Chapter 5

Question 1

Contrast Xray (xray based)

Answer 1

Inject radio-opaque material into structure of interest
ex. cerebal angiogram

Question 2

computed tomography (xray based)

Answer 2

-3d
-not hd

Question 3

Positron emission tomography (PET) (radioactivity based)

Answer 3

–Highlights brain activity
–Injection 2-deoxyglucose
–Active neurons take up 2-deoxyglucose

Question 4

Magnetic resonance imaging (MRI) (magneticfield based)

Answer 4

–Higher resolution than CT
–Measures waves emitted by hydrogen atoms

Question 5

Diffusion tensor imaging (DTI) (magneticfield based)

Answer 5

–Images axonal tracts
–Based on rapid diffusion of water molecules
–Allows viewing of interconnectivity

Question 6

Functional magnetic resonance imaging (fMRI) (magneticfield based)

Answer 6

–More advantageous than PET
–Signals are called “BOLD Signals”
–Too slow to catch some neural activity

Question 7

Functional ultrasound imaging (fUS)

Answer 7

–Sound waves measure changes in blood volume
–Cheap, portable, used across a variety of people

Question 8

Transcranial Stimulation

Answer 8

*Transcranial magnetic stimulation (TMS)
*Transcranial electrical stimulation (tES)
*Transcranial direct current stimulation (tDCS)

Question 9

Scalp electroencephalography (EEG)

Answer 9

–Measured by scalp electrodes
–Event-related potentials (ERPs)
–Sensory evoked potentials
–Signal averaging
–P300 wave

Question 10

Magnetoencephalography (MEG)

Answer 10

–Measures magnetic field on the surface of the scalp