Brachial Plexus Flashcards Preview

PTRS 710 Exam 3 > Brachial Plexus > Flashcards

Flashcards in Brachial Plexus Deck (32):
1

Brachial Plexus

5 Roots (C5-T1)
3 Trunks (superior, middle, inferior)
6 Divisions (each trunk into anterior and posterior)
3 cords (lateral, medial, posterior)
5 terminal branches

2

5 roots give off what nerves?

Dorsal scapular (C5)
Phrenic (C3,4,5)
Long Thoracic (C5,6,7)

3

Superior Trunk

Union of C5 and C6

4

Superior trunk gives off what nerves?

Subclavius (C5)
Suprascapular (C4,5,6)

5

Middle Trunk

Continuation of C7

6

Inferior Trunk

Union of C8 and T1

7

Anterior Division

Innervates flexor muscles

8

Posterior Division

Innervates extensor muscles

9

Lateral Cord

Union of anterior division of superior and middle trunks
Carry C5,6,7 fibers

10

What branches off the lateral cord?

Lateral pectoral (C5,6,7)

11

Medial Cord

Continuation of anterior division of inferior trunk
Carry C8 and T1 fibers

12

What branches off the medial cord?

Medial pectoral (C8-T1)
Medial cutaneous of arm (C8-T1)
Medial cutaneous of forearm (C8-T1)

13

Medial cutaneous of arm provides sensation where?

Medial side of arm
Superior part of forearm

14

Medial cutaneous of forearm provides sensation where?

Medial side of forearm

15

Posterior Cord

Union of all three posterior divisions
Carry C5-T1 Fibers

16

What branches does the posterior cord give off?

Upper subscapular (C5,6)
Thoracodorsal (C6,7)
Lower sub scapular (C6,7)

17

5 Terminal Branches

Axillary - posterior cord
Musculocutaneous - lateral cord
Median - lateral and medial cord
Radial - posterior cord
Ulnar - medial cord

18

What clinical sign comes from superior BP injury?

Erb's palsy - separation of head and neck with fall, stretching during baby delivering

19

What clinical sign comes from inferior BP injury?

Claw hand
Sudden pull of arm superiorly trying to grab something

20

What clinical sign comes from median nerve injury?

Pronator syndrome
Hand of benediction

21

What clinical sign comes from radial nerve injury?

Wrist drop

22

What clinical sign comes from a biceps tendon rupture?

Popeye deformity

23

What is the clinical sign of Erb's palsy?

Waiter's tip

24

What is in the triangular space?

Circumflex scapular artery

25

What is in the quadrangular space?

Axillary
Posterior circumflex humeral

26

What is in the triceps hiatus?

Radial nerve

27

Thumb abduction test what nerves?

Median
Radial

28

Thumb adduction test what nerve?

Ulnar

29

Thumb extension test what nerve?

Radial

30

Thumb flexion test what nerve?

Median

31

Thumb opposition test what nerve?

Median

32

Cubital fossa contains

Terminal branch of brachial artery
Radial/ulnar arteries
Biceps brachii tendon
Median nerve
Radial nerve branches