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Neurology > EMG > Flashcards

EMG Flashcards

1
Q

What characteristics on EMG are indicative of a neuropathy?

A
  • Increased action potential duration

- Increased action potential amplitude

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2
Q

What characteristics on EMG are indicative of a myopathy?

A
  • Decreased action potential duration

- Decreased action potential amplitude

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3
Q

Describe the typical EMG appearance of myasthenia gravis.

A
  • Diminished response to repetitive stimulation
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4
Q

Describe the typical EMG appearance of Lambert-Eaton syndrome.

A
  • Incremental response to repetitive stimulation
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5
Q

Describe the typical EMG appearance of myotonic syndromes (myotonic dystrophy)

A
  • Extended series of repetitive discharges lasting up to 30s
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6
Q

Describe the typical EMG appearance of MND/AML.

A
  • Denervation indicated by fibrillations, positive sharp waves, and large amplitudes
  • Fasciculations
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Neurology (46 decks)

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