gadolinium:  An element used to provide image contrast during MRI scanning, typically held by a carrier, or chelate molecule, called DTPA.

 

ganglion:  A group of nerve cell bodies.

 

gastrointestinal tract:  Referring to the throat, esophagus, stomach, and intestines.

 

general anesthesia:  A type of sleep induced during surgery in which the patient is not awake and does not experience pain, typically involving intubation and control of respiration by the anesthesiologist.

 

general risks:  Risks common to many type of surgery.

 

gray matter:  The areas of the brain or spinal cord that have neural connections and nerve cells within them.