Brain Imaging

Question 1

Structural vs Functional Imaging?

Answer 1

Structural imaging= provide picture of brain anatomy

Functional imaging=provide picture of brain activity

Question 2

X-rays and Computed Tomography (CT) are…

Answer 2

structural images based on differential absorption of x-rays by different tissues

Question 3

Magnetic resonance imaging (MRI) is…

Answer 3

based on differential hydrogen/proton densities in different tissues

Question 4

What is a common contrast agent?

Answer 4

Gadolinium

Question 5

Diffusion Tensor Imaging (DTI) is…

Answer 5

Structural MRI technique based on ability of water molecules to diffuse in different directions in white matter

Question 6

Positron Emission Tomography (PET) is…

Answer 6

functional technique that images uptake of radioactive isotope in active neural tissue, requires injection of a isotope (Glucose, Oxygen)

Question 7

Functional Magnetic Resonance Imaging (fMRI) is…

Answer 7

functional technique that detects changes in regional cerebral blood flow, the neural activity changes the local ratio of oxygenated blood to deoxygenated blood,; leads to change in MR signal

Question 8

Electrocorticography is…

Answer 8

an invasive technique that uses electrode grids placed on cortical surface to zero in on locations

Question 9

EEG sensors use_____

MEG sensors use_____

Answer 9

Electrodes

Superconducting quantum interference device (SQUID)

Question 10

Transcranial magnetic stimulation (TMS) uses…

Answer 10

magnetic field to induce current flow of neurons in the brain.