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PNS exam III - mine > Brachial Plexus - Part 1 > Flashcards

Brachial Plexus - Part 1 Flashcards

1
Q

The brachial plexus if formed by what?

A

Anterior primary rami of C5-T1

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2
Q

The brachial plexus can also receive fibers from what?

A

C4 and/or T2

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3
Q

The brachial plexus travels laterally over what?

A

Rib 1

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4
Q

After traveling laterally over rib 1, the brachial plexus enters what?

A

The axilla

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5
Q

Traveling medial to lateral, roots _____ to form what?

A

combine

trunks

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6
Q

Traveling medial to lateral, trunks _____ to form what?

A

divide

divisions

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7
Q

Traveling medial to lateral, divisions ____ to form what?

A

Combine

cords

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8
Q

Traveling medial to lateral, cords ____ into what?

A

divide

Terminal nerves

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9
Q

Each root receives what? From where?

A

Gray ramus communicans

Sympathetic trunk

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10
Q

How many cervical sympathetic ganglia are there? Names?

A

3, superior, medial, inferior

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11
Q

The roots pass between what? Into what?

A

Anterior and middle scalene muscles

Posterior triangle

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12
Q

The roots are _____ and _____ to what structure?

A

Posterior and superior

subclavian artery

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13
Q

What combines to form the superior trunk?

A

C5 and C6

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14
Q

What combines to form the middle trunk?

A

C7 - stays alone

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15
Q

What combines to form the inferior trunk?

A

C8 and T1

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16
Q

Trunks pass over what?

A

Rib 1

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17
Q

The trunks pass over rib 1 into what?

A

axilla

18
Q

At which part of the brachial plexus does it become compartmentalized?

A

divisions

19
Q

Each trunk splits into what?

A

An anterior and posterior division

20
Q

Anterior division supply what?

A

Anterior compartment of arm

21
Q

Posterior division will supply what?

A

Posterior compartment of the arm

22
Q

What are the cords named for?

A

Relationship to axillary artery

23
Q

This cord is formed by the anterior divisions of the superior and middle trunk.

A

Lateral cord

24
Q

The lateral cord contains fibers from what?

A

C5, C6, C7

25
Q

The lateral cord lies lateral to what?

A

Second part of the axillary artery

26
Q

The medial cord is formed by what?

A

The anterior division of the inferior trunk

27
Q

The medial cord contains fibers from which nerves?

A

C8 and T1

28
Q

The medial cord lies _____ to the axillary artery

A

medial

29
Q

The posterior cord is formed by union of what?

A

Posterior division of all three trunks

30
Q

The posterior cord contains fibers from which nerves?

A

C5-C8, T1

31
Q

The posterior cord lies _____ to the axillary artery.

A

posterior

32
Q

What two nerves are formed from roots of the brachial plexus?

A

Dorsal scapular nerve

Long thoracic nerve

33
Q

The dorsal scapular nerve branches off what?

A

The C5 root

34
Q

The dorsal scapular nerve contains fibers from ?

A

C5 only

35
Q

The dorsal scapular nerve supplies three muscles.

A

levator scapular
rhomboid major
Rhomboid minor

36
Q

Rhomboid major is supplied by dorsal scapular nerve but also receives fibers from what nerves?

A

C3 and C4

37
Q

The long thoracic nerve is formed by what?

A

The roots of C5, C6, and C7

38
Q

The long thoracic nerve contains fibers from what nerves?

A

C5, C6, C7

39
Q

The long thoracic nerve supplies which muscle?

A

serratus anterior

40
Q

What two nerves branch off of the superior trunk?

A

suprascapular nerve

Nerve to the subclavius

PNS exam III - mine (12 decks)

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