fMRI

Cards (4)

  • fMRI (Functional Magnetic Resonance Imaging)
    Measures areas of accumulated oxygenated red blood cells, which are suggestive of activity
    • this activity is aka as the BOLD signal.
  • fMRI procedure
    1. Changes in the BOLD signal are monitored while an individual completes a task (takes 40-55 mins)
    2. Because the brain is always active, passive activity is measured to establish a baseline.
    3. Activity while performing a task is then measured.
    4. Passive Activity is subtracted from Functional Activity to produce a 3D activation map
  • BOLD signal

    Activity measured by fMRI
  • fMRI

    • Produces activation maps: 3D images that show which brain regions become activated during specific tasks
    • Better temporal and spatial resolution than PET scans