Upper Limb Nerves Flashcards

1
Q

Axillary nerve roots

A

C5-6

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2
Q

Axillary nerve sensory function

A

lower deltoid “regimental badge area”

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3
Q

Where does the axillary nerve exit the axilla?

A

Posteriorly via the quadrangular space

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4
Q

Which muscles are innervated by the axillary nerve?

A

Teres minor

Deltoid

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5
Q

Musculocutaneous nerve roots

A

C5-C7

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6
Q

Muculocutaeous nerve sensory function

A

Gives rise to lateral cutaneous nerve - innervates skin on lateral surface of forearm.

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7
Q

Musculocutaneous nerve motor function

A

“BBC”

Biceps, brachialis, coracobrachialis

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8
Q

Which cord of the brachial plexus does the MCN arise from?

A

Lateral cord

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9
Q

Which muscles does the MCN travel between?

A

Anterior to brachialis, deep to biceps

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10
Q

Which nerve roots form the median nerve?

A

C5-T1

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11
Q

Median nerve motor function

A

Flexors of anterior forearm, except FCU and medial half of FDP.
Thenar eminence.
Lateral 2 lumbricals

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12
Q

Median nerve sensory function

A

Palmar cutaneous branch: lateral palm

Digital cutaneous branch: lateral 3 1/2 digits on palmar surface

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13
Q

What is carpal tunnel syndrome?

A

Compression of the median nerve within the carpal tunnel

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14
Q

What type of fracture risks the median nerve?

A

Supracondylar

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15
Q

Which cords make up the median nerve?

A

Medial and lateral

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16
Q

Radial nerve roots

17
Q

Radial nerve sensory function

A

Skin of posterior forearm, dorsal palm (lateral side and lateral 3 1/2 digits)

18
Q

Radial nerve motor function

A

Triceps

Extensor muscles in forearm

19
Q

Which cord does the radial nerve arise from?

20
Q

How does the radial nerve descend the arm?

A

Along the radial groove of the humerus

21
Q

Ulnar nerve roots

22
Q

Ulnar nerve motor function

A

Intrinsic hand muscles except thenar eminence and lateral lumbricals. FCU, medial half of FDP

23
Q

Ulnar nerve sensory function

A

Anterior and posterior one and a half fingers and associated palm area

24
Q

Which cord does the ulnar nerve arise from?

A

Medial cord

25
Where does the ulnar nerve pass at the elbow?
Posterior to the medial epicondye
26
How does the ulnar nerve enter the hand?
Superficial to flexor retinaculum, within ulnar canal