Wednesday, December 1, 2010

Brain Imaging

Recent technology has allowed neuroscientists to see inside a living brain.  These techniques have allowed them to:

  • understand the function each area in the brain serves
  • locate areas that are affected by brain injuries
Computed Tomography Scan (CT Scan)
-uses x-ray beams to pass through the head.  
-shows structure of the brain, but not function.



Position Emission Tomography (PET)
-detects radioactive material that is injected or inhaled to produce an image of the brain
-radioactive material moves to area of the brain that is in use
-allows you to see function


Magnetic Resonance Imaging (MRI)
-detects radio frequency signals produced by displacing radio waves in a magnetic field
-shows structures of brain



Functional Magnetic Resonance Imaging (fMRI)
-detects changes in blood flow to the brain

-shows structure and function of the parts of the brain