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Genetic and Rare Diseases Information Center (GARD)

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Spinocerebellar ataxia 15

Other Names for this Disease
  • SCA15
  • SCA16 (formerly)
  • Spinocerebellar ataxia 16 (formerly)
  • Spinocerebellar ataxia type 15
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What are the symptoms of spinocerebellar ataxia 15?

Spinocerebellar ataxia 15 (SCA15) is characterized by slowly progressive gait and limb ataxia, often in combination with ataxic dysarthria, titubation, upper limb postural tremor (which occurs when a person tries to maintain a position against gravity, such as holding the arms outstretched), mild hyperreflexia (exaggerated reflexes), gaze-evoked nystagmus, and impaired vestibulo-ocular reflex gain (an inability to stabilize the eyes during small head tremors, which makes it difficult to read, etc.). Mild dysphagia and movement-induced oscillopsia (a bouncing and blurring of vision) have been observed in some patients. Symptoms typically present between the ages of 7 and 66 years. Gait ataxia and tremor are often the first noticeable symptoms. The ability to walk independently may be maintained for many years (or even decades) following onset of symptoms.[1]
Last updated: 1/22/2013

  1. Storey E. Spinocerebellar Ataxia Type 15. GeneReviews. April 2011; Accessed 1/22/2013.