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A(n) _______ montage detects voltage differences between single, adjacent electrodes
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A bipolar montage detects voltage differences between single, adjacent
electrodes. The montage consists of multiple bipolar derivations where
no single electrode is common to all derivations. In most cases, the
bipolar derivations are linked.
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The _______ rhythm consists of bursts of alpha or theta waves over the
temporal region of the scalp when subjects are mentally active.
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The kappa rhythm consists of bursts of alpha or theta waves over the
temporal region of the scalp when subjects are mentally active.
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Which term refers to the non-simultaneous occurrence of EEG activity in regions on the same or opposite side of the head?
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Asynchrony refers to the non-simultaneous occurrence of EEG activity in regions on the same or opposite side of the head
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Which term refers to electrical activity that appears at two respective input terminals of a differential amplifier?
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A common mode signal appears at two respective input terminals of a
differential amplifier. Example: 50/60Hz artifact is a common common
mode signal in EEG recording.
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A montage in which the reference electrode is common to multiple derivations is termed a(n) _______montage.
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A montage in which the reference electrode is common to multiple derivations is termed a common reference montage
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Which electrode is placed over the scalp or brain to detect EEG activity?
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An active electrode electrode is placed over the scalp or brain to detect EEG activity.
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Which term refers to the difference between two unlike signals applied
to the respective two input terminals of a differential amplifier?
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A differential signal is the difference between two unlike signals
applied to the respective two input terminals of a differential
amplifier.
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A(n) _______ montage detects the voltage difference between a single
electrode placed in input 1 and the average of the remaining 10-20
electrodes placed in input 2.
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An average reference montage detects the voltage difference between a
single electrode placed in input 1 and the average of the remaining
10-20 electrodes placed in input 2.
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Which term refers to the abrupt appearance and disappearance of a group
of waves that can be discriminated from background activity?
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A burst refers to the abrupt appearance and disappearance of a group of
waves that can be discriminated from background activity.
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Which rhythm ranges from 7-11 Hz and is detected over the central or
centro-parietal regions of the scalp when a patient is awake?
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The mu rhythm ranges from 7-11 Hz and is detected over the central or
centro-parietal regions of the scalp when a patient is awake. This
rhythm is composed of arch-shaped waves that can be blocked or weakened
by contralateral movement or the intention to move.
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Which electrode is typically connected to input terminal 2 of an EEG
amplifier and used to measure the potential variations of another
electrode?
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A reference electrode is typically connected to input terminal 2 of an
EEG amplifier and used to measure the potential variations of an active
electrode.
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Which montage consists of referential derivations?
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A referential montage consists of referential derivations (pairs of
electrodes including an active electrode placed in input terminal 1 and
reference electrode placed in input terminal 2 of an EEG amplifier).
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Which montage detects voltage differences between a single electrode and
an average of the remaining electrodes weighted in proportion to their
distance from the electrode placed in input 1?
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A Laplacian montage detects voltage differences between a single
electrode and an average of the remaining electrodes weighted in
proportion to their distance from the electrode placed in input 1.
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A _______ refers to both the process of recording from a pair of electrodes in an EEG channel and the resulting EEG record.
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A derivation refers to both the process of recording from a pair of electrodes in an EEG channel and the resulting EEG record
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Which montage permits the best analysis of asymmetry?
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A common reference montage achieves good analysis of asymmetry provided
that there is symmetrical placement of the reference electrode(s).
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