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Stack 1
EEG Study notes
| Question | Answer |
|---|---|
| The function of a differential amplifier is to | amplify the difference in electrical potential between 2 inputs |
| The desirable characteristic of a differential amplifier in which like signals are cancelled is called | common mode rejection |
| No difference in electrical potential is called | equipotential, in phase cancellation, or common mode rejection |
| Current is | the flow of electrons through a pathway and the unit is the ampere |
| Voltage is | the potential charge difference between two points and the unit is the volt |
| A resistor | welcomes any current change |
| The term used to describe the result of differential amplification when both inputs are of equal voltage values is | cancellation |
| The ability of the EEG instrument to output the voltage difference between two inputs to a single channel is known as | differential amplification |
| Resistance | describes the forces opposing direct current flow |
| P.O. stands for | by mouth |
| Impedance | is the opposition to the flow of alternating current |
| The root word "cardio" means | heart |
| The suffix -itis means | inflammation |
| Horizontal resolution refers to the | number of data points that are stored to record a signal in each second across time |
| What term describes the resulting output when two inputs of opposite polarity are subtracted during the differential amplification process? | summation |
| The indentation between the forehead and the nose is the | nasion |
| An EEG instrument's common mode rejection ratio should be | very high |
| When recording for ECI, it is recommended that the sensitivity be ________uV/mm and the low filter should not be higher than ____Hz for at least _____minutes of recording | 2, 1.0, 30 |
| What kind of amplifiers are used to record biological signals? | differential |
| After application of electrodes, the impedance of every electrode should be measured. Impedances___________________. | above 5000 ohms should be reduced by adding electrolyte or replacing the electrode. |
| By changing from a time constant = .05 seconds to a time constant = .1 seconds, the EEG instrument will_____________. | record more slow frequencies |
| When both the negative and positive ends of a generator are recorded during an EEG it is called ______________. | horizontal or tangential dipole |
| A __________________ electrical field is created when the human eye is looking in the direction of one of the anterior temporal electrodes. | positive |
Created by:
RRosenbalm
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