Demyelination Symptoms

By Dr Ananya Mandal, MD

Myelin is a substance that forms an insulating sheath around the axons of nerve cells in the central and peripheral nervous systems. Myelin is mainly made up of lipids and in the central nervous system is formed from the oligodendrocytes, a form of neuroglia that serve to protect and insulate axons. In the peripheral nerve system, myelin is formed from Schwann cells.

Any disorder that leads to the destruction of this myelin covering is referred to as demyelinating disease. Damage to the myelin sheath disrupts nerve signal conduction, resulting in neurological symptoms such as reductions in sensation, cognitive ability and movement as well as decreases in any other functions that depend on nerve signalling.

The mechanisms underlying demyelination are not clearly understood but contributory factors thought to be involved include:

  • Genetic predisposition
  • Certain infections
  • Some autoimmune disorders
  • Exposure to toxic chemicals

Symptoms of demyelinating disease

The symptoms of demyelination depend on the type of demyelinating disease a person has and whether the central nervous system or peripheral nervous system is affected. Examples of some of the symptoms that may manifest in demyelinating diseases include:

  • Impaired vision, ocular paralysis
  • Speech problems
  • Muscle movement disorder such as ataxia and unsteady gait
  • Parasthesia or a burning, tickling, or prickling feeling in the skin
  • Hemiparesis or muscle weakness in one side of the body
  • Incontinence
  • Hearing problems
  • Fatigue
  • Clumsiness

Reviewed by , BSc

Further Reading

Last Updated: Jan 22, 2014

Read in | English | Español | Français | Deutsch | Português | Italiano | 日本語 | 한국어 | 简体中文 | 繁體中文 | Nederlands | Русский | Svenska | Polski
Comments
The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News-Medical.Net.
Post a new comment
Post
You might also like... ×
New subcellular mechanism identified for fast transmission in basket cells of the brain