Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

EEG test prep > Part 1 > Flashcards

Part 1 Flashcards

1
Q

How much deflection will occur if a 100uV spike is recorded at a sensitivity of 10uV/mm and HFF 70Hz, LFF 0.5Hz

A

10mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How much voltage would be recorded if 25uV beta activity is recorded using a LFF of 1Hz

A

25uV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

An asymmetry of the occipital alpha rhythm voltage from the two hemispheres should be no greater than _______.

A

50%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which of the following best describes lambda waves:

a. 8-10 Hz activity present in central regions
b. posterior, polyphasic waves seen in adolescents
c. transients in the occipital regions present with visual scanning
d. Delta waves that phase reverse at the vertex

A

c. transients in the occiptal regions present with visual scanning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The ratio of chest compressions to breaths in one-person CPR is _______.

A

30:2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When performing an EEG for evaluation of a central nervous system disease that may have infectious etiology, the tech should ________.

A

observe universal precautions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What term is used to describe brainstem injury in a patient who is completely paralyzed except for vertical eye movement:

A

Locked-in syndrome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which condition is characterized by rigidity, tremors, and festination?

A

Parkinson’s disease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which of the following is NOT a characteristic of REM sleep:

a. low-voltage mixed frequency EEG activity
b. reduced EMG activity
c. sawtooth waves
d. K-complexes

A

d. K-complexes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The presence of sleep spindles and V waves in the EEG signals what stage of sleep?

A

stage II

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A family history of epilepsy is especially important to determine the diagnosis of _______.

A

classic absence seizures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Activation of an absence seizure is most consistently obtained during _________.

A

hyperventilation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Photic driving ________.

A

may or may not be present in a normal EEG recording.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A recommended method of monitoring infusion motor artifact from intravenous (IV) infusion pumps is to place two electrodes on ___________.

A

the infusion pump apparatus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following medications can commonly cause increased theta and beta activity at therapeutic doses:

a. antidepressants
b. chloral hydrate
c. analgesics
d. antihistamines

A

a. antidepressants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Of the following, which would be the most beneficial in evaluating suspected narcolepsy:

a. pneumoencephalography
b. electroencephalography
c. all night polysomnography
d. multiple sleep latency test

A

d. multiple sleep latency test

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The sleep disorder that occurs most commonly in the adult population is _______.

A

sleep apnea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Electrocerebral inactivity is defined as no electrical activity greater than _______.

A

2.0 uV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

ACNS guidelines 2006 state that vertical scaling on digital EEG instruments should have a minimum of ___ per channel when displaying up to ___ channels.

A

10mm, 21

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Cancellation occurs when ________.

A

the voltage in input 1 is the same as the voltage in input 2.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

In an EEG instrument, what component transforms alternating current into direct current?

A

the power supply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

A longer time constant results in _________.

A

more slow frequencies recorded

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

A small fluctuating output recorded by the EEG instrument even when there is no input signal is called _______.

A

noise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

A combination of electronic components designed to increase the power, voltage, or current of a signal

A

amplifier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Which of the following is NOT a valid expression of Ohm's law? (in this equation, E [electromotive force] is the same as V [voltage]) a. R=EI or R=VI b. E=IR or V=IR c. I=E/R or I=V/R d. R=E/I or R=V/I
a. R=EI or R=VI
26
What is the action of a capacitor?
It stores energy
27
The EEG amplifier is designed so that when input 1 is more than input 2, the deflection will be:
upward
28
The homunculus is ____________.
a representation of the motor and sensory cortex of the brain
29
The basic unit of resistance is the _____.
ohm
30
The term RAM means:
temporary memory storage that is critical to rapid computer operations
31
The foramen of Munro is the ___________.
opening between lateral ventricles and third ventricle of the brain
32
A malignant tumor primarily seen in children may be _________.
medulloblastoma.
33
A patient with sensory aphasia will have difficulty ___________.
comprehending the meaning of words or phrases.
34
Port wine stain is associated with _________.
Sturge-Weber syndrome
35
A patient complaining of right hemiplegia will have ______________.
difficulty moving the right half of the body.
36
Interictal discharges in patients with complex partial seizures are most likely to be recorded in the EEG during:
stage I sleep
37
Herniation of the uncus results in the compression of which cranial nerve?
third
38
Increasing depth of anesthesia causes which of the following sequences of EEG changes: a. increased beta then intermixed theta then delta, with burst suppression if anesthesia is deep enough b. burst suppression then delta then theta c. loss of alpha then increased theta then widespread beta d. delta then widespread beta then burst suppression
a. increased beta then intermixed theta then delta, with burst suppression if anesthesia is deep enough
39
The tracts connecting the right and left hemisphere are called _______.
basil ganglia
40
A circuit that allows some frequencies to pass through it, while others are blocked is a __________.
filter
41
Which of the following is related to an alpha coma pattern: a. reactivity to external stimuli b. usually indicates a good prognosis c. is only present when the patient is alert and oriented d. an atypical distribution of alpha
d. an atypical distribution of alpha
42
Six to seven Hz theta activity is typically seen in a normal adult in which of the following: a. in the occipital regions b. in the centro-temporal regions during photic stimulation c. at the onset of drowsiness d. in low voltage, paroxysmal bursts over the frontal regions
c. at the onset of drowsiness
43
Normal alpha, in an adult, should NOT be seen __________.
in the frontal head regions
44
How will changing the time base/epoch/equivalent paper speed from 10 sec to 20 sec alter a 12 Hz alpha rhythm?
It will be compressed (bunched up)
45
Give a false statement about current.
Current is measured in coulombs.
46
In a referential montage with Cz as the reference, what is the most valuable localizing feature?
highest voltage discharge
47
Low frequency filters are also called __________.
high pass filters
48
Of the following filter combinations, which would best record 3/sec spike and slow wave discharge: a. HFF 15 Hz/LFF 5 Hz b. HFF 35 Hz/LFF 5 Hz c. HFF 70 Hz/LFF 1 Hz d. HFF 35 Hz/LFF 0.5 Hz
c. HFF 70 Hz/LFF 1 Hz
49
Time constant is expressed in __________.
seconds
50
When 60 Hz interference is seen on an EEG recording, what should be checked first?
the electrode impedance
51
What kind of amplifiers are used to record biological signals?
differential
52
If the epoch/time base/equivalent paper speed is set for 20 sec per screen, one screen would be divided into 10 subdivisions and each subdivision would equal __________.
2 seconds
53
When recording for ECI, interelectrode impedances should be at least ____ ohms, but less than ____ ohms.
100; 10,000
54
The basic unit for measuring current flow is the _____.
ampere
55
The filters creating a very narrow band pass that should rarely be used clinically are __________.
LFF 5 Hz and HFF 15 Hz
56
When recording for electrocerebral inactivity (ECI), the interelectrode distance should be at least _______.
10 cm
57
What is NOT a source of 60 Hz interference?
intravenous drip
58
Name a nonphysiological artifact.
60 Hz interference
59
Eye leads place at the outer canthus of each eye will record ________.
mainly horizontal eye movements
60
The best metals for clinical EEG recording are ____________.
silver-silver chloride, platinum, and gold
61
Which electrodes do NOT record directly from the brain?
subdermal
62
The distance from Cz to Pz is 6.8 cm. What is the distance from nasion to inion?
34 cm
63
In a referential montage, how is the origin of the potential determined?
amplitude
64
Due to a central scalp lesion, C4 has to be relocated 4 mm anteriorly. The tech should ___________.
relocate C3 4mm anteriorly
65
In the illustration, which electrode is active and what is the polarity? ``` F7-A1 -----v----- F8-A2 ------------ F3-A1 -----v----- F4-A2 ------------ P3-A1 -----v----- P4-A2 ------------ ```
A1 negative
66
According to the ACNS guidelines 2006, the minimum sampling rate for EEG data, should be at least ___ times the highest high frequency filter setting.
three
67
In a record with 10 Hz alpha activity, when the display epoch is changed from 10 sec per display screen to 20 sec per display screen, the frequency of the activity will be ______.
10 Hz
68
A megabyte of memory is approximately equal to ______.
one million bytes
69
Inflammation of the coverings of the brain or spinal cord is called ______.
meningitis
70
The most common symptoms of which type of head injury are a temporary loss of consciousness, followed by confusion, severe headache, and possibly amnesia for the accident?
concussion

EEG test prep (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions