chapter 18

Question 1

What is a network of intermingling and intertwining nerves that supplies structures of the upper limb?

Answer 1

Brachial plexus

Question 2

Spinal nerve plexuses are derived only from __________ and nerves from dorsal rami

Answer 2

ventral rami

Question 3

The brachial plexus is formed directly from the ventral rami of spinal nerves

Answer 3

C5, C6, C7, C8 and T1

Question 4

The ventral rami combine to form the __________ of the brachial plexus

Answer 4

trunks

Question 5

The ventral rami of C5 and C6 join to form the

Answer 5

upper trunk

Question 6

The ventral ramus of C7 continues to as the

Answer 6

middle trunk

Question 7

The ventral rami of C8 and T1 join to form the

Answer 7

lower trunk

Question 8

Each trunk of the brachial plexus divides into an __________________ and ___________________

Answer 8

1) anterior division
2) posterior division

Question 9

The anterior divisions of the upper and middle trunks join to form the

Answer 9

lateral cord

Question 10

the anterior division of the lower trunk continues as the

Answer 10

medial cord

Question 11

the three posterior divisions of the upper, middle, and lower trunks all join to form the

Answer 11

posterior cord

Question 12

cords are all found in the

Answer 12

axilla

Question 13

the names lateral, posterior, and medial indicate their location in relation to the

Answer 13

axillary artery

Question 14

the cords give of a total of __ nerves and then continues distally as the 4 major nerves of the upper limb

Answer 14

8

Question 15

Brachial plexus has…

Answer 15

1) branches of ventral rami
2) Branches of the trunks
3) Branches of the cords
4) Nerves derived from cords (primary nerves)

Question 16

Branches of ventral rami of the brachial plexus are?

Answer 16

1) dorsal scapular nerve
2) long thoracic nerve

Question 17

Branches of the trunks of the brachial plexus are?

Answer 17

1) nerve of the subclavius
2) SUPRASCAPULAR NERVES

Question 18

Branches of the cords of the brachial plexus are?

Answer 18

1) Lateral pectoral nerve
2) medial pectoral nerve
3) medial brachial cutaneous nerve
4) medial ANTEBRACHIAL CUTANEOUS NERVE
5) Upper subscapular nerve
6) Thoracodorsal nerve
7) Lower subscapular nerve
8) AXILLARY NERVE

Question 19

what are the nerves derived from cords (primary nerves) of the brachial plexus?

Answer 19

1) Musculocutaneous nerve
2) ULNAR NERVE
3) radial nerve
4) median nerve

Question 20

The dorsal scapular nerve originates from the ventral ramus of?

Answer 20

C5

Question 21

What courses deep to levator scapula and enters the deep surface of the rhomboids, supplying rhomboid major and rhomboid minor muscles?

Answer 21

Dorsal scapular nerve

Question 22

The long thoracic nerve originates from the ventral rami of C5, C6, and

Answer 22

C7

Question 23

What courses posterior to the axillary artery and courses on the external surface of the serratus anterior muscle, which it supplies?

Answer 23

Long thoracic nerve

Question 24

The nerve to the subclavius originates from the?

Answer 24

upper trunk

Question 25

What nerve descends posterior to the clavicle, ending in and supplying the subclavius muscle?

Answer 25

Nerve of the subclavius

Question 26

The suprascapular nerve originates from the?

Answer 26

Upper trunk

Question 27

What nerve courses laterally and posteriorly, this nerve passes through the suprascapular notch and enters the supraspinous fossa, innervating the __________________ muscle. Then it courses around the spine of the scapula and enters the infraspinous fossa, innervating the infraspinatus muscle?

Answer 27

1) Suprascapular nerve 2) spraspinatus muscle

Question 28

the lateral pectoral nerve originates from the?

Answer 28

Lateral cord

Question 29

what courses through the fascia above pectoralis minor into the deep surface of the pectoralis major muscle, which it supplies

Answer 29

Lateral pectoral nerve

Question 30

the medial pectoral nerve originates from the

Answer 30

medial cord

Question 31

What pierces the pectoralis minor muscle and passes through to the deep surface of pectoralis major, supplying both muscles?

Answer 31

Medial pectoral nerve

Question 32

The medial antebrachial cutaneous nerve originates from the

Answer 32

medial cord

Question 33

What pierces the fascia of the proximal arm and supplies the skin on the LOWER medial arm?

Answer 33

Medial brachial cutaneous nerve

Question 34

the medial brachial cutaneous nerve originates form the?

Answer 34

medial cord

Question 35

What descends below the middle of the forearm, where it pierces the antebrachial fascia and supplies the skin on the medial forearm?

Answer 35

Medial antebrachial cutaneous nerve

Question 36

the upper subscapular nerve originates from the?

Answer 36

Posterior cord

Question 37

What courses into and supplies the subscapularis muscle?

Answer 37

Upper subscapular nerve

Question 38

The thoracodorsal nerve originates from the?

Answer 38

posterior cord

Question 39

what courses inferiorly and posteriorly to the deep surface of the latissimus dorsi muscle, which it innervates?

Answer 39

Thoracodorsal nerve

Question 40

The lower subscapular nerve originates from the?

Answer 40

posterior cord

Question 41

What courses over the anterior surface of the subscapularis muscle and divides into two muscular branches, one supplying the subscapularis muscle and the other supplying the teres MAJOR muscle?

Answer 41

lower subscapular nerve

Question 42

The lower subscapular nerve courses over the anterior surface of the subscapularis muscle and divides into two muscular branches, one supplying the subscapularis muscle and the other supplying the ______________?

Answer 42

teres MAJOR muscle

Question 43

The axillary nerve originates from the?

Answer 43

Posterior cord

Question 44

What courses inferiorly through the quadrangular space of the shoulder, passes medial to the surgical neck of the humerus, and innervates the teres minor and DELTOID muscle?

Answer 44

Axillary nerve

Question 45

The axillary nerve courses inferiorly through the quadrangular space of the shoulder, passes medial to the surgical neck of the humerus, and innervates the teres minor and ______________?

Answer 45

DELTOID muscle

Question 46

What is the continuation of the lateral cord of the brachial plexus, beginning after the lateral root to the median nerve is given off?

Answer 46

Musculocutaneous nerve

Question 47

What is the continuation of the medial cord of the brachial plexus, beginning after the medial root to the median nerve is given off?

Answer 47

Ulnar nerve

Question 48

What is the continuation of the posterior cord of the brachial plexus, beginning after the axillary nerve is given off?

Answer 48

Radial nerve

Question 49

What is derived from the lateral root of the median nerve and the medial root of the median nerve?

Answer 49

medial nerve

Question 50

1) Which of the following is FALSE? a. The ventral ramus of C7 continues as the middle trunk b. Trunks are found within the neck c. The brachial plexus is formed directly from the dorsal rami of spinal nerves C5-T1 d. The ventral rami of C5 and C6 join to form the upper trunk

Answer 50

c. The brachial plexus is formed directly from the dorsal rami of spinal nerves C5-T1

Question 51

2) Which of the following is TRUE? a. The anterior divisions of the upper and middle trunks join to form the medial cord b. Each trunk of the brachial plexus divides into an anterior and posterior division c. Cords are named according to their location in relation to the brachial artery d. The cords gives off a total of 8 nerves and then continues proximally as four major nerves

Answer 51

b. Each trunk of the brachial plexus divides into an anterior and posterior division

Question 52

3) Branches coming directly off of the VENTRAL RAMI include which of the following? Select all that apply: a. Long thoracic nerve b. Dorsal scapular nerve c. Nerve to the subclavius d. Lateral pectoral nerve

Answer 52

a. Long thoracic nerve b. Dorsal scapular nerve

Question 53

4) Branches coming directly off the TRUNKS including which of the following? Select ALL that apply: a. Suprascapular nerve b. Nerve to the subclavius c. Lower subscapular nerve d. Axillary nerve

Answer 53

a. Suprascapular nerve b. Nerve to the subclavius

Question 54

5) Which of the following is FALSE? a. The nerve that supplies the infraspinatus originates from the upper trunk b. The nerve to the subclavius originates from the lateral cord c. The dorsal scapular nerve originates from the ventral ramus of C5 d. The cords give off a total of 8 nerves and then continues distally as four major nerve

Answer 54

b. The nerve to the subclavius originates from the lateral cord

Question 55

6) Which of the following is FALSE? a. The long thoracic nerve courses posteriorly to the axillary artery b. The medial pectoral nerve originates from the medial cord and supplies two muscles c. The thoracodorsal nerve courses inferiorly and posteriorly to supply the latissimus dorsi muscle d. The medial antebrachial cutaneous nerve supplies the skin on the lower medial arm

Answer 55

d. The medial antebrachial cutaneous nerve supplies the skin on the lower medial arm

Question 56

7) Match each nerve with the structure that they ORGINATE from: a. Axillary nerve: b. Long thoracic nerve: c. Thoracodorsal nerve: d. Medial pectoral nerve: e. Suprascapular nerve: f. Upper subscapular nerve:

Answer 56

a) posterior cord b) Ventral rami C5-C7 c) Posterior cord d) Medial cord e) Upper trunk f) posterior cord

Question 57

8) Which nerve supplies only ONE muscle? a. Axillary nerve b. Lower subscapular nerve c. Upper subscapular nerve d. Dorsal scapular nerve e. Suprascapular nerve

Answer 57

c. Upper subscapular nerve

Question 58

9) Which of the following is true? a. The musculocutaneous nerve begins after the medial root to the median nerve is given off b. The radial nerve is the continuation of the posterior cord after the axillary nerve is given off c. The ulnar nerve begins after the lateral root to the median nerve is given off d. The median nerve is derived from the posterior and medial roots of the median nerve

Answer 58

b. The radial nerve is the continuation of the posterior cord after the axillary nerve is given off

Question 59

10) Match each nerve to the correct AREA/MUSCLE that they supply: a. Teres minor: b. Skin on the lower medial arm: c. Pectoralis major: d. Serratus anterior: e. Skin of the medial forearm: f. Subscapularis:

Answer 59

a) axillary nerve b) medial brachial cutaneous nerve c) lateral pectoral nerve d) Long thoracic nerve e) medial antebrachial cutaneous nerve f) Upper subscapular nerve