brain and spinal chord problems

• CT scans use x-rays to investigate structure of the brain by producing images.
• PET scans use radioactive chemicals to highlight activity in the brain.
• MRI scans use magnetic fields and electromagnetic waves to investigate activity and structure.
• MRI scans don’t use ionising radiation so they are safer than CT scans.
• High risks of damage when repairing as the tissues are intricate and delicate.
• CT scans can show damaged structures in the brain.

  PET scans show unusual activity in the brain.
• Spinal cord damage can not be fully repaired as neurones are not capable of mitosis once they have differentiated during the development of an organism and therefore, new ones can’t be made from existing neurones.