Term
-Neuronal activity of cortex dominates ___ activity
-You can ___ record cortical activity |
|
Definition
|
|
Term
| What does an EEG stand for? |
|
Definition
|
|
Term
EEG:
-___ wave
-__-__ microvolts
-__-__ microvolts in relaxed person |
|
Definition
|
|
Term
EEG:
-Awake: Frequencies of __ Hz and higher
-Drowsy and asleep: __ and __ Hz |
|
Definition
|
|
Term
Evoked Potential:
-Amplitude usually no more than a ___ microvolts
-Requires ___/___ relationship
-Knowledge of ___ and ___ |
|
Definition
| few; stimulus/response; timing; frequency |
|
|
Term
| What are the equipment components? |
|
Definition
| Recording site->amplifier->filter->analog digital converter->computer->trigger->stimulator->stimulating site (patient's ear) |
|
|
Term
| Breaking continuous signal into limited number of parts |
|
Definition
|
|
Term
| -Each part or sample has an equal time ___ |
|
Definition
|
|
Term
| Determines maximum signal frequency that can be digitized (Nyquist theorem) |
|
Definition
|
|
Term
| Breaking down a continuous signal into manageable amplitude units or steps |
|
Definition
|
|
Term
Stimulus Generator:
-Works in tandem with ___ ___
-Lets the averaging computer know ___ of each stimulus as presented
-Synonymous with ___ ___ in analysis window |
|
Definition
| signal averaging; timing; time zero |
|
|
Term
| Device used to gather and increase signal of physiologic activity |
|
Definition
| Biologic or Physiologic Amplifier |
|
|
Term
Differential Amplification:
-What are the 3 minimum electrodes?
-____________________ is when during amplification any signal and noise that is common at the scalp to the positive and negative inputs will be reduced/canceled
-Any signal that differs between these inputs will be ___ |
|
Definition
-Noninverting, inverting, and ground
-Common mode rejection
-amplified |
|
|
Term
Common Mode Rejection:
-___ amplifier
-Voltages at each of the two electrode sites are ___ from each other
-___ and ___ electrical activity common to both electrodes |
|
Definition
| Differential; subtracted; Unrelated; outside |
|
|
Term
What are the different names for these electrodes?
-Noninverting
-Inverting
-Ground |
|
Definition
-Active, positive, input 1
-Reference, negative, input 2
-Common ground |
|
|
Term
| Who developed the 10-20 Electrode Placement System? |
|
Definition
|
|
Term
10-20 Electrode Placement System:
-All left side are ___ numbers and all the ___ side are even numbers |
|
Definition
|
|
Term
Commonly Used Electrode Montages:
-What are the positions for the noninverting, inverting, and ground electrode locations for an ECochG? An ABR? An (A)MLR? A CERP? |
|
Definition
[image]
-i=ipsilateral and c=contralateral; CERTP=cortical event related potential |
|
|
Term
| What are 6 different electrode types? |
|
Definition
| Disc, snap-on gel, alligator clip, gold-foiled tiptrodes, TM electrode, and cable-electrode jumper |
|
|
Term
Electrodes - Impedance:
-___ surface of skin
-Apply ___ or ___
-Securely ___
-___ between electrode sites
-Below ___ ohms
-Within ___ ohms of each other
-Higher the impedance, the more important impedance ___
-___ impedance allows better function of differential amplifier |
|
Definition
| Clean; gel; paste; attach; Impedance; 5000; 2000; mismatch; Similar |
|
|
Term
| -A single channel set-up requires ___ electrodes |
|
Definition
| 3 (inverting, noninverting, ground); |
|
|
Term
Simultaneous single and double channel recording:
-Uses a ___ ___ to connect both noninverting electrode sites
-Each ear serves as ___ for separate differential amplifiers |
|
Definition
|
|
Term
Filters:
-Remove unwanted ___ activity / eliminate ___ energy not within AEP of interest
-Not the same as filtering the ___ stimulus
-Filtering set to limit background ___ or ___ noise/activity
-Usually a ___ ___ filter to allow frequency range of desired evoked potential of interest
-Settings of filter vary based on ____ |
|
Definition
| electrical; spectral; acoustic; physiologic; electric; band pass; AEP |
|
|
Term
Artifact Rejection:
-___ voltage or noise
-Ignore ___
-Average only sweeps or trials in which recording meets level of ___ noise
-Exclude large ___ activity |
|
Definition
| Excess; sweeps; tolerable; muscle |
|
|
Term
| Attempt to stop the recording to reduce the amount of noise let in |
|
Definition
|
|
