EEG 130 Final Exam Questions and
Answers
Alpha waves (EEG) - Answer-8-13hz
eyes closed awake eeg
Beta waves (EEG) - Answer-13-30Hz
strongest over frontal lobes; visual stimuli; mental activity; eyes open, low summation and much
processing activity
Theta waves (EEG) - Answer-4-7 Hz, sleep states
Delta waves (EEG) - Answer-0.5 - 3 hz
Seen during 'deep sleep' (stages 3 and 4 of non-REM sleep)
electrode pops can be caused by? - Answer-impedance difference between electrodes
What are some places electrodes are placed to monitor artifact - Answer-On the tube of a ventillator
The retina has a - Answer-negative charge
, The cornea has a - Answer-Posotive charge
The best placment for eye electrodes in sleep is - Answer-1cm out and down on the left, and 1cm out
and up on the right
Referential Montage (Monopolar) - Answer-Compares the EEG scalp electrode with a reference point
somewhere else on the body, perhaps still on the scalp, which is hoped to be neutral or indifferent
Bipolar montage - Answer-A channel setup based on recordings from two exploring electrodes.
A-P Longitudinal montage chain - Answer-"double banana chain" Includes the temporal and parisagital
channels.
Transverse channels - Answer-Left to right fassion. Evaluates subtle temporal slow
Circumfrential montage chain - Answer-10 channels, around the head. Great for frontal and occipital
abnormalities.
Physiological artifacts - Answer-originate from the body outside of the brain
-ex: muscle, pulse, eye mvt, respiration, sweat
Extra physiological or nonphysiological artifact - Answer-Dont origionate from the body.
-ex: Equipment malfunction, Electronics in the environment.
Derivation - Answer-Input from 2 active electrode sites
Answers
Alpha waves (EEG) - Answer-8-13hz
eyes closed awake eeg
Beta waves (EEG) - Answer-13-30Hz
strongest over frontal lobes; visual stimuli; mental activity; eyes open, low summation and much
processing activity
Theta waves (EEG) - Answer-4-7 Hz, sleep states
Delta waves (EEG) - Answer-0.5 - 3 hz
Seen during 'deep sleep' (stages 3 and 4 of non-REM sleep)
electrode pops can be caused by? - Answer-impedance difference between electrodes
What are some places electrodes are placed to monitor artifact - Answer-On the tube of a ventillator
The retina has a - Answer-negative charge
, The cornea has a - Answer-Posotive charge
The best placment for eye electrodes in sleep is - Answer-1cm out and down on the left, and 1cm out
and up on the right
Referential Montage (Monopolar) - Answer-Compares the EEG scalp electrode with a reference point
somewhere else on the body, perhaps still on the scalp, which is hoped to be neutral or indifferent
Bipolar montage - Answer-A channel setup based on recordings from two exploring electrodes.
A-P Longitudinal montage chain - Answer-"double banana chain" Includes the temporal and parisagital
channels.
Transverse channels - Answer-Left to right fassion. Evaluates subtle temporal slow
Circumfrential montage chain - Answer-10 channels, around the head. Great for frontal and occipital
abnormalities.
Physiological artifacts - Answer-originate from the body outside of the brain
-ex: muscle, pulse, eye mvt, respiration, sweat
Extra physiological or nonphysiological artifact - Answer-Dont origionate from the body.
-ex: Equipment malfunction, Electronics in the environment.
Derivation - Answer-Input from 2 active electrode sites
