Save
Psychology
Research methods
Biological research methods
Save
Share
Learn
Content
Leaderboard
Share
Learn
Created by
Maria Peskett
Visit profile
Cards (12)
FMRI scans use a powerful
magnetic field radio frequency
that produces detailed pictures of brain structure
FMRI produces images of brain activity and functioning by showing the
metabolic change
that take place in an active part of the brain
Firm detects the changes in
blood oxygenation.
When our brain is more accurate it consumes
more
oxygen and an
increase
of
demand
of
blood flow
BOLD (
blood
oxygen
level
dependent
).
High
bold contrast can prove it has a role in producing the behaviour
Advantages of FMRI scans
Non invasive
Doesn't
expose
radiation
like pet and cat scans
Its very
precise
Weaknesses of FMRI scans
Can't look at the actual
receptors
of
neurotransmitters
unlike PET
Analysing and interpreting is
skilful
High quality images
are only acquired if patient remains perfectly still
CAT scans
use
X-rays
to create a
3d structural image
of the brain. It records the amount of radiation being absorbed in a
doughnut
shaped machine
CAT scanning can check for
brain tumours
Bleeding
,
brain injury
and
skull fractures
Diseases
and
malformations
Strengths of CAT scanning
Less harmful than
PET
Its
non invasive
and not
painful
Extremely
detailed
images - precise link to a
cognitive disfunction
and which area of the brain caused it
Less sensitive to
movement
Weaknesses of CAT
Slight chance of
cancer
Doesn't pick up on
membranes
covering the
brain
PET scans use a
radiotracer
(
radioactive glucose
) to see which part of the brain accumulates
more
glucose
PET scans
are used for
Evaluating
brain abnormalities
Map
normal human brain functions