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GA 1 > Exam 2 - Upper Limb Arteries > Flashcards

Exam 2 - Upper Limb Arteries Flashcards

1
Q

Internal thoracic a. - origin

A

inferior surface of first part of subclavian a.

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2
Q

Thyrocervical trunk a. - origin

A

anterior surface of first part of subclavian a.

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3
Q

internal thoracic a. - course

A
  • descends, inclining anteromedially
  • posterior to sternal end of clavicle and 1st costal cartilage
  • enters thorax
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4
Q

Thyrocervical trunk a. - course

A
  • ascends as a short, stout trunk

- gives rise to 4 branches: suprascap., ascending cervical, inferior thyroid a.’s, and cervicodorsal trunk

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5
Q

Suprascapular a. - origin

A

thyrocervical trunk

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6
Q

Suprascapular a. - course

A
  • passes inferolaterally crossing anterior scalene muscle, phrenic n., subclavian a., and brachial plexus running laterally posterior and parallel to clavicle
  • then passes over transverse scap. ligament to supraspinous fossa
  • then lateral to scap. spine (deep to acromion) to infraspinous fossa on posterior surface of scap.
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7
Q

Superior thoracic a. - origin

A

first part (as a branch) of axillary a.

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8
Q

Thoraco-acromial a. - origin

A

second part (first branch) of axillary a.

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9
Q

Lateral thoracic a. - origin

A

second part (second branch) of axillary a.

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10
Q

Circumflex humeral (ant. and post.) a. - origin

A

third part (sometimes via a common trunk) of axillary a.

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11
Q

Subscapular a. - origin

A

third part (largest branch of any part) of axillary a.

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12
Q

Superior thoracic a. - course

A
  • runs anteromedially along superior border of pec. minor
  • then passes between it and pec. major to thoracic wall
  • helps supply 1st and 2nd intercostal spaces and superior part of serratus anterior
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13
Q

Thoraco-acromial a. - course

A
  • curls around superomedial border of pec. minor
  • pierces costacoracoid membrane
  • divides into 4 branches: pectoral, deltoid, acromial, and clavicular
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14
Q

Lateral thoracic a. - course

A
  • descends along axillary border of pec. minor

- follows it onto thoracic wall, supplying lateral aspect of breast

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15
Q

Circumflex humeral (ant. and post.) a. - course

A
  • encircle surgical neck of humerus, anastomosing with each other laterally
  • larger posterior branch traverses quadrangular space
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16
Q

Subscapular a. - course

A
  • descends from level of inferior border of subscapularis along lateral border of scap.
  • dividing within 2-3 cm into terminal branches: circumflex scap. a. and thoracodorsal a.
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17
Q

Circumflex scapular a. - origin

A

subscapular a.

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18
Q

Thoracodorsal a. - origin

A

subscapular a.

19
Q

Circumflex scapular a. - course

A
  • curves around lateral border of scap. to enter infraspinous fossa, anastomosing with suprascap. a.
20
Q

Thoracodorsal a. - course

A
  • continues course of subscapular a., descending with thoracodorsal n. to enter apex of Latissimus dorsi
21
Q

Profunda brachii a. (deep artery of arm) - origin

A

near its origin of brachial a.

22
Q

Superior ulnar collateral a. - origin

A

near middle of arm of brachial a.

23
Q

Inferior ulnar collateral a. - origin

A

superior to medial epicondyle of humerus of brachial a.

24
Q

Profunda brachii a. - course

A
  • accompanies radial n. along radial groove of humerus

- supplying posterior compartment of arm and participating in periarticular arterial anastomoses around elbow joint

25
Q

Superior ulnar collateral a. - course

A
  • accompanies ulnar n. to posterior aspect of elbow

- anastomoses with posterior ulnar recurrent a.

26
Q

Inferior ulnar collateral a. - course

A

-passes anterior to medial epicondyle of humerus to anastomoses with anterior ulnar collateral a.

27
Q

Dorsal scapular n. - origin

A
  • posterior aspect of anterior ramus of C5

- frequent contribution from C4

28
Q

Dorsal scapular n. - course

A
  • pierces middle scalene

- descends deep to levator scap and rhomboids

29
Q

Dorsal scapular n. - structures innervated

A
  • rhomboids

- occasionally levator scap

30
Q

Long thoracic n. - origin

A

posterior aspect of anterior rami of C5-C7

31
Q

Long thoracic n. - course

A
  • passes through cervico-axillary canal, descending posterior to C8 and T1 roots of plexus (anterior rami)
  • runs inferiorly on superficial surface of serratus anterior
32
Q

Long thoracic n. - structures innervated

A

serratus anterior

33
Q

Suprascapular n. - origin

A
  • superior trunk, receiving fibers from C5-6, and often C4
34
Q

Suprascapular n. - course

A
  • passes laterally across lateral cervical region (posterior triangle of neck), superior to brachial plexus
  • then through scapular notch inferior to superior transverse scapular ligament
35
Q

Suprascapular n. - structures innervated

A
  • supraspinatus and infraspinatus muscles

- glenohumeral joint

36
Q

Subclavian n. - origin

A

superior trunk, receiving fibers from C5-6, and often C4

37
Q

Subclavian n. - course

A
  • descends posterior to clavicle and anterior to brachial plexus and subclavian a.
  • often giving an accessory root to phrenic n.
38
Q

Subclavian n. - structures innervated

A
  • subclavius and SC joint (accessory phrenic root innervates diaphragm)
39
Q

Lateral pectoral n. - origin

A

side branch of lateral cord, receiving fibers from C5-C7

40
Q

Lateral pectoral n. - course

A
  • pierces costocoracoid membrane to reach deep surface of pectoral muscles
  • a communicating branch to medial pectoral n. passes anterior to axillary a. and v.
41
Q

Lateral pectoral n. - structures innervated

A
  • primarily pec major

- some fibers pass to pec. minor via branch to medial pectoral n.

42
Q

Musculocutaneous n. - origin

A

terminal branch of lateral cord, receiving fibers from C5-C7

43
Q

Musculocutaneous n. - course

A
  • exits axilla by piercing coracobrachialis
  • descends between biceps brachii and brachialis and supplying both
  • continues as lateral cutaneous n. of forearm

GA 1 (7 decks)

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