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Living with Spinocerebellar ataxia type 29

An inherited condition starting in infancy with very slowly worsening or steady coordination problems, speech trouble and learning challenges.

Understanding Spinocerebellar ataxia type 29

Spinocerebellar ataxia type 29 (SCA29) is a dominantly inherited cerebellar ataxia that starts in infancy.

Poor coordination (ataxia) is very slowly progressive or does not progress at all. People also have slurred speech, abnormal eye movements and intellectual disability. Development of motor skills, speech and social skills may be delayed. Low muscle tone is common.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Poor coordination (ataxia)
  • Delayed motor skills
  • Delayed speech and language
  • Intellectual disability
  • Jerky eye movements (nystagmus)
  • Low muscle tone (hypotonia)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in ITPR1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    National Ataxia Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Expert lists: National Ataxia Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with National Ataxia Foundation
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Can genetic testing of the ITPR1 gene confirm this diagnosis?
What therapies can help with motor and speech skills?
Should eye movements be checked regularly?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant
GenesITPR1

GARD lists changes in the ITPR1 gene. It is inherited in an autosomal dominant pattern, meaning one changed copy of the gene is enough.

GeneticNeurological

Also known as: cerebellar ataxia, congenital nonprogressive, autosomal dominant; congenital nonprogressive spinocerebellar ataxia; sca29; spinocerebellar ataxia 29, congenital nonprogressive

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Spinocerebellar ataxia type 29GARD ID 10480 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Spinocerebellar ataxia type 29.

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