neuroimaging

Question 1

Structural Neuroimaging

Answer 1

Techniques that produce images or scans showing the brains structure or autonomy
-E.g Ct, Mri

Question 2

Functional neuroimaging

Answer 2

-Techniques that provide view of some aspects of brain functions
-Show images of the brain at work
-Provide information on brain structure
-e.g Pet Fmri

Question 3

CT (Computerized tomography)

Answer 3

• Scans the brain at different angles
  -Creates an image showing horizontal cross sections of the brain
  -Patients must be given a substance that highlights the brains blood vessels
• Pros : cheap and quick, useful for locating brain injuries and tumors
• Cons : image only shows brain structure, not as clear as other methods

Question 4

MRI (Magnetic resonance imaging)

Answer 4

-Harmless magnetic fields vibrate atoms to generate a computer image
-Primarily used to diagnose structure abnormalities
-Pros : More sensitive than CT, produced in full color, Safer than x-ray
Cons - cant be used by individuals with pacemakers

Question 5

PET (positron emission tomography)

Answer 5

-Produces color images that show structure, activity and function
-Patients require a glucose injection with a short lived radioactive tracer
-assumes that brain areas that require increased blood flow have increased neuronal activity
-It is color coded to show different levels of blood flow
-Pros : Used to record levels of activity in different brain areas when doing tasks.
Cons: Pet are less detailed than MRI

Question 6

FMRI (Functional magnetic resonance imaging)

Answer 6

-detects and record oxygen consumption across the brain
-Participants engage in tasks while the fMRI records the level of activity in the brain and produces a colored image
-Pro: No Radio active tracers, Covers changes in a matter of seconds, rather than minutes (PET), very detailed and precise
-Cons : Expensive to run