Needle Electromyography Flashcards Preview

Neuromuscular > Needle Electromyography > Flashcards

Flashcards in Needle Electromyography Deck (10)
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1
Q

Endplate noise

A

Irregular firing patern (hissing)
20-40hz
“sea shell”
source: mepp (monophasic negative)

2
Q

Endplate spike

A

Irregular (sputtering)
5-50Hz
“sputtering fat in a frying pan”
source: muscle fiber (terminal axonal twig, bi/tri phasic initial negative)

3
Q

Fibrillation

A

Regular
0.5-10Hz (occasionally 30Hz)
“Rain on a tin roof or tick-tock on a clock”
source: muscle fiber (spike, di/tri phasic, initial positive)

4
Q

Positive sharp wave

A

Regular
0.5-10Hz (Occasinally 30Hz)
“dull pops, rain on a tin roof, tick-tock clock”
source: muscle fiber (diphasic, initial positive, slow negative)

5
Q

Myotonia

A

Waxing/waning
20-150Hz
“revving engine”
source: muscle fiber (spike, initial positive)

6
Q

CRD

A

Perfectly regular (unless overdriven)
5-100Hz
“machine”
source: multiple muscle fibers time linked together

7
Q

Fasciculations

A

Irregular
0.1-10Hz
“Corn Popping”
source: motor unit

8
Q

Myokymia

A

Bursting
1-5Hz (interburst), 5-60 Hz (intraburst)
“Marching soldiers”
source: motor unit

9
Q

Cramp

A

Interference pattern or several individual units
20-150Hz
“ “
source: motor unit

10
Q

Neuromyotonia

A

Waning
150-250Hz
“Pinging”
source: motor unit