Neuroimaging techniques Flashcards
What is a CT?
Computerised Tomography.
Produces a 2D cross section of the brain image using X rays.
Involves the injection of substances which highlight the brain’s blood vessels.
What are CT scans used for?
Used for identifying the location and extent of damage or abnormalities.
Shows brain structure not activity
What is an MRI?
Magnetic Resonance Imaging
Uses harmless magnetic fields and radio waves to vibrate brain’s atoms and produce an image of brain structure
What are MRI scans used for?
Used for diagnosing structural abnormalities but can also detect small changes in the brain
What is an ESB scan?
Electrical Stimulation of the Brain.
Electrical activity can either be stimulated or detected using an electrode inserted into or placed into a specific area of the brain.
A precise electric current is delivered stimulating that area of the brain which may stimulate or block a response
What is an EEG?
Electroencephalograph
Uses electrodes attached to the scalp to record and analyse brain wave activity of different behaviours and responses.
(line movements on a page)
What is an EEG used for?
Used for diagnosing brain damage and nervous system related disorders (like epilepsy, Parkinson’s disease, depression)
What is a PET scan?
Positron Emission Tomography.
Shows images of the function and activity of different parts of the brain while the patient is doing a cognitive or behavioural activity.
Harmless radioactive substances get injected into the bloodstream to provide images of the brain at work showing blood flow.
What is an fMRI?
Functional Magnetic Resonance Imaging.
Like a normal MRI but measures brain function.
Detects changes in blood oxygen levels to identify areas that are active during a given task.
What is an fMRI used for?
Used in the study of hemispheric specialisation with intact brains
