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RPSGT Exam/61 Complete Questions and Answers A+ Scores
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RPSGT Exam/61 Complete Questionsand Answers A+ Scores
Which waveform occurs at it's maximum amplitude in the central region of
the brain? - -Spindles and K complexes
-Circadian rhythm control falls primarily under the control of what? - -
Suprachiasmatic Nucleus (SCN)
-On a 24-hour cycle, the level of alertness is closely linked to what? - -Body
temperature
-In what area of the brain do most seizures occur? - -Temporal
-What structure is primarily involved in the control of wakefulness or
alertness? - -Reticular activating system (RAS)
-What is the "gateway" structure between the body and the cerebral cortex?
- -Thalamus
-Which neurochemical increases in REM sleep as well as wake? - -Ach
-Sleep spindles result from the blocking of information between
the____________ and the cortex and result from deactivation of the _________. -
-thalamus, RAS
-Bright light therapy affects which anatomic structure? - -SCN
-A tonic-clonic seizure represents the mass firing or synchronization of large
groups of neurons. Which sleep stage would you LEAST expect to see seizure
activity? - -REM
-Pontogeniculate (PGO) waves are an indicator of which sleep stage? - -REM
-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
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