functional Magnetic Resonance Imaging (fMRI)

Question 1

functional Magnetic Resonance Imaging (fMRI)

Answer 1

Blood with oxygen (oxyhemoglobin) has different magnetic properties than that without. Active areas use more so the magnetic field measures the BOLD signals

Question 2

BOLD signals

Answer 2

Blood Oxygenation Level-Dependent signals. The changes in properties of oxygen in the blood are detected. The changes is caused by increase of used oxygen

Question 3

Magnetic field

Answer 3

The magnet causes the protons in the brain to allign. With small pulses these are shifted out, and the scanner measures how long it takes to get back (this differs based on oxygen level)

Question 4

Event related disigns

Answer 4

Change conditions on a trial by trial level. Like how does the previous affect the following

Question 5

Advantage

Answer 5

No need to wait as long like PET, BOLD takes about 12s.

Advancing fast, lots of types of analysis techniques are learned to see which areas behave similarly or decomposing activation patterns

Modelling structure and dynamics (causal) by incorporating anatomical/functional connections

Question 6

Disadvantage

Answer 6

Very expensive

Question 7

MR scanner

Answer 7

Can be used for Diffusion tensor imaging (DTI): reveals the white matter tracts of the brain