertion for the Deltoid muscle?

Answer 10

Clavicle
Acromion
Spine of scapula

Question 11

What muscle is responsible for the first 15 degrees of abduction of the humerus

Answer 11

Supraspinatus

Question 12

What muscle is nicknamed the “suitcase muscle”?

Answer 12

Supraspinatus

Question 13

What are the four deep muscles of the shoulder?

Answer 13

Supraspinatus
Infraspinatus
There’s minor
Subscapularis

Question 14

The four deep muscles of the shoulder, SITS form what?

Answer 14

Rotator cuff

Question 15

What is the action of the pectoralis major?

Answer 15

Adducts and medially rotates arm at shoulder joint, clavicle head flexes arm, an sternocostal head extends the flexed arm to side of trunk

Question 16

Where is the insertion of the pectoralis major?

Answer 16

Greater tubercle and lateral lip if the intertubercular sulcus of humerus

Question 17

What is the action of the latissimus Doris?

Answer 17

Extends, adducts, an medially rotates arm, draws arm inferiorly and posteriorly

Question 18

What is the action of the Deltoid?

Answer 18

Lateral abducts arm
anterior flex an medically rotate arm
posterior extend an laterally rotate arm

Question 19

Where is the innervation of the Deltoid muscle?

Answer 19

Axillary nerve

Question 20

What is the action of the teres major?

Answer 20

Extends arm

Assists in adduction an medial rotation of arm

Question 21

What is the action of the coracobrachialis?

Answer 21

Flexes an adducts arm

Question 22

Where is the insertion of the coracobrachialis?

Answer 22

Middle of medial surface of humerus

Question 23

Where is the innervation of the coracobrachialis?

Answer 23

Musculocutaneous nerve

Question 24

Where is the origin of the Supraspinatus?

Answer 24

Supraspinatus fossa of scapula

Question 25

Where does the supraspinatus insert?

Answer 25

Greater tubercle of humerus

Question 26

What is the action of the supraspinatus?

Answer 26

Assists Deltoid in abducting arm

Question 27

Where is he origin of the infraspinatus?

Answer 27

Infraspinatus fossa of scapula

Question 28

What is the action of the infraspinatus?

Answer 28

Laterally rotates, an extends arm

Question 29

Where is the origin of the teres minor?

Answer 29

Inferior lateral border of scapula

Question 30

What is the action of the teres minor?

Answer 30

Laterally rotates an extends arm

Question 31

Where is the innovation of the teres minor?

Answer 31

Axillary nerve

Question 32

Where does the subscapularis insert?

Answer 32

Lesser tubercle of humerus

Question 33

What is the action of the subscapularis?

Answer 33

Medially rotates arm

Question 34

What muscle is missing out of 10% of the population?

Answer 34

Palmaris longus

Question 35

What is caused by compression of the median nerve?

Answer 35

Carpal tunnel pain

Question 36

What can be caused by strain of he extensor muscles if the forearm?

Answer 36

Tennis elbow

Question 37

What is it called when the thumb moves across the palm?

Answer 37

Opposition