If nerve tracts become damaged during an operation, there is a risk that distant functional areas connected to the tumor-afflicted part of the brain could be affected and induce lasting sensory, motor, and cognitive impairment.
This procedure allows safety margins around nerve tracts in the brain to be more accurately determined.
The effect of this destruction is to slow the electrical impulses that pass along the nerve tracts
This may damage the cells within the spinal cord or sever the nerve tracts
that relay signals up and down the cord.
Some investigators suggested that molecules that inhibit nerve growth are present throughout the CNS and are associated with the myelin along nerve tracts.
In "Progress on the Cure" (December 1998), I discussed a study showing that growth of axons is possible along normal nerve tracts of the adult CNS, in regions where direct damage to nerve cells (and the subsequent formation of a glial scar) had not occurred.
In many MS patients the nerve tracts
in the spinal cord become demyelinated and present clinical signs similar to those of people with traumatic spinal-cord injury.