Test Your Knowledge About Electrodes! Trivia Quiz

11 Questions | Total Attempts: 37

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Test Your Knowledge About Electrodes! Trivia Quiz

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Questions and Answers
  • 1. 
    The type of electrode most commonly used in an intensive care unit or operating room setting is ______.
    • A. 

      Epidural electrode

    • B. 

      Percutaneous electrode

    • C. 

      Sub-dermal electrode

    • D. 

      Kirsher electrode

  • 2. 
    It is most important that electrode impedances are balanced. Ideally, sub-dermal electrode impedances would be between what range?
    • A. 

      5k-7k ohms

    • B. 

      8k-11k ohms

    • C. 

      5-7 ohms

    • D. 

      12k-20k ohms

  • 3. 
    All of the following statements regarding sub-dermal electrodes are true except which one?
    • A. 

      Convenient, faster set-up.

    • B. 

      You or staff could get stuck.

    • C. 

      Higher current density than other types of electrodes.

    • D. 

      Require a conduction medium such as 10-20 paste.

  • 4. 
    Why must the skin/scalp be prepped before applying surface electrodes?
    • A. 

      Quicker electrode application.

    • B. 

      Reduce the amount of conduction medium required for sufficient contact.

    • C. 

      Remove dead skin cells, oil, hair styling product residue.

    • D. 

      Allow for greater patient comfort during electrode application.

  • 5. 
    What conduction medium is not permitted for use in the operating room?
    • A. 

      10-20 paste

    • B. 

      Elifix

    • C. 

      Collodion

    • D. 

      NuPrep

  • 6. 
    Epidural electrodes are made of platinum for what reason?
    • A. 

      Minimize movement of the electrode.

    • B. 

      Avoid neurotoxicity.

    • C. 

      Low current density.

    • D. 

      Decreased incidence of infection.

  • 7. 
    All of the following are true about epidural electrodes except _______.
    • A. 

      Can be used as a recording electrode only.

    • B. 

      Placed intraoperatively when surgeon creates a laminotomy.

    • C. 

      Generally has 3 contacts allowing for recording directly from the spinal cord.

    • D. 

      Used to record neurogenic motor evoked potentials.

  • 8. 
    When performing cortical grid mapping, looking for phase reversal, what does the absence of phase reversal indicate?
    • A. 

      Suggests less than optimal impedance on the cortical grid.

    • B. 

      Identifies close proximity of the pre-central gyrus.

    • C. 

      Suggests that the recording contacts are not over the centraol sulcus or obstructed from a large tumor.

    • D. 

      Suggests that the contralateral median stimulus intensity is insufficient.

  • 9. 
    Mixing electrodes made of various electrode metals is discouraged for all of the following reasons except ______.
    • A. 

      Introduces the possibility of microcurrent leading to interference.

    • B. 

      Creates possibility of unnecessary challenges during critical point of the case (ex. clipping an aneurysm)

    • C. 

      Introduction of artifact.

    • D. 

      Creates a lower averaged current density.

  • 10. 
    When measuring a patient's head in accordance with the 10-20 International System of Electrode Placement, the measurements are taken in what unit of measurement?
    • A. 

      Inches

    • B. 

      Mm

    • C. 

      Cm

    • D. 

      Kg

  • 11. 
    Which landmark of the International 10-20 System of Electrode Placement is sometimes challenging to locate due to anatomic variation in prominence?
    • A. 

      Inion

    • B. 

      Nasion

    • C. 

      Vertex

    • D. 

      Pre-auricular notch