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Anatomy Week 2 > Axillary Contents, Brachial Plexus > Flashcards

Axillary Contents, Brachial Plexus Flashcards

1
Q

Anterior boundary of the axillary region?

A

Pec. Major, Pec. Minor, Clavipectoral Fascia

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2
Q

Boundary marking the inlet of the axillary region?

A

1st rib, scapula clavicle

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3
Q

Boundary marking the medial axillary wall?

A

Serratus anterior, upper ribs

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4
Q

lateral boundary of the axillary region?

A

intertubercular groove

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5
Q

Posterior wall of the axillary region?

A

subscapularis, teres major, latissimus dorsi

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6
Q

Contents of the axillary region?

A

cords and terminal branches of the brachial plexus, axillary lymph nodes, axillary artery, fat

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7
Q

Location of 1st part of the axillary artery?

A

medial to where it runs under pec. minor.

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8
Q

Location of 2nd part of the axillary artery?

A

portion located under pec. minor

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9
Q

3rd part of the axillary artery?

A

lateral to pec. minor insertion on coracoid process

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10
Q

How many divisions are in each part of the axillary artery?

A

1st - 1 div.
2nd- 2 div.
3rd - 3 div.

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11
Q

Branches of the 1st part of the axillary artery?

A

supreme thoracic

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12
Q

Branches of the 2nd part of the axillary artery?

A

thoracoacromial a., lateral thoracic a.

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13
Q

Branches of the Thoracoaromial trunk?

A

Clavicular, acromial, deltoid, PECTORAL

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14
Q

Branches of the 3rd part of the axillary artery?

A

POSTERIOR CIRCUMFLEX HUMERAL, ANTERIOR CIRCUMFLEX HUMERAL ARTERY, SUBSCAPULAR ARTERY

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15
Q

Branches of the subscapular artery?

A

circumflex scapular artery, thoracodorsal artery

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16
Q

Why is the axillary space important?

A

its the gateway to the upper limb

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17
Q

What regions are linked by the axillary space?

A

Thoracic and neck region to arm

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18
Q

What encloses the contents of the axillary region?

A

The axillary sheath

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19
Q

Roots of the brachial plexus are also known as…

A

ventral primary rami

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20
Q

What compartment do the anterior divisions supply?

A

anterior

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21
Q

what compartment do the posterior divisions supply?

A

Posterior

22
Q

The lateral cord contains fibers from what ventral rami?

A

C5-C7

23
Q

The medial cord contains fibers from which ventral rami?

A

C8-T1

24
Q

The posterior cord contains fibers from which ventral rami?

A

C5-T1

25
Q

How are the nerve cords named in the brachial plexus?

A

After their position relative to axillary artery

26
Q

The musculocutaneous nerve contains fibers from which two ventral rami?

A

C5, C6

27
Q

The median nerve contains fibers from which ventral rami?

A

C5-T1

28
Q

The ulnar nerve contains fibers from which ventral rami?

A

C8-T1

29
Q

The median nerve contains nerve fibers from which ventral rami?

A

C5-T1

30
Q

the axillary nerve contains fibers from which ventral rami?

A

C5, C6

31
Q

The radial nerve contains fibers from which ventral rami?

A

C5-T1

32
Q

Which nerves supply the anterior compartment of the upper limb?

A

Musculocutaneous, median, and ulnar

33
Q

Which nerves supply the posterior compartments of the upper limb?

A

axillary and radial nerves

34
Q

Which two nerves supply motor innervation to the the anteior compartment of the forarm and palm?

A

Median (C5-T1) and Ulnar (C8, T1) nerves

35
Q

Which nerves supply motor innervation to the anterior compartment of the arm?

A

Musculocutaneous

36
Q

The radial nerve exits to the posterior compartment through…

A

triangular interval

37
Q

Where can the 3 subscapular nerves be located?

A

ventral surface of the subscapularis muscle

38
Q

What is unique about the innervation of serratus anterior?

A

The long thoracic n. runs superficially along its surface

39
Q

When might the long thoracic n. be compromised?

A

during surgery near the anterior chest wall (masectomy)

40
Q

Indication that long thoracic nerve has been severed in mastectomy?

A

weakness when brushing hair

41
Q

the superior (supreme) thoracic artery supplies which region(s)?

A

upper regions of the medial and anterior axillary walls.

42
Q

Thoracoacromial trunk and its branches supply which muscles?

A

those on the anterior axillary wall.

43
Q

The lateral thoracic artery supplies…

A

mammary gland and serratus anterior. (travels w/ long thoracic n.)

44
Q

Posterior circumflex humeral artery

A

around surgical neck of humerus

45
Q

anterior humeral circumflex artery

A

anterior travel around the surgical neck

46
Q

Subscapular artery supplies…

A

the posterior axiallary wall with its two branches (circumflex scapular artery, thoracodorsal artery)

47
Q

Where is blood supply to the upper limb susceptible to trauma?

A

Where is is subcutaneous or in a fixed position

48
Q

Fracture of the 1st rib or anterior dislocation of the humeral head may cause trauma to the…

A

axillary artery

49
Q

What does the dorsal scapular anastamoses refer to?

A

Collateral circulation around the scapula provided by circumflex scapular –> dorsal scapular, suprascapular arteries

50
Q

Blockage of 1st or 2nd part of axillary will not completely cut off UE blood supply, why?

A

Blood from suprascapular and dorsal scapular arteries may flow back via circumflex scapular artery to re-enter axillary artery downstream

51
Q

75% of lymph from breast tissue drains into…

A

axillary lymphatics

52
Q

25% of breast tissue lymph travesls where?

A

to the parasternal lymph nodes to the other breast

Anatomy Week 2 (12 decks)

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