Subject: Brain Bee

imaging technic

  • 11 months ago
    rachel
    EEG (Electroencephalogram) • Measures subtle changes in brain electrical activity through electrodes placed on the head • Localisation of functions in the brain • Allows getting an electrical picture of brain activity during various cognitive states or tasks CAT scans (Computerised axial tomography scans) • Generates cross-sectional images of the brain using a series of X-ray pictures taken from different angles MRI (Magnetic Resonance Imaging) • Uses extremely powerful electromagnets and radio waves to get 3-D structural information from the brain ² The above 3 techniques only capture 'snapshots' of the brain (do not allow viewing the brain the brain as it is working); the following 2 allows viewing the brain as it is working. fMRI (Functional MRI) • Rapid sequencing of MRI images PET scans (Positron Emission Tomography) • Provide images via diffusion of radioactive glucose in the brain • The more glucose being used in a given brain area, the more that area is in active use