Brachial Plexus and Axilla Flashcards

1
Q

Where are spinal nerves segmental?

A

T2-T11

Seen by dorsal primary rami

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2
Q

Plexus

A

Ventral rami refuse so that each nerve has more than one spinal cord level in it

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3
Q

Acronym for pattern of plexus

A

Real truckers drink cold beer

Roots, trunks, divisions, cord, branches

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4
Q

Trapezius innervated by

A

Accessory nerve

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5
Q

Spinal nerves included as roots of brachial plexus

A

C5, C6, C7, C8, T1

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6
Q

Roots lie between which two muscles?

A

Anterior and middle scalene

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7
Q

What runs between anterior and middle scalene

A

Subclavian artery, brachial plexus roots

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8
Q

Trunks and which roots compose them

A
Superior (C5 and C6)
Lower roots (C8 and T1)
Middle trunk (C7)
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9
Q

What do trunks divide into and what are they named for

A

Anterior and posterior divisions

Location to clavicle

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10
Q

Cords and how they are named and what they are ocmposed of

A

Lateral - anterior of superior and middle
Medial - anterior of inferior
Posterior - posterior of inferior, superior, and middle

Named for location to axillary artery

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11
Q

Where are cords located?

A

Axilla

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12
Q

What do anterior and middle cords supply?

A

Flexor muscles and anterior aspects of upper limb

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13
Q

Posterior cords supply

A

Extensor muscles and posterior of upper limb

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14
Q

Branches of Medial and lateral cords and where they come from

A

Musculocutaneous - lateral
Ulnar - medial
Median - lateral and medial

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15
Q

Musculocutaneous branch innervation

A

Flexor component of the arm and becomes cutaneous name in forearm

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16
Q

Musculocutaneous in the forearm called

A

Lateral antebrachial cutaneous nerve

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17
Q

Ulnar branch innervates

A

Muscles and skin in forearm and hand…none in arm

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18
Q

Median branch innervates

A

Anterior of forearm and some hand

Carpal tunnel syndrome

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19
Q

Branches of posterior cord and location

A

Axillary - through quadrangular space

Radial - winds around humerous and travels down

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20
Q

Axillary branch innervation

A

Deltoid muscles and skin, teres minor

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21
Q

Radial branch innervation

A

all extensors of arm and anterior of forearm

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22
Q

Branches from roots and which roots

A

Dorsal scapular - C5

Long thoracic - C5-C7

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23
Q

Dorsal scapular location and innervation

A

Runs along levator scapulae

innervates levator scapulae and rhomboids

24
Q

Long thoracic innervation and location

A

Superior surface of serratus anterior (odd)

Serratus anterior

25
Q

Injury to long thoracic nerve leads to

A

winged scapula

26
Q

Branches from superior trunk

A

Suprascapular

Nerve to the subclavius

27
Q

Suprascapular nerve

A

Runs deep to trapezius

Innervates supraspinatus and infraspinatus muscle

28
Q

Branches from lateral cord and what innervations

A

Lateral pectoral - pectoralis major

29
Q

Branches from medial cord and what they innervate?

A

Medial pectoral - pectoralis minor and some major
Medial cutaneous of arm
Medial cutaenous of forearm
^^Both supply skin on medial side of structures

30
Q

Lateral pectoral nerve and medial pectoral nerve locatons

A

Lateral is actually medial to the medial pectoral nerve

31
Q

Branches from posterior cord

A

Upper and lower subscapular nerves

Thoracodorsal nerve

32
Q

Upper and lower subscapular innervate

A

Both - subscapularis

Lower - teres major

33
Q

Toracodorsal nerve

A

Between subscapular nerves

Runs through axilla to innervate latissimus dorsi

34
Q

As you move down spinal cord of brachial plexus, innervation pattern

A

Moves down the limb

35
Q

Anterior/posterior organization of plexus

A

Anterior - innvervates mostly flexors

Posterior - mostly extensors

36
Q

Axilla anterior borders

A

Pectoralis major and minor

37
Q

Axilla posterior borders

A

Subscapularis, teres major, and latissimus dorsi

38
Q

Axilla medial border

A

Serratus anterior

39
Q

Axeilla lateral border

A

Humerus

40
Q

Axilla inferior border

A

Skin and fascia at teres major level

41
Q

How to axilla communcate with neck?

A

Cervico-axillary canal

42
Q

Subclavian artery and where it is renamed

A

Major supply to upper limb

Renamed at first rib to axillary artery

43
Q

Where is axillary artery renamed?

A

Border of teres major to brachial artery

44
Q

How is axillary artery divided into regions and what are they?

A

Pectoralis minor
Proximal
Deep
Distal

45
Q

Proximal part of axillary

A

Superior thoracic artery

46
Q

Deep part of axillary divides into

A

Toracoacromial artery

Lateral thoracic artery

47
Q

Distal part of axillary artery

A

Subscapular artery
Anterior humeral circumflex artery
Posterior humeral circumflex artery

48
Q

Superior thoracic artery supplies

A

Thoracic wall

49
Q

Lateral thoracic artery Runs near

A

long thoracic nerve

50
Q

Surgical head of humerous

A

Posterior humeral circumflex artery

51
Q

Brachial artery branches

A

Deep brachial artery
Radial and ulnar
Common interosseous artery

52
Q

Deep brachial artery supply

A

Mostly supplies posterior branch of arm

53
Q

Radial and ulnar arteries supply

A

anterior compartment of forearm and hand

54
Q

Common interosseous artery divides into and what to they supply

A

Anterior and posterior interosseous arteries

Supply those compartments of forearm

55
Q

Collateral circulation

A

Common near joints

Alternate routes of circulation

56
Q

Anastomosis

A

Communication between vessels

57
Q

Collateral circulation around elbow

A

Collateral branches from brachial and deep brachial anastomose with
Recurrent branches from radial, ulnar, and common interosseous arteries