AANEM Self-Study Curriculum Part 1 Flashcards
Define Charge
the force matter experiences when placed in an electromagnetic field (Coulomb Q)
Define Voltage
Difference in electrical potential between two points (Volts E)
Define Current
Flow of charge particles (AMPERE symbol = I
Define Impedance
total opposition to I (current) in an AC circuit. Includes resistance, capacitive reactance and inductive reactance (OHMS symbol = Z)
Define CMAP
number of muscle fibers that depolarize. Onset latency
Define SNAP
sum of all sensory nerve fibers. Peak latency
CV =
distance / (proximal lat - distal lat)
F-response
aff motor eff motor no synapse
H-reflex
aff sensory eff motor with synapse
SNAP LFF/HFF/Gain
20 hz - 2 khz gain 20 microvolts/div
CMAP LFF/HFF/Gain
10 hz - 10 khz - 2-5 mv/div
Normal H-reflex
34 ms and side to side up to 1.5ms
Normal F-response median/ulnar
32 ms
Normal F-response tibial/peroneal
<56 ms
Describe exercise protocol wtih RNS
RNS at rest –> 10s exercise RNS (post exercise facil) –> 1 min RNS at 1 2 3 and 4 min (post exercise exhaustion) –> if decrement the exercise 20s for repair
fibrillation source/speed/rhythm
muscle fiber 0.5 to 10hz regular
What conditions do NOT cause fibs
steroid myopathy and congenital/metabolic myopathies
CRD source/speed/rhythm
muscle fiber 5-100 hz / regular monomorphic
Fasciculation source/speed/rhythm
motor unit / 1-2 hz / IRREGULAR
myokymia source/speed/rhythm
motor unit / 5-70 hz / regular
neuromyotonia and cramps originate from
motor unit
myotonia originates from
muscle fiber
PSW source/speed/rhythm
muscle fiber - 10hz - regular
Axon loss evolution on NEE
Day 3 = decreased recruitment | 1 wk - 3 mo spontaneous | 3 mo MUAP morphology change | 6+ mos spont begins to decrease if no active pathology
Axon loss evolution on NCS
Day 3 = NL | 1-6 wk SNAP/CMAP Amp decrease with possible normalization in months to years.
no necrosis in myopathy =
no spontaneuous activity