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Anatomy Unit 3 > Ch 41 Brachial Plexus > Flashcards

Ch 41 Brachial Plexus Flashcards

1
Q

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

A

brachial plexus

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2
Q

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

A

ventral rami; dorsal rami

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3
Q

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

A

c5, c6, c7, c8, and t1

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4
Q

The ventral rami of the brachial plexus combine to from __

A

trunks of the brachial plexus

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5
Q

The ventral rami of c5 and c6 join to form the

A

upper trunk

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6
Q

the ventral famous of c7 continues as the

A

middle trunk

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7
Q

the ventral rami on c8 and t1 join to form the

A

lower trunk

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8
Q

trunks are found in the

A

neck

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9
Q

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

A

anterior division; posterior division

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10
Q

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

A

lateral cord

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11
Q

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

A

upper and middle

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12
Q

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

A

medial cord

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13
Q

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

A

upper, middle and lower

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14
Q

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

A

posterior cord

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15
Q

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

A

upper, middle and lower

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16
Q

Cords are all found in the

A

axilla

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17
Q

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

A

axillary artery

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18
Q

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

A

8, distally

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19
Q

Branches of Ventral Rami

A

Dorsal Scapular Nerve

Long thoracic

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20
Q

Branches of the Trunks

A

Nerve to the subclavius

Suprascapular Nerve

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21
Q

Branches of the Cords

A 
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
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22
Q

Nerves Derived from Cords (Primary Nerves)

A

Musculocutaneous Nerve
Ulnar Nerve
Radial Nerve
Median Nerve

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23
Q

The dorsal scapular nerve originates from the

A

ventral ramus of C5

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24
Q

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

A

levator scapula; rhomboids

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25
Q

What does the dorsal scapular nerve supply?

A

rhomboid major and rhomboid minor muscles

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26
Q

The long thoracic nerve originates from the

A

ventral rami of c5, c6, c7

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27
Q

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

A

axillary artery

external surface of the serratus anterior

28
Q

the long thoracic nerve supplies

A

serratus anterior

29
Q

The nerve to the subclavius originates from

A

the upper trunk

30
Q

The nerve tot he subclavius descends posterior to the ___

A

clavicle

31
Q

the nerve to the subclavius supplies

A

subclavius muscle

32
Q

the supra scapular nerve originates from

A

the upper trunk

33
Q

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

A

laterally, posteriorly; suprascpaular notch, supraspinous fossa

34
Q

The suprascapular nerve supplies the

A

supraspinatus muscle , infraspinatus muscle

35
Q

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

A

spine of the scapula; infraspinous fossa; infraspinatus muscle

36
Q

The lateral pectoral nerve originates from the

A

lateral cord

37
Q

the lateral pectoral nerve courses through the h_____ into the _______

A

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

38
Q

what does the lateral pectoral nerve supply?

A

pectoralis major

39
Q

the medial pectoral nerve originates from the

A

medial cord

40
Q

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

A

pectoralis minor; pectoralis major

41
Q

What does the medial pectoral nerve supply?

A

pec major and minor

42
Q

The medial brachial cutaneous nerve originates from

A

the medial cord

43
Q

The medial brachial cutaneous nerve pierces the ____

A

fascia of the proximal arm

44
Q

What does the medial brachial cutaneous nerve supply?

A

skin on the lower medial arm

45
Q

The medial antebrachial cutaneous nerve originates from the

A

medial cord

46
Q

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

A

middle of the forearm; antebrachial fascia.

47
Q

The middle antebrachial cutaneous nerve supplies the

A

skin on the medial forearm

48
Q

The upper subscapular nerve originates from the

A

posterior cord

49
Q

the upper subscapular nerve courses into the

A

subscapularis muscle

50
Q

the upper subscapular nerve supplies the

A

subscapularis muscle

51
Q

The thoracodorsal nerve originates from the

A

posterior cord

52
Q

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

A

inferiorly and posteriorly; latissimus dorsi

53
Q

What does the thoracodorsal nerve innervate?

A

latissimus dorsi

54
Q

The lower subscapular nerve originates from the

A

posterior cord

55
Q

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

A

anterior surface of the subscapularis muscle

56
Q

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

A

subscapularis muscle; heres major muscle

57
Q

the axillary nerve originates from the

A

posterior cord

58
Q

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

A

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

59
Q

The axillary nerve innervates

A

teres minor and deltoid muscles

60
Q

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

A

lateral cord

61
Q

The musculocutaneous nerve begins after the ______ is given off

A

lateral root to the median nerve

62
Q

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

A

medial cord

63
Q

The ulnar nerve begins after the ____ is given off

A

medial root to the median nerve

64
Q

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

A

posterior cord

65
Q

The radial nerve begins after the ____ is given off

A

axillary nerve

66
Q

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

A

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

Anatomy Unit 3 (11 decks)

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