Definition. Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease even though the matching gene from the other parent is normal.The abnormal gene dominates.efinition. Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease even though the matching gene from the other parent is normal.
Savant syndrome is a rare syndrome in which people with poor mental development or brain injury possess extraordinary mental skills which are difficult to explain scientifically. Sometimes the talents of a savant may go unnoticed.he exact cause of a savant syndrome is not known. A lot of hypotheses have been proposed. Some researchers believe that there is damage to the left hemisphere of brain, which results in compensatory changes in the right side of brain.
Infectious causes of cerebellar ataxia syndrome may include: Chickenpox. Coxsackie disease (viral infection also called hand-foot-and-mouth disease). Creutzfeldt Jakob disease (rare disease believed to be an infection that causes mental deterioration). Encephalitis or brain abscess (brain inflammation or infection).ther causes of cerebellar ataxia syndrome. Other causes of cerebellar ataxia syndrome may include: Brain tumors. Stroke and other vascular conditions.