experimental approaches

Question 1

transcranial magnetic stimulation TMS

Answer 1

inactivating part of the brain for a short amount of time without being intrusive. it looks at function of a specific region

Question 2

CT scan

Answer 2

uses XRAYS to show structure of brain- takes a picture. downside is that it doesn’t measure function and the picture isn’t that great

Question 3

MRI

Answer 3

uses magnetic fields to take picture, resolution better than CT scan. looks at STRUCTURE better than CT. gives more detail and can see SOFT TISSUE

Question 4

PET

Answer 4

uses GAMMA RAYS. positrons slam into electrons. can see RECEPTORS OR PROTEINS in the brain. shows STRUCTURE AT CELLULAR LEVEL

Question 5

DTI

Answer 5

uses MAGNETS to look at DIFFUSION OF WATER, CAN LOOK AT AXONS/ white matter tracts or connections in the brain. different colors refer to density of fibers

Question 6

4 types of imaging that looks at structural components

Answer 6

CT, MRI, PET, DTI

Question 7

describe 2 techniques for function of electrical activity in animals/humans

Answer 7

EEG- inserting electrodes to pick up electrical activity of cortext cap.

FmRI- functional- shows function and what part of brain is active. look at blood flow to direct function of certain regions. the more active the more blood flow.

Question 8

histology

Answer 8

can look at specific proteins. similar to PET in humans. looks at neurotransmitters

Question 9

microdialysis

Answer 9

implant to brain of animals to take fluid out. can look at neurotransmitters in brain. in humans we use PET