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INRC > Peripheral Nerve > Flashcards

Peripheral Nerve Flashcards

1
Q

Where does the dorsal scapular nerve arise from?

A

C5 root

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2
Q

What muscles does the suprascapular nerve supply?

A

Supra and infraspinatus

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3
Q

What is the nerve supply to the pectoralis muscle?

A

Medial and lateral pectoral nerves

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4
Q

What muscle is supplied by the lower subscapular nerve?

A

Teres major

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5
Q

Where does the lower subscapular nerve arise from?

A

The posterior cord

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6
Q

What is the sensory nerve supply to the medial arm and forearm to the wrist?

A

medial ante-brachial cutaneous nerve from the medial cord (C8-T1). Note the arm pit is supplied by the intercostobrachial from T2.

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7
Q

How do you test the obturator nerve?

A

Leg adduction

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8
Q

What muscles does lateral leg extension test?

A

Tensor fascia lata

Gluteus medius

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9
Q

What muscles are tested with hip extension?

A

Gluteus maximus

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10
Q

What is double crush syndrome?

A

In addition to median or ulnar nerve compression, patients also have cervical radiculopathy

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11
Q

What is Semmes-Weinstein testing?

A

Monofilament testing for sensory discrimination as it allows threshold testing

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12
Q

What is the Durkan compression test?

A

Pressure over the proximal carpal tunnel causes symptoms within 30-60 seconds

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13
Q

What are the earliest NCS findings with CTS?

A

Sensory latency before motor latency

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14
Q

What proportion of patients with CTS have forearm pain?

A

15%

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15
Q

What are the EMG features of carpal tunnel syndrome?

A

Active (denervation) fibrillations on EMG

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16
Q

What are the 3 sensory nerves of the ulnar nerve that should be tested?

A

Palmar ulnar cutaneous nerve
Dorsal ulnar cutaneous nerve
Distal digital nerve

17
Q

What is Froment’s sign?

A

Use of thumb flexion to compensate for thumb adduction

18
Q

What are the sites of ulnar nerve compression around the elbow?

A 
Medial inter-muscular septum
Arcade of Struthers
Cubital tunnel
Osborne's ligament
Two head of FCU
19
Q

What is the Sneddon classification of peripheral nerve injury?

A

Neuropraxia
Axonotmesis
Neurotmesis

20
Q

When should sharp lacerations to a nerve be operated on?

A

Immediately

21
Q

What is the nerve supply to the rhomboids?

A

Dorsal scapular nerve

INRC (7 decks)

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