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Flashcards in Exam 3 Brachioplexus Deck (111)
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1

What does the brachial plexus supply

Upper extremities

2

What forms the brachial plexus

Formed by anterior primary rami of C5 through T1 (maybe also from C4 and/or T2)

3

Where does the brachial plexus travel

Laterally over rib 1 into the axilla

4

Traveling medial to lateral what are the categories of the brachial plexus

Roots combine into trunks, trunks divide into divisions, divisions combine to form cords, cords divide into terminal nerves

5

Each root receives what from the sympathetic trunk

Gray ramus communicans

6

Where do roots pass

Between anterior and middle scalene muscles into posterior triangle

7

What are the brachial plexus roots relation to the subclavian artery

Posterior and superior to it

8

What do trunks of the brachial plexus spit into

Anterior and posterior division

9

What forms the superior trunk of brachial plexus

Roots of C5 and C6

10

What forms the middle trunk of the brachial plexus

Root of C7

11

What forms the inferior trunk of the brachial plexus

Roots of C8 and T1

12

Where do trunk pass through

Over rib 1 into the axilla

13

What do divisions of the brachial plexus split into

Anterior and posterior divisions

14

What do the anterior/poster divisions of the divisions of the brachial plexus supply

Anterior division supply anterior compartments of arm/forearm, posterior supplies posterior compartments of arm/forearm

15

How are cords named

In relation to the axillary artery

16

What forms the lateral cord

Anterior divisions of the superior and middle trunks

17

What fibers does the lateral cord contain

Fibers from C5, C6, C7

18

Where does the lateral cord lie

Lateral to second part of axillary artery

19

What forms the medial cord and where does it lie

Anterior division of inferior trunk lying medial to second part of axillary artery

20

What fibers are contained in the medial cord

Fibers from C8 and T1

21

What forms the posterior cord and where does it lie

Formed by the union of the posterior division of all three trunks lying posterior to second part of axillary artery

22

What fibers are contained in the posterior cord

C5-T1

23

What nerve branches off of the C5 root and contains fibers from C5 only

Dorsal scapular nerve

24

What muscles does the dorsal scapular nerve supply

Levator scapula, rhomboid major/minor

25

What also supplies levator scapula besides the dorsal scapular nerve

Fibers from C3 and C4

26

What is the long thoracic nerve formed by

Roos of C5, C6, and C7

27

What does the long thoracic nerve supply

Serratus anterior muscle

28

What nerves branch off the superior trunk of the brachial plexus

Supra-scapular nerve and nerve to the subclavius

29

What fibers does the suprascapular nerve contain

Fibers fro C5 and C6

30

What muscles are supplied by the suprascapular nerve

Supraspinatus, infraspinatus