Spinocerebellar ataxia 13 (SCA13) is a rare sub-type of spinocerebellar ataxias (SCA), a group of neurological diseases that causes degeneration of the brain and spinal cord. The age when symptoms begin and the type and severity of symptoms of SCA13 can be different from person to person even in the same family. The childhood forms is often least progressive, but may also include mild to moderate learning problems, taking longer to learn to crawl, walk, or run (delayed development of motor skills), and seizures. The main symptoms of SCA13 include difficulties coordinating movements (ataxia), especially walking; abnormal eye movements (nystagmus); mild to moderate intellectual disability; and involuntary muscle jerks or twitches (myoclonic jerks). Other symptoms may include speech difficulty (dysarthria), difficulty eating (dysphagia), slowness of movements (bradykinesia), mild bladder problems, stiff and brisk deep tendon reflexes, and loss of the sense of vibration. SCA13 is caused by changess in the KCNC3 gene and it is inherited in an autosomal dominant manner. Since the symptoms of SCA13 can be similar to other types of SCA, genetic testing is used to confirm the diagnosis.