EEG Mock Exam: Trivia Quiz!

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| By Cardop53

Cardop53

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Quizzes Created: 1 | Total Attempts: 10,596

Questions: 13 | Attempts: 10,596 | Updated: Mar 21, 2023

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Questions and Answers

1.

The basic unit for measuring current flow is:
- A.
  
  Atomic weight
- B.
  
  Coulomb
- C.
  
  Volt
- D.
  
  Ampere
Correct Answer
D. Ampere

Explanation
The basic unit for measuring current flow is Ampere. Ampere is a unit of electric current in the International System of Units (SI). It is defined as the amount of electric charge that flows through a conductor in one second when there is a constant potential difference of one volt across the conductor. It is named after the French physicist André-Marie Ampère, who made significant contributions to the field of electromagnetism.

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2.

The basic unit of resistance is:
- A.
  
  Ohm
- B.
  
  Coulomb
- C.
  
  Ampere
- D.
  
  Volt
Correct Answer
A. Ohm

Explanation
The basic unit of resistance is Ohm. Resistance is a measure of how much a material or device impedes the flow of electric current. The Ohm is the unit used to quantify this resistance. It is named after the German physicist Georg Simon Ohm, who formulated Ohm's law, which describes the relationship between voltage, current, and resistance in an electrical circuit. The Ohm is commonly represented by the symbol Ω.

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3.

A circuit that allows some frequencies to pass through it while others are blocked is a:
- A.
  
  Resistor
- B.
  
  Transistor
- C.
  
  Filter
- D.
  
  Reactor
Correct Answer
C. Filter

Explanation
A filter is a circuit that selectively allows certain frequencies to pass through while blocking others. It is designed to modify the amplitude and/or phase characteristics of a signal, depending on its frequency content. Filters are commonly used in audio systems, telecommunications, and electronic devices to remove unwanted noise or to separate different frequency components of a signal. Unlike resistors and transistors, which are basic electronic components with different functions, a filter specifically refers to a circuit that performs frequency-selective operations.

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4.

Which of the following describes the action of a capacitor?
- A.
  
  Opposes changes in current flow
- B.
  
  Converts alternating current to direct current
- C.
  
  Creates a direct current resistance
- D.
  
  Stores energy
Correct Answer
D. Stores energy

Explanation
A capacitor is an electronic component that stores electrical energy in an electric field. When a capacitor is connected to a power source, it charges up and stores the energy in the form of an electric field between its two plates. This stored energy can be released later on when the capacitor is discharged. Therefore, the correct answer is "stores energy."

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5.

In a record with 10-hertz alpha activity. When the display epoch is changed from 10 seconds per display screen to 20 seconds per display screen, the frequency of the activity will be:
- A.
  
  5 hz
- B.
  
  15 hz
- C.
  
  20 hz
- D.
  
  10 hz
Correct Answer
D. 10 hz

Explanation
When the display epoch is changed from 10 seconds per display screen to 20 seconds per display screen, the frequency of the activity will remain the same at 10 Hz. The frequency of the alpha activity is determined by the brain's electrical activity, which is not affected by the duration of the display epoch. Therefore, the change in the display epoch will not alter the frequency of the alpha activity, and it will still be 10 Hz.

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6.

A partial seizure:
- A.
  
  Arises from a localized area of abnormality in one part of the brain
- B.
  
  Is so minor it is of no practical consequences
- C.
  
  Usually produces a brief mental "absence"
- D.
  
  Only occurs, with high temperature in infants
Correct Answer
A. Arises from a localized area of abnormality in one part of the brain

Explanation
A partial seizure is a type of seizure that originates from a specific area of abnormality in the brain. Unlike generalized seizures that involve the entire brain, partial seizures are localized and affect only a specific part of the brain. These seizures can vary in intensity and symptoms, but they typically do not cause major physical consequences. However, they can result in a brief mental "absence" or altered consciousness. It is important to note that partial seizures can occur in individuals of any age and are not limited to infants with high temperatures.

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7.

The olfactory aura preceding a major seizure is:
- A.
  
  The hallucination of an unpleasant smell
- B.
  
  A false sense of familiarity with the current situation
- C.
  
  A dream-like sense of strangeness
- D.
  
  A continual ringing sound in the patients ears
Correct Answer
A. The hallucination of an unpleasant smell

Explanation
The olfactory aura preceding a major seizure refers to the hallucination of an unpleasant smell. This means that individuals experiencing this type of aura may perceive a smell that is not actually present. This phenomenon is a common symptom experienced by some individuals with epilepsy before a seizure occurs. It is important to note that not all individuals with epilepsy will experience an olfactory aura, as auras can vary greatly between individuals.

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8.

Which structure will most likely be affected first by an anoxic insult?
- A.
  
  Brainstem
- B.
  
  Spinal cord
- C.
  
  Cortex
- D.
  
  Cerebellum
Correct Answer
C. Cortex

Explanation
The cortex is the outer layer of the brain responsible for higher cognitive functions such as thinking, memory, and perception. It is highly metabolically active and requires a constant supply of oxygen. An anoxic insult refers to a lack of oxygen supply to the brain. Therefore, the cortex, being highly dependent on oxygen, will most likely be affected first by an anoxic insult. This can lead to impaired cognitive function and potentially severe neurological deficits.

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9.

Beta in the Electroencephalogram will more likely be caused by:
- A.
  
  Diazapam
- B.
  
  Phenytoin
- C.
  
  Cimetidine
- D.
  
  Amitryptyline
Correct Answer
A. Diazapam

Explanation
Diazepam is a benzodiazepine medication that is commonly used as a sedative or anti-anxiety medication. It works by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain. Increased levels of GABA can lead to a decrease in brain activity, which can be observed as an increase in beta waves in an electroencephalogram (EEG). Therefore, Diazepam is more likely to cause an increase in beta waves in the EEG.

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10.

FIRDA is seen in:
- A.
  
  Children
- B.
  
  Adults
- C.
  
  Full term neonates
- D.
  
  Preterm infants
Correct Answer
B. Adults

Explanation
FIRDA, which stands for Frontal Intermittent Rhythmic Delta Activity, is a pattern of brainwave activity observed in adults. It is characterized by intermittent bursts of slow delta waves in the frontal region of the brain. This pattern is commonly seen in adults during various neurological conditions such as brain tumors, strokes, or encephalopathies. It is not typically seen in children, full-term neonates, or preterm infants.

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11.

The central vertex electrode is:
- A.
  
  C3
- B.
  
  CZ
- C.
  
  C4
- D.
  
  FPZ
Correct Answer
B. CZ

Explanation
The central vertex electrode, CZ, is located at the midline of the scalp, exactly halfway between the nasion and the inion. It is commonly used as a reference or ground electrode in EEG recordings. The electrode placement at CZ allows for a balanced recording of electrical activity from both hemispheres of the brain, making it a suitable choice for analyzing overall brain activity.

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12.

During the recording of cerebral activity, the calibration input voltage is changed from 50uv to 100uv. What will the results be?
- A.
  
  No effect on the activity being recorded
- B.
  
  A two-fold increase in amplitude
- C.
  
  A one-fold reduction of amplitude
- D.
  
  Clipping of the waveform
Correct Answer
A. No effect on the activity being recorded

Explanation
The calibration input voltage is used to determine the relationship between the recorded electrical activity and the actual voltage being measured. Changing the calibration input voltage from 50uv to 100uv does not affect the actual activity being recorded. It only changes the scale or sensitivity of the recording system. Therefore, the activity being recorded remains unaffected.

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13.

According to the ACNS Guidelines, the minimum sampling rate for EEG data, it should be at least _________ times the highest high-frequency filter setting.
- A.
  
  Two
- B.
  
  Three
- C.
  
  Four
- D.
  
  Five
Correct Answer
B. Three

Explanation
According to the ACNS Guidelines, the minimum sampling rate for EEG data should be at least three times the highest high-frequency filter setting. This ensures that the sampling rate is sufficient to accurately capture and represent the high-frequency components of the EEG signal. Sampling at a rate lower than three times the high-frequency filter setting may result in loss of important information and distortion of the signal.

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Current Version
Mar 21, 2023

Quiz Edited by
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Feb 22, 2010

Quiz Created by
Cardop53

EEG Mock Exam: Trivia Quiz!

The basic unit for measuring current flow is:

The basic unit of resistance is:

A circuit that allows some frequencies to pass through it while others are blocked is a:

Which of the following describes the action of a capacitor?

In a record with 10-hertz alpha activity. When the display epoch is changed from 10 seconds per display screen to 20 seconds per display screen, the frequency of the activity will be:

A partial seizure:

The olfactory aura preceding a major seizure is:

Which structure will most likely be affected first by an anoxic insult?

Beta in the Electroencephalogram will more likely be caused by:

FIRDA is seen in:

The central vertex electrode is:

During the recording of cerebral activity, the calibration input voltage is changed from 50uv to 100uv. What will the results be?

According to the ACNS Guidelines, the minimum sampling rate for EEG data, it should be at least _________ times the highest high-frequency filter setting.