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Living with Spinocerebellar ataxia type 2

An inherited condition causing slowly worsening problems with movement, balance, speech and eye movements, and sometimes memory and thinking.

Understanding Spinocerebellar ataxia type 2

Spinocerebellar ataxia type 2 (SCA2) is an inherited condition with progressive problems with movement.

People first have trouble with coordination and balance (ataxia). Other early signs include speech and swallowing difficulty and weak eye muscles, with slow and involuntary eye movements. Over time, people may develop nerve damage, muscle wasting, twisting postures, jerky movements and parkinsonism. Some have memory and planning problems or dementia. Symptoms usually begin in mid-adulthood but can appear anytime from childhood to late adulthood.

Signs & symptoms

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

  • Poor balance and coordination (ataxia)
  • Slurred speech (dysarthria)
  • Slow, jerky eye movements
  • Tremor and muscle twitches
  • Twisting postures and jerky movements
  • Memory and thinking decline

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, eye disease specialists and genetic specialists.

  3. Consider genetic testing

    Changes in ATXN2 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); Eye disease specialists (ophthalmologists); 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 ATXN2 gene confirm this diagnosis?
What therapies can help with balance, speech and swallowing?
Should family members consider genetic counseling?

Quick facts

Symptoms usually startany time in life
InheritanceAutosomal Dominant
GenesATXN2

GARD lists changes in the ATXN2 gene. It is inherited in an autosomal dominant pattern, meaning one changed copy of the gene is enough.

GeneticNeurological

Also known as: atxn2 autosomal dominant cerebellar ataxia type i; autosomal dominant cerebellar ataxia type i caused by mutation in atxn2; cerebellar degeneration with slow eye movements; olivopontocerebellar atrophy ii; opca2; sca2

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Spinocerebellar ataxia type 2GARD ID 4072 · 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 2.

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