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Neural Basis of Neuroimaging Techniques

Description: This quiz is designed to assess your understanding of the neural basis of neuroimaging techniques, including fMRI, EEG, MEG, and PET. The questions cover various aspects of these techniques, such as their principles, applications, advantages, and limitations.
Number of Questions: 15
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Tags: neuroimaging fmri eeg meg pet neural basis
Attempted 0/15 Correct 0 Score 0

Which neuroimaging technique measures brain activity by detecting changes in blood oxygenation levels?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: A
Explanation:

fMRI (functional magnetic resonance imaging) measures brain activity by detecting changes in blood oxygenation levels, which are associated with neural activity.

What is the primary physiological signal measured by EEG?

  1. Blood oxygenation

  2. Electrical activity

  3. Magnetic fields

  4. Glucose metabolism


Correct Option: B
Explanation:

EEG (electroencephalography) measures brain activity by detecting electrical activity on the scalp, which is generated by the synchronized firing of neurons.

Which neuroimaging technique measures brain activity by detecting magnetic fields generated by neural currents?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: C
Explanation:

MEG (magnetoencephalography) measures brain activity by detecting magnetic fields generated by neural currents, which are associated with neural activity.

What is the primary physiological signal measured by PET?

  1. Blood oxygenation

  2. Electrical activity

  3. Magnetic fields

  4. Glucose metabolism


Correct Option: D
Explanation:

PET (positron emission tomography) measures brain activity by detecting the distribution of radioactive tracers, which are taken up by neurons and reflect glucose metabolism, an indicator of neural activity.

Which neuroimaging technique has the highest spatial resolution?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: A
Explanation:

fMRI has the highest spatial resolution among the mentioned techniques, allowing for the visualization of brain activity in specific brain regions.

Which neuroimaging technique has the highest temporal resolution?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: B
Explanation:

EEG has the highest temporal resolution among the mentioned techniques, allowing for the measurement of brain activity on a millisecond timescale.

What is the main advantage of fMRI over EEG and MEG?

  1. Higher spatial resolution

  2. Higher temporal resolution

  3. Non-invasive nature

  4. Lower cost


Correct Option: A
Explanation:

fMRI offers higher spatial resolution compared to EEG and MEG, allowing for the visualization of brain activity in specific brain regions.

What is the main advantage of EEG and MEG over fMRI?

  1. Higher spatial resolution

  2. Higher temporal resolution

  3. Non-invasive nature

  4. Lower cost


Correct Option: B
Explanation:

EEG and MEG offer higher temporal resolution compared to fMRI, allowing for the measurement of brain activity on a millisecond timescale.

Which neuroimaging technique is commonly used to study brain connectivity?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: A
Explanation:

fMRI is commonly used to study brain connectivity by measuring the correlations in brain activity between different brain regions.

Which neuroimaging technique is commonly used to study neurotransmitter systems in the brain?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: D
Explanation:

PET is commonly used to study neurotransmitter systems in the brain by using radioactive tracers that bind to specific neurotransmitter receptors or transporters.

What is the main limitation of fMRI?

  1. Low spatial resolution

  2. Low temporal resolution

  3. Invasiveness

  4. High cost


Correct Option: B
Explanation:

The main limitation of fMRI is its low temporal resolution, which limits its ability to capture fast-changing brain activity.

What is the main limitation of EEG and MEG?

  1. Low spatial resolution

  2. Low temporal resolution

  3. Invasiveness

  4. High cost


Correct Option: A
Explanation:

The main limitation of EEG and MEG is their low spatial resolution, which limits their ability to precisely localize brain activity.

Which neuroimaging technique is considered to be invasive?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: D
Explanation:

PET is considered to be invasive because it involves the injection of radioactive tracers into the bloodstream.

Which neuroimaging technique is typically the most expensive?

  1. fMRI

  2. EEG

  3. MEG

  4. PET


Correct Option: D
Explanation:

PET is typically the most expensive neuroimaging technique due to the cost of the radioactive tracers and the specialized equipment required.

What is the primary application of neuroimaging techniques in clinical settings?

  1. Diagnosis of brain disorders

  2. Treatment of brain disorders

  3. Brain-computer interfaces

  4. Neuromodulation


Correct Option: A
Explanation:

The primary application of neuroimaging techniques in clinical settings is the diagnosis of brain disorders, such as stroke, epilepsy, and neurodegenerative diseases.

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