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Cnim Highlighted 3 Questions And Answers With Verified Solutions Already Passed!!! Latest Updated 2024

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  • August 20, 2024
  • 33
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cnim highlighted 3 questions and answers with veri
  • when using monopolar stimulation for direct nerve
  • when using monopolar stimulation for direct nerve
  • ground electrodes for sep recordings

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Cnim Highlighted 3 Questions And
Answers With Verified Solutions Already
Passed!!! Latest Updated 2024
When using monopolar stimulation for direct nerve stimulation


A- the cathode electrode is connected to the negative terminal of the stimulator
output
B- the cathode electrode is connected to the ground
C- the anode electrode is connected to the negative terminal of the stimulator
output
D- the cathode electrode is connected to the positive terminal of the stimulator

output - ANSWER✔✔ A- the cathode electrode is connected to the negative
terminal of the stimulator output


In monopolar facial nerve stimulation, positive charge flows


A- from cathode to anode
B- from cathode to ground
C- from anode to cathode

D- muscle to ground - ANSWER✔✔ C- from anode to cathode


Ground electrodes for SEP recordings


A- should always be placed on the hand
B- are best placed between simulation and recording electrodes

,C- are not needed

D- should have an impedance of less than 50k ohms - ANSWER✔✔ B- are best
placed between simulation and recording electrodes


Bipolar electrodes are used for localization of:


A- Signals via phase reversal
B- Phase changes in instrument
C- Far field signals

D- Decreased common mode rejection - ANSWER✔✔ A- Signals via phase reversal


Loosely applied electrodes would cause:


A- Decreased stimulus artifact
B- Increased noise in your recording
C- Decreased common mode rejection

D- Increased low frequency response - ANSWER✔✔ B- Increased noise in your
recording


Electrode gel in between anode and cathode of the stimulating electrodes results
in:


A- High stimulating impedance
B- Salt bridge
C- Improved stimulation

,D- Electrode polarization - ANSWER✔✔ B- Salt bridge


Needle electrodes should be sterilized with:


A- Alcohol
B- Warm soapy water
C- Steam

D- Sodium hypochlorite - ANSWER✔✔ C- Steam


For peroneal nerve stimulation, the ground should be placed on:


A- The foot
B- the ankle
C- the calf

D- the thigh - ANSWER✔✔ D- the thigh


Personal Protection Devices (PPDs) consist of:


A- Gowns
B- Masks
C- All of the above

D- Gloves - ANSWER✔✔ C- All of the above


For SSEPs, the stimulating cathode is placed proximally in order to:

, A- Reduce muscle twitch
B- Minimize stimulus artifact
C- Prevent patient discomfort

D- Avoid anodal block - ANSWER✔✔ D- Avoid anodal block


Why is it important when recording SSEPs to have electrodes made out of similar
metals?


A- To avoid electrode polarization
B- To avoid delivering toxic chemicals
C- To ensure adequate stimulation

D- In order to have the same time constant - ANSWER✔✔ A- To avoid electrode
polarization


Why should platinum electrodes be used for cortical mapping cases?


A- To obtain better impedances
B- Don't require sterilization
C- Avoid toxic deposition during stimulation

D- They are less expensive - ANSWER✔✔ C- Avoid toxic deposition during
stimulation


A salt bridge would have which of the following effects?

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