Clinical EEG ACNS guidelines
To display the distribution of EEG activity, it is necessary to
record____________________ from as many regions of the scalp as possible. - answer
simultaneously
_______________ channels of simultaneous recording are considered the MINIMUM
number required to show the areas producing most normal and abnormal EEG patterns.
- answerSixteen !
In the usual EEG clinical setting, electrical shielding of the patient and equipment is
_____ necessary, and such shielding need not be installed unless proven necessary. -
answerNOT
List the advantages to Digital EEG recording over Paper - answergreater sensitivity,
greater reliability, the possibility of postrecording modification of EEG waveform
rendering (gain, filters, montage), and more efficient EEG storage.
What is the best application for EEG electrodes? - answerExperimental evidence
suggests that silver—silver chloride or gold disk electrodes held on by collodion are the
best
Electrodes must be disinfected with appropriate procedures and transmission-based
precautions taken after recording from patients with________________
_____________ - answercontagious diseases
For EEG, Needle electrodes are __________ recommended for routine clinical use. -
answerNOT
Why are needle electrodes NOT recommended for clinical EEG use - answer-patient
discomfort
-risk of injury
-Needle electrodes have HIGHER impedances than appropriately applied cup
electrodes
-due to higher impedance, needle electrodes also have potentially higher levels of noise
___________ __________ _____________ or ____________ _______________ may
be used for prolonged recording of EEG in stuporous or comatose patients in situations
where application of cup electrodes is not feasible because of personnel or time
constraints. - answerSubdermal needle electrodes (SNE)
wire electrodes (SWE)
, ______ electrodes are the Recommended number of electrodes used for an EEG -
answer21!
The ____________ System is the only one officially recommended by the IFCN -
answer10 to 20 system
__________________ is the most commonly used system and should be used
universally. - answer10 to 20 system
Occasionally, additional electrodes, placed between or below those representing the
standard placements, are needed to record ____________ activity better. The
____________ System provides a standardized option for selecting additional
electrodes. - answerlocalized
10 to 10
In every case, an isolated_____________electrode should be placed and connected to
the jackbox as specified by the manufacturer. - answerGROUND
An isolated ground electrode: - answerdoes not allow dangerous currents to pass and is
not a safety hazard as were earth grounds used in early analog EEG devices.
____ electrode should ever be connected to the chassis of the equipment or to the earth
ground. - answerNO
In addition, most digital equipment requires one or more system _______________
electrodes. These should be placed as suggested by the manufacturer. -
answerreference
Interelectrode impedances should be checked as a routine____________________
procedure - answerprerecording
With modern digital EEG recording equipment, impedances up to____ k Ohms are
acceptable, but optimal recording still requires impedances that are ___________ -
answer10
balanced
________________ impedances compromise the ability of an EEG amplifier to
__________ potentials that are the same at a pair of electrodes while amplifying those
that are different (common mode rejection). - answerUnbalanced
reject
Impedances should also not be below _____ Ohms because this usually indicates a
shunt or short circuit, possibly related to a__________ ______________ on the scalp -
answer100
salt bridge
To display the distribution of EEG activity, it is necessary to
record____________________ from as many regions of the scalp as possible. - answer
simultaneously
_______________ channels of simultaneous recording are considered the MINIMUM
number required to show the areas producing most normal and abnormal EEG patterns.
- answerSixteen !
In the usual EEG clinical setting, electrical shielding of the patient and equipment is
_____ necessary, and such shielding need not be installed unless proven necessary. -
answerNOT
List the advantages to Digital EEG recording over Paper - answergreater sensitivity,
greater reliability, the possibility of postrecording modification of EEG waveform
rendering (gain, filters, montage), and more efficient EEG storage.
What is the best application for EEG electrodes? - answerExperimental evidence
suggests that silver—silver chloride or gold disk electrodes held on by collodion are the
best
Electrodes must be disinfected with appropriate procedures and transmission-based
precautions taken after recording from patients with________________
_____________ - answercontagious diseases
For EEG, Needle electrodes are __________ recommended for routine clinical use. -
answerNOT
Why are needle electrodes NOT recommended for clinical EEG use - answer-patient
discomfort
-risk of injury
-Needle electrodes have HIGHER impedances than appropriately applied cup
electrodes
-due to higher impedance, needle electrodes also have potentially higher levels of noise
___________ __________ _____________ or ____________ _______________ may
be used for prolonged recording of EEG in stuporous or comatose patients in situations
where application of cup electrodes is not feasible because of personnel or time
constraints. - answerSubdermal needle electrodes (SNE)
wire electrodes (SWE)
, ______ electrodes are the Recommended number of electrodes used for an EEG -
answer21!
The ____________ System is the only one officially recommended by the IFCN -
answer10 to 20 system
__________________ is the most commonly used system and should be used
universally. - answer10 to 20 system
Occasionally, additional electrodes, placed between or below those representing the
standard placements, are needed to record ____________ activity better. The
____________ System provides a standardized option for selecting additional
electrodes. - answerlocalized
10 to 10
In every case, an isolated_____________electrode should be placed and connected to
the jackbox as specified by the manufacturer. - answerGROUND
An isolated ground electrode: - answerdoes not allow dangerous currents to pass and is
not a safety hazard as were earth grounds used in early analog EEG devices.
____ electrode should ever be connected to the chassis of the equipment or to the earth
ground. - answerNO
In addition, most digital equipment requires one or more system _______________
electrodes. These should be placed as suggested by the manufacturer. -
answerreference
Interelectrode impedances should be checked as a routine____________________
procedure - answerprerecording
With modern digital EEG recording equipment, impedances up to____ k Ohms are
acceptable, but optimal recording still requires impedances that are ___________ -
answer10
balanced
________________ impedances compromise the ability of an EEG amplifier to
__________ potentials that are the same at a pair of electrodes while amplifying those
that are different (common mode rejection). - answerUnbalanced
reject
Impedances should also not be below _____ Ohms because this usually indicates a
shunt or short circuit, possibly related to a__________ ______________ on the scalp -
answer100
salt bridge
