Lecture 8 - Research Methods

Question 1

CT scan (computerized tomography)

Answer 1

Computer assisted X ray procedure (photographs from all angles)

Question 2

MRI (magnetic resonance imaging)

Answer 2

-Strong magnetic fields
-H atom proton spins align (lipid molecules)
-radiofréquence waves
-protons absorb energy, change direction of spin
-emit own radio waves, spin flips back
-find location waves, relative density of proton (most prélèvent in fat & water)
-> 3D image of brain (high spatial resolution)

Question 3

DTI imaging (diffusion tensor imaging)

Answer 3

Direction & speed of diffusion water
-axon tracts
(H atom protons from water molecules)

Question 4

fMRI (functional magnetic resonance imaging)

Answer 4

-magnetic field distortions-> oxygenated blood-> blood flow & neural activity

Question 5

PET scan (Positron émission tomography)

Answer 5

Radioactive sugar injected -> changes in energy (2-DG)

Question 6

EEG (electroencephalogram)

Answer 6

Measure of electrical activity in brain using macroelectrodes
Detect Specific patterns