RPSGT EXAM 2 | Questions and Answers Verified
100% Correct
The EEG observed in wake and REM are both characterized by what? -
✔✔Asynchronous EEG, low voltage, and mixed frequency
What general term is used to describe cues which synchronize our internal clock to the
external environment? - ✔✔Zeitgebers
Which come under the influence of circadian rhythm control? - ✔✔Body
temperature, hormone levels, and K+ levels
Destruction of the major endogenous circadian oscillator leads to: - ✔✔Arrhythmicity
The technician observes muscle artifact in a single EEG channel that shares a common
reference with other channels. What is the appropriate response? - ✔✔Re-reference
the channel showing artifact by changing the input signal derivation to a back-up
exploring electrode
The preferred method of correcting undesirable artifacts during the recording process is
to: - ✔✔Change the input signal derivations
If 60Hz artifact is observed in one of the channels during the bio-calibration process, the
appropriate action should be: - ✔✔Find the problem source and correct it before
beginning the study
What factors come into play when deciding to enter the patient's room to correct
artifacts? - ✔✔Importance of electrode channel in scoring, ease at which patient falls
asleep, and skill at fixing problem without waking patient
, Double-referencing (A1+A2) may be useful for? - ✔✔Reduce EKG artifact in EEG and
EOG channels
The chief way of excluding undesirable interfacing signals in polysomnograph is
accomplished by: - ✔✔Passing input signal through differential amplifiers
Which conditions are most likely to cause electrode-popping artifact? - ✔✔Pressure
against the electrode and poor ground connection
Which type of artifact presents as a high frequency artifact? - ✔✔Muscle
If the size of the prepared electrode site is too large, what can occur? - ✔✔Signal
contamination or bridging
What is not considered a physiologic artifact? - ✔✔Popping
Which types of artifacts are physiological? - ✔✔Muscle, respiratory, and cardio
ballistic
What is one of the contributing causes of EKG artifact in the arm or leg leads? -
✔✔Voltage differences resulting from increased electrode distances
What is the first step in differentiating high frequency artifact caused from muscle vs. a
poor electrode connection? - ✔✔Impedance check
What is true regarding the scoring of an epoch containing major body movement? -
✔✔Alpha coming into the movement constitutes scoring epoch as wake, and N2
100% Correct
The EEG observed in wake and REM are both characterized by what? -
✔✔Asynchronous EEG, low voltage, and mixed frequency
What general term is used to describe cues which synchronize our internal clock to the
external environment? - ✔✔Zeitgebers
Which come under the influence of circadian rhythm control? - ✔✔Body
temperature, hormone levels, and K+ levels
Destruction of the major endogenous circadian oscillator leads to: - ✔✔Arrhythmicity
The technician observes muscle artifact in a single EEG channel that shares a common
reference with other channels. What is the appropriate response? - ✔✔Re-reference
the channel showing artifact by changing the input signal derivation to a back-up
exploring electrode
The preferred method of correcting undesirable artifacts during the recording process is
to: - ✔✔Change the input signal derivations
If 60Hz artifact is observed in one of the channels during the bio-calibration process, the
appropriate action should be: - ✔✔Find the problem source and correct it before
beginning the study
What factors come into play when deciding to enter the patient's room to correct
artifacts? - ✔✔Importance of electrode channel in scoring, ease at which patient falls
asleep, and skill at fixing problem without waking patient
, Double-referencing (A1+A2) may be useful for? - ✔✔Reduce EKG artifact in EEG and
EOG channels
The chief way of excluding undesirable interfacing signals in polysomnograph is
accomplished by: - ✔✔Passing input signal through differential amplifiers
Which conditions are most likely to cause electrode-popping artifact? - ✔✔Pressure
against the electrode and poor ground connection
Which type of artifact presents as a high frequency artifact? - ✔✔Muscle
If the size of the prepared electrode site is too large, what can occur? - ✔✔Signal
contamination or bridging
What is not considered a physiologic artifact? - ✔✔Popping
Which types of artifacts are physiological? - ✔✔Muscle, respiratory, and cardio
ballistic
What is one of the contributing causes of EKG artifact in the arm or leg leads? -
✔✔Voltage differences resulting from increased electrode distances
What is the first step in differentiating high frequency artifact caused from muscle vs. a
poor electrode connection? - ✔✔Impedance check
What is true regarding the scoring of an epoch containing major body movement? -
✔✔Alpha coming into the movement constitutes scoring epoch as wake, and N2
