A demyelinating disease occurs when the myelin sheath of neurons is damaged, affecting the conduction of signals in the affected nerves. The impaired conduction function causes deficiency in sensation, movement, cognition, or other functions.

The possible causes include genetic characteristics, infectious agents, autoimmune processes, toxic and unknown factors.

Information to be provided

  • Copy of the GP notes for the past 2 years or since the acute illness if more recent;
  • Copy of any discharge summary and any neurologist report;
  • Copy of any investigation report.


  • An applicant with a history of demyelinating disease should be considered as having a condition that is of aeromedical significance.