AOS 2 - Neuroimaging techniques Flashcards
What is STRUCTURAL neuroimaging?
Examples?
Obtains detailed images of the anatomy of the brain.
CT & MRI
What is FUNCTIONAL neuroimaging?
Examples?
View the brain ‘live’ during a response, and provide information about both function and structure.
FMRI & PET
What is a Computerised
tomography? (CT)
Combines a series of x-ray images taken from different angles to create cross-sectional images of the body.
What can images from a CT be used for?
3 point
- Locate a brain tumour
- Observe changes in the brain from conditions such as Alzheimer’s or Parkinson’s disease
- Determine the degree of brain injury following an injury or stroke.
What is Magnetic resonance imaging? (MRI)
2 points
Uses magnetic fields to activate atoms in the brain, which then allows a computer to generate an image of the brain.
Images are more detailed and clearer than those produced by CT.
What can images from an MRI be used for?
2 points
- Identify cancerous tissue + signs of a stroke
- Diagnose structural abnormalities
What is Functional magnetic resonance imaging? (fMRI)
Measures oxygen consumption in the brain - with the assumption that blood is more oxygenated in active areas of the brain.
Advantages of fMRI over PET scans?
3 points
- Does not expose participants to radioactive tracers.
- Produces more detailed and accurate pictures
- Produce more images in rapid succession
What is Position emissions
technology? (PET)
2 points
Participant is typically asked to engage in some kind of activity, while images are taken of the ‘live brain’ at work.
Use a colour code to indicate areas of high and low brain activity,
What can images from an PET be used for?
2 points
- Provides info about brain structure, activity, and function.
- Determines which areas of the brain are more closely aligned to certain tasks.
