Lecture 3 - Neuroimaging - Quiz 1/2

Question 1

Which neuroimaging method is a form of structural brain imaging?

Answer 1

Magnetic resonance imaging (MRI)

Question 2

Which neuroimaging method is the best for imaging the vascular system of the brain?

Answer 2

Helical CT angiogram

Question 3

Which neuroimaging method provides the most information about fiber tracts in the brain?

Answer 3

Diffuse tensor imaging (DTI)

Question 4

Which neuroimaging methods use radioactive materials?

Answer 4

Single photon emission computed tomography (SPECT), positron emission tomography (PET)

Question 5

What does computed tomography (CT) use to image brain structures?

Answer 5

X-rays

Question 6

Functional magnetic resonance imaging (fMRI) is possible due to the artifact created by what?

Answer 6

Magnetic signals created by current flow

Question 7

Which neuroimaging method can be used to image benzodiazepine and dopamine receptors?

Answer 7

Positron emission tomography (PET)

Question 8

Which neuroimaging method disrupts brain activity?

Answer 8

Transcranial magnetic stimulation (TMS)

Question 9

Which neuroimaging method has the potential to reveal the criticality of a brain area to generation of an observed behavioral response?

Answer 9

Transcranial magnetic stimulation (TMS)

Question 10

Which neuroimaging method can be used with patients with metal implants?

Answer 10

Electroencephalogram (EEG)

Question 11

Which neuroimaging method involves changes of electrical potential differences at the scalp?

Answer 11

Electroencephalogram (EEG)

Question 12

T/F - EEG and EMG provide a direct measure of neural activity.

Answer 12

True

Question 13

T/F - EEG and MEG provide a direct measure of blood flow

Answer 13

False

Question 14

T/F - EEG and MEG provide a direct measure of underlying anatomical structure

Answer 14

False

Question 15

What does an MEG signal measure?

Answer 15

Changes in magnetic flux at the scalp generated by electrical current in the brain

Question 16

T/F - Cortical generators of MEG/EEG signals are so sensitive that they can see firing of individual neurons

Answer 16

False

Question 17

T/F - The largest contribution to cortical generators of MEG/EEG signals comes from post-synaptic currents in pyramidal cell dendrites

Answer 17

True

Question 18

T/F - Glial currents are significant cortical generators of MEG/EEG signals and can be easily identified in data

Answer 18

False

Question 19

T/F - There must be some synchronization of activity across thousands of neurons in order to generate MEG/EEG signals

Answer 19

True

Question 20

What does tDCS stand for?

Answer 20

Transcranial direct current stimulation

Question 21

What are some of the advantages of tDCS as compared to other neuroimaging methods?

Answer 21

It’s low risk, minimally invasive, inexpensive, and easy to use

Question 22

T/F - tDCS induces neuronal firing

Answer 22

False

Question 23

T/F - tDCS requires a battery and electrodes to operate

Answer 23

True

Question 24

In repetitive TMS, does low frequency (<5Hz) stimulation increase or decrease cortical inhibition?

Answer 24

Increase

Question 25

In repetitive TMS, does high frequency (>10Hz) stimulation increase or decrease cortical inhibition?

Answer 25

Decrease