Brachial Plexus Flashcards Preview

Exam 3- Anatomy > Brachial Plexus > Flashcards

Flashcards in Brachial Plexus Deck (21)
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1

which part of brachial plexus is supraclavicular?

roots and trunks

2

which part of brachial plexus is at the clavicle?

divisions

3

which part of brachial plexus is infraclavicular?

cords and branches

4

true or false

Because the brachial plexus is made up of ventral rami of nerves, it is only motor.

False

plexus roots have all modalities and innervation

5

what nerve comes off of C5 root of ventral rami?

dorsal scapular nerve

6

what spinal nerve roots compose the long thoracic nerve?

C5, C6, C7

7

Where does the Nerve to subclavius and supra scapular nerves come into contact with brachial plexus?

upper trunk

8

where does supra scapular nerve join the brachial plexus?

upper trunk

9

where does nerve to subclavius join brachial plexus?

upper trunk

10

what cords are the anterior compartment?

lateral and medial cord

11

what nerves branch from medial cord

medial pectoral nerve
medial brachial cutaneous nerve
medial ante brachial nerve

12

what nerves branch from posterior cord

upper sub scapular nerve
lower sub scapular nerve
thoracodorsal nerve

13

which nerve of the major terminal branches compose the anterior compartment

musculocutaneous
median
ulnar

14

which nerve of the major terminal branches compose the posterior compartment

radial
axillary

15

what nerve is in the anterior compartment of the arm? what is its function?

Musculocutaneous nerve
flexors of elbow joint

16

what nerve is in the posterior compartment of the arm? what is its function?

radial nerve
extensors of elbow joint

17

what nerve is in the anterior compartment of the forearm and hand?

ulnar and median nerves

18

what nerve is in the posterior compartment of the arm?

radial nerve

19

presentation of this disorder causes upper limb adduction, medially rotated and elbow is extended and wrist is flexed

erb's palsy

20

sensory and motor defects of erbs palsy

sensory: lateral aspect of upper limb
motor: loss of arm abduction, loss of elbow flexion, loss of forearm supination, weakness of wrist extension

21

where do injuries causing Erb's palsy occur? what causes them?

superior trunk (C5 and C6 spinal nerve roots)
excessive, forceful increase in angle between neck and shoulder