Electrodes & safety EEG
EEG Electrodes & Safety Quiz
Test your knowledge on EEG electrodes and safety protocols with this engaging quiz! Whether you are a student, professional, or just interested in the field, this quiz covers various essential topics including electrode properties, leakage current, and ground loops.
- 12 challenging questions
- Multiple-choice format
- Instant feedback on your answers
Which one of these is not a property of an electrode?
Battery
Capacitor
Low frequency filter
High frequency filter
Which one of these does not typically describe a half-cell potential?
Small half-cell potentials participate in flow of current
Direct current potentials
Electrode potentials relative to a hydrogen ion
Large half-cell potentials participate in the flow of current
Which of these best describes a basal-sphenoid electrode?
An electrode that is placed superficially to the sphenoid
A needle electrode that records deep medial temporal lobe
An electrode that is inserted into the external auditory meatus to record lateral inferior temporal lobe
A non-existent electrode type
What is leakage current?
Current that flows from electrical parts to chassis
Current that flows out from a broken wire
Current that flows from machine to patient
Current that flows from a hot wire to a metal chassis
What is ground loop?
Using 2 grounds for one machine
Using 2 pieces of equipment with separate grounds on one patient
Using a machine without a ground
Connecting 2 pieces of equipment with separate grounds to each other
What microshock current can cause sustained myocardial contraction?
1 A
20 uA
20 mA
100 mA
What is the minimum leakage current at the electrode of a patient?
1 uA
20 mA
20 uA
100 mA
Which of these does not accurately describe a non-polarized electrode?
Small electrode potential
Long time constant causing no distortion of low frequencies
Participates in the flow of current
Desirable over a polarized electrode in EEG
Which of these is not productive for controlling electrode potentials in EEG?
Using metal that does participate in current flow
Using same metal for all electrodes
Using metal that does not participate in current flow
Scrubbing the surface with soap/Nuprep
Which of these electrode types is best to record the lateral-inferior temporal lobe?
Indwelling
Typmanic
Nasopharyngeal
Basal-sphenoids
Which of these does not accurately describe the usage of Electrode Z?
Should be between 0.1-5.0 kOhms
Should be equal among other electrodes
Very low impedance is undesirable
Is checked by using a weak DC signal
Which of these does not accurately describe Electrode potentials?
A non-controllable factor in EEG
The potential difference when electrode is placed in eletrolyte
High potentials causes electrode to participate in current flow
Creates resistance
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