Ch 41 Brachial Plexus

Question 1

Network of intermingling and intertwining nerves that supplies the structures of the upper limb

Answer 1

brachial plexus

Question 2

The brachial plexus is a spinal nerve plexus derived from _____ and never from ___

Answer 2

ventral rami; dorsal 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 of the brachial plexus combine to from __

Answer 4

trunks of the brachial plexus

Question 5

The ventral rami of c5 and c6 join to form the

Answer 5

upper trunk

Question 6

the ventral famous of c7 continues as the

Answer 6

middle trunk

Question 7

the ventral rami on c8 and t1 join to form the

Answer 7

lower trunk

Question 8

trunks are found in the

Answer 8

neck

Question 9

Each trunk of the brachial plexus divides into an ___ and a ___

Answer 9

anterior division; posterior division

Question 10

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

Answer 10

lateral cord

Question 11

the anterior divisions of the __ and __ trunks join to form the lateral cord

Answer 11

upper and middle

Question 12

the anterior division of the lower trunk all join to form the

Answer 12

medial cord

Question 13

the posterior divisions of of the ____ trunk all join to form the posterior cord

Answer 13

upper, middle and lower

Question 14

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

Answer 14

posterior cord

Question 15

the three posterior divisions of the ____, ____, and ____ trunks all join to form the posterior cord

Answer 15

upper, middle and lower

Question 16

Cords are all found in the

Answer 16

axilla

Question 17

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

Answer 17

axillary artery

Question 18

The cords give off a total of __ nerves and then continue ___ as the four major nerves of the upper limbs

Answer 18

8, distally

Question 19

Branches of Ventral Rami

Answer 19

Dorsal Scapular Nerve

Long thoracic

Question 20

Branches of the Trunks

Answer 20

Nerve to the subclavius

Suprascapular Nerve

Question 21

Branches of the Cords

Answer 21

Lateral Pectoral Nerve
Medial Pectoral Nerve
Medial brachial cutaneous nerve
Medial antebrachial cutaneous nerve
Upper subscapular nerve
Thoracodorsal nerve 
Lower sub scapular nerve
Axillary nerve

Question 22

Nerves Derived from Cords (Primary Nerves)

Answer 22

Musculocutaneous Nerve
Ulnar Nerve
Radial Nerve
Median Nerve

Question 23

The dorsal scapular nerve originates from the

Answer 23

ventral ramus of C5

Question 24

The dorsal scapular nerve courses deep to ___ and enters the deep surface of the ____

Answer 24

levator scapula; rhomboids

Question 25

What does the dorsal scapular nerve supply?

Answer 25

rhomboid major and rhomboid minor muscles

Question 26

The long thoracic nerve originates from the

Answer 26

ventral rami of c5, c6, c7

Question 27

The long thoracic nerve courses posterior to the _____ and courses on the ______

Answer 27

axillary artery | external surface of the serratus anterior

Question 28

the long thoracic nerve supplies

Answer 28

serratus anterior

Question 29

The nerve to the subclavius originates from

Answer 29

the upper trunk

Question 30

The nerve tot he subclavius descends posterior to the ___

Answer 30

clavicle

Question 31

the nerve to the subclavius supplies

Answer 31

subclavius muscle

Question 32

the supra scapular nerve originates from

Answer 32

the upper trunk

Question 33

The suprascapular nerve courses ____ and ____. This nerve passes through the _____ and enters the ____.

Answer 33

laterally, posteriorly; suprascpaular notch, supraspinous fossa

Question 34

The suprascapular nerve supplies the

Answer 34

supraspinatus muscle , infraspinatus muscle

Question 35

After supplying the supraspinatus muscle, the suprascapular nerve courses around the _____ and enters the ___ and supplies the

Answer 35

spine of the scapula; infraspinous fossa; infraspinatus muscle

Question 36

The lateral pectoral nerve originates from the

Answer 36

lateral cord

Question 37

the lateral pectoral nerve courses through the h_____ into the _______

Answer 37

fascia above the pectorals minor; deep surface of the pectorals major

Question 38

what does the lateral pectoral nerve supply?

Answer 38

pectoralis major

Question 39

the medial pectoral nerve originates from the

Answer 39

medial cord

Question 40

The medial pectoral nerve pierces the ____ and passes through to the _____

Answer 40

pectoralis minor; pectoralis major

Question 41

What does the medial pectoral nerve supply?

Answer 41

pec major and minor

Question 42

The medial brachial cutaneous nerve originates from

Answer 42

the medial cord

Question 43

The medial brachial cutaneous nerve pierces the ____

Answer 43

fascia of the proximal arm

Question 44

What does the medial brachial cutaneous nerve supply?

Answer 44

skin on the lower medial arm

Question 45

The medial antebrachial cutaneous nerve originates from the

Answer 45

medial cord

Question 46

the medial antebrachial cutaneous nerve descends below the _____ where it pierces the ____

Answer 46

middle of the forearm; antebrachial fascia.

Question 47

The middle antebrachial cutaneous nerve supplies the

Answer 47

skin on the medial forearm

Question 48

The upper subscapular nerve originates from the

Answer 48

posterior cord

Question 49

the upper subscapular nerve courses into the

Answer 49

subscapularis muscle

Question 50

the upper subscapular nerve supplies the

Answer 50

subscapularis muscle

Question 51

The thoracodorsal nerve originates from the

Answer 51

posterior cord

Question 52

The thoracodorsal nerve courses ___ and ____ to the deep surface of the ___

Answer 52

inferiorly and posteriorly; latissimus dorsi

Question 53

What does the thoracodorsal nerve innervate?

Answer 53

latissimus dorsi

Question 54

The lower subscapular nerve originates from the

Answer 54

posterior cord

Question 55

The lower subscapular nerve courses over the ___ and divides into two muscular branches

Answer 55

anterior surface of the subscapularis muscle

Question 56

The lower subscapular nerve divides into two muscular branches, one supplying the ____ and the other supplying the ____

Answer 56

subscapularis muscle; heres major muscle

Question 57

the axillary nerve originates from the

Answer 57

posterior cord

Question 58

the axillary nerve courses ___ through the _____. It passes medial to the ____

Answer 58

inferiorly; quadrangular space of the shoulder; surgical neck of the humerus

Question 59

The axillary nerve innervates

Answer 59

teres minor and deltoid muscles

Question 60

The musculocutaneous nerve is the continuation of the ______ of the brachial plexus.

Answer 60

lateral cord

Question 61

The musculocutaneous nerve begins after the ______ is given off

Answer 61

lateral root to the median nerve

Question 62

The unlar nerve is a continuation of the _____ of the brachial plexus

Answer 62

medial cord

Question 63

The ulnar nerve begins after the ____ is given off

Answer 63

medial root to the median nerve

Question 64

The radial nerve is the continuation of the ____ of the brachial plexus

Answer 64

posterior cord

Question 65

The radial nerve begins after the ____ is given off

Answer 65

axillary nerve

Question 66

The median nerve is derived from the ____ of the _____ and the ____ of the ____

Answer 66

lateral root of the median nerve and the medial root of the median nerve.