Home > Encyclopedia of Neurological Disorders > Moebius Syndrome

Definition

Moebius syndrome is a condition in which the facial nerve is underdeveloped, causing paralysis or weakness of the muscles of the face. Other nerves to the facial structures may also be underdeveloped.

Description

Moebius syndrome has been called "life without a smile" because the paralysis of the facial muscles, the most constant feature, leads to the physical inability to form a smile even when happy feelings are experienced.

Individuals with Moebius syndrome may also have abnormalities of their limbs, chest muscles, and tongue. The chance of mental retardation appears to be increased in people with Moebius syndrome, but most people with the disorder have normal intelligence.

Demographics

Moebius syndrome is extremely rare and does not seem to affect any particular ethnic group more than...