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PTRS 710 Exam 3 > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

Brachial Plexus

A 
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
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2
Q

5 roots give off what nerves?

A 
Dorsal scapular (C5)
Phrenic (C3,4,5)
Long Thoracic (C5,6,7)
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3
Q

Superior Trunk

A

Union of C5 and C6

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4
Q

Superior trunk gives off what nerves?

A

Subclavius (C5)

Suprascapular (C4,5,6)

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5
Q

Middle Trunk

A

Continuation of C7

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6
Q

Inferior Trunk

A

Union of C8 and T1

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7
Q

Anterior Division

A

Innervates flexor muscles

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8
Q

Posterior Division

A

Innervates extensor muscles

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9
Q

Lateral Cord

A

Union of anterior division of superior and middle trunks

Carry C5,6,7 fibers

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10
Q

What branches off the lateral cord?

A

Lateral pectoral (C5,6,7)

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11
Q

Medial Cord

A

Continuation of anterior division of inferior trunk

Carry C8 and T1 fibers

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12
Q

What branches off the medial cord?

A

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

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13
Q

Medial cutaneous of arm provides sensation where?

A

Medial side of arm

Superior part of forearm

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14
Q

Medial cutaneous of forearm provides sensation where?

A

Medial side of forearm

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15
Q

Posterior Cord

A

Union of all three posterior divisions

Carry C5-T1 Fibers

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16
Q

What branches does the posterior cord give off?

A 
Upper subscapular (C5,6)
Thoracodorsal (C6,7)
Lower sub scapular (C6,7)
17
Q

5 Terminal Branches

A 
Axillary - posterior cord
Musculocutaneous - lateral cord
Median - lateral and medial cord
Radial - posterior cord
Ulnar - medial cord
18
Q

What clinical sign comes from superior BP injury?

A

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

19
Q

What clinical sign comes from inferior BP injury?

A

Claw hand

Sudden pull of arm superiorly trying to grab something

20
Q

What clinical sign comes from median nerve injury?

A

Pronator syndrome

Hand of benediction

21
Q

What clinical sign comes from radial nerve injury?

A

Wrist drop

22
Q

What clinical sign comes from a biceps tendon rupture?

A

Popeye deformity

23
Q

What is the clinical sign of Erb’s palsy?

A

Waiter’s tip

24
Q

What is in the triangular space?

A

Circumflex scapular artery

25
Q

What is in the quadrangular space?

A

Axillary

Posterior circumflex humeral

26
Q

What is in the triceps hiatus?

A

Radial nerve

27
Q

Thumb abduction test what nerves?

A

Median

Radial

28
Q

Thumb adduction test what nerve?

A

Ulnar

29
Q

Thumb extension test what nerve?

A

Radial

30
Q

Thumb flexion test what nerve?

A

Median

31
Q

Thumb opposition test what nerve?

A

Median

32
Q

Cubital fossa contains

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

PTRS 710 Exam 3 (9 decks)

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