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Anatomy Module III > Axilla & Brachial Plexus > Flashcards

Axilla & Brachial Plexus Flashcards

1
Q

Boundaries of Axilla

A

Anterior - pec major and minor
Posterior: scapula latissimus doris , teres major
Medial: ribs 1-4 and intercostal spaces
Base: skin and fascia of arm
Apex : convergence of clavicle scapula and rib 1

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2
Q

Contents of axilla

A
  1. axilla artery
  2. axilla vein
  3. Lymphatics
  4. Brachial plexus
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3
Q

axilla artery orginates from?

A

Aorta –> (brachiocephalic trunk on the right side) –> subclavian artery –> AXILLARY ARTERY

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4
Q

beginning and end of axillary artery

A

begins at lateral aspect of the first rib and ends at the inferior border of the teres major

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5
Q

at the inferior border of the teres major the axillary artery is continous with what?

A

BRACHIAL ARTERY

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6
Q

Part 1 of axillary

location and branches

A

between the lateral border of the 1st rib and the medial border of the pec minor
SUPERIOR THORACIC ARTERY

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7
Q

part 2 of axillary artery

A

lies posterior to the pec minor
THORACOACROMIAL TRUNK
LATERAL THORACIC ARTERIES

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8
Q

part 3 of axillary artery

A

extends from the lateral border of pectoralis minor to the inferior border of the teres major
SUBSCAPULAR ARTERY
ANTERIOR HUMERAL CIRCUMFLEX
POSTERIOR HUMERAL CIRCUMFLEX

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9
Q

axillary vein

A

formed at the inferior border of the teres major muscle by the union of brachial veins (accompany veins of brachial artery and the basilic vein)

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10
Q

5 main groups of axillary lymph nodes

A

Pectoral, subscapular, humeral, central and apical

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11
Q

pectoral nodes

A

mainly recieve lymph from the anterior thoracic wall, INCLUDING MOST OF THE BREAST

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12
Q

subscapular nodes

A

receive lymph from the POSTERIOR aspect of the thoracic wall and scapular region

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13
Q

humeral nodes

A

receive NEARLY ALL THE LYMPH FROM THE UPPER LIMB

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14
Q

central group

A

lymph nodes is located along the 2nd part of the axillary artery and receives lymph from the pectoral, subscapular, and humeral nodes

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15
Q

apical nodes

A

vessels from the central nodes pass to this and it is located ALONG THE FIRST PART OF THE AXILLARY ARTERY

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16
Q

Brachial Plexus

A

formed from VENTRAL RAMI OF C5- T1
C5, 6,7,8,
Innervation of ENTIRE UPPER EXTREMITY IS DERIVED FROM THE BRACHIAL PLEXUS

results in individual nerves carrying fibers from several spinal cord levels

17
Q

posterior roots of brachial plexus?

A

Sensory - DERMATOME

18
Q

Anterior roots of brachial plexus?

A

Motor - MYOTOME

19
Q

anterior and posterior roots form what?

A

a MIXED SPINAL NERVE - each spinal nerve innervates a segment of skin (dermatome) and specific muscles (myotome)

20
Q

each SPINAL NERVE gives rise to…

A

anterior and posterior RAMI

brachial plexus from ventral rami of C%,6,7,8 and T1

21
Q

dorsal ramus

A

to deep back muscle and skin

22
Q

ventral ramus

A

to trunk and limbs - brachial plexus is formed by ventral rami of C5,6,7,8 and T1

23
Q

Branching pattern of brachial plexus

A 
Randy - Roots
Travis - Trunk
Drinks- Divisions
Cold - Cords 
Beer- Branches (Terminal)
24
Q

Supraclavicular branches

A 
come off ROOTS orTRUNKS 
Dorsal Scapular nerve -c5
Long thoracic nerve c5-c7
suprascapular nerve c5,c6 
nerve to subclavius c5.c6
25
Q

trunks

A

superior middle an inferior

26
Q

divisions

A

2 divisions - anterior and posterior (each with three )

27
Q

cords

A

medial
lateral
posterior

28
Q

Musculocutaneous, Median, Ulnar, Radial, and Axillary nerves are all..?

A

Terminal Branches

29
Q

branches off roots

A

long thoracic nerve and dorsal scapula nerve

30
Q

branch off trunk and where it comes from

A

suprascapular nerve - comes off SUPERIOR BRANCH

31
Q

nerve to subclavius u

A

from the superior trunk from c5 and c6

32
Q

infraclavicular branches

A

COME OFF THE CORDS

33
Q

cords

A

lateral
medial
posterior

34
Q

lateral cord gives rise to

A

lateral pectoral nerve

- innervating the pectoralis major

35
Q

medial cord gives rise to

A

medial pectoral nerve
medial brachial cutaenous nerves
medial antebrachial cutaneous nerves

36
Q

posterior cord gives rise to

A

upper subscapular nerve
Thoracodorsal nerve
lower subscapular nerve

37
Q

terminal branches off cords

A 
still considered infraclavicular branches 
musculocutaneous nerve
radial nerve
axillary nerve
median nerve 
ulnar nerve
38
Q

Musculocutaneous nerve

A

from the lateral cord and nerves C5,6,7

innervates coracobrachialis muscles - flexors

39
Q

median nerve

A

terminal branch from the lateral and medial cord

Anatomy Module III (7 decks)

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