21
Recording the Biopotentials of Sleep
NOTE: This chapter corresponds to Chapter 27 in Fundamentals of Sleep Technology, 2nd edition.
1. Sweat artifact in the EEG is:
A. Slow, rolling activity
B. Often mistaken for interictal spike activity
C. Similar to line noise (60 Hz)
D. Intermittent amplifier shorting due to salt in the sweat
2. Recording the EOG is possible because the ______________ has a negative charge and the ______________ has a positive charge.
A. Inion, nasion
B. Retina, cornea
C. Iris, vitreous humour
D. Cathode, anode
3. The physiologic calibrations are a series of instructions that are designed to determine that the:
A. Patient understands English
B. Patient will cooperate with the technologist
C. Sensors are picking up signals correctly
D. Optical isolation circuits are working properly
4. The presence of alpha waves during the physiologic calibrations typically indicates:
A. That the patient has fallen asleep
B. That the patient has closed his or her eyes
C. A seizure disorder
D. Poor electrode contact with the skin
5. Asking the patient to count during the physiologic calibrations:
A. Usually puts the patient to sleep
B. Tests the chin EMG recording
C. Tests the snoring channel
D. Allows the patient to time the breath-holding maneuver
6. Asking the patient to breathe through the mouth will cause a signal to be recorded in the:
A. Effort channel
B. Nasal pressure channel
C. Snoring channel
D. Thermal flow channel
7. Asking the patient to hold the breath for 10 seconds during the physiologic calibrations:
A. Causes severe oxygen desaturation
B. Simulates an apnea
C. Has no effect on the flow signals
D. Causes flattening of the chin EMG waveform
8. The complete QRS complex is a waveform that is:
A. Down and then up
B. Up and then down
C. Up, down, up
D. Down, up, down
9. Prolonged muscle artifact in the EEG:
A. Should be explained in the technologist notes
B. Indicates a ground electrode problem
C. Is always associated with a seizure
D. Means the technologist should replace the electrodes
10. Accessory equipment such as a CPAP machine or radio placed near the headbox may cause: