Spinocerebellar ataxia (SCA) is a progressive, degenerative, genetic diseasewith multiple types .The hereditary ataxias are categorized by mode of inheritance and causative gene or chromosomal locus. The hereditary ataxias can be inherited in an autosomal dominant, autosomal recessive, or X-linked manner.
Spinocerebellar ataxia (SCA) is one of a group of genetic disorders characterized by slowly progressive incoordination of gait and often associated with poor coordination of hands, speech, and eye movements. Frequently, atrophy of the cerebellum occurs, and different ataxias are known to affect different regions within the cerebellum. As with other forms of ataxia, SCA results in unsteady and clumsy motion of the body due to a failure of the fine coordination of muscle movements, along with other symptoms. The symptoms of an ataxia vary with the specific type and with the individual patient. Generally, a person with ataxia retains full mental capacity but may progressively lose physical control