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Living with Spinocerebellar ataxia type 31

An inherited condition with late-onset balance, speech and eye movement problems.

Understanding Spinocerebellar ataxia type 31

Spinocerebellar ataxia type 31 (SCA31) is a dominantly inherited cerebellar ataxia that usually starts late in life.

It is marked by poor coordination (ataxia), slurred speech and jerky eye movements when looking sideways. Some people also have stiffness signs, tremor, reduced vibration sense and hearing difficulty. Onset happens at a variety of ages.

Signs & symptoms

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

  • Poor coordination when walking
  • Slurred speech (dysarthria)
  • Jerky eye movements (nystagmus)
  • Shrinking of the cerebellum
  • Reduced reflexes
  • Hearing trouble (less common)

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 BEAN1 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 BEAN1 gene confirm this diagnosis?
Should hearing be tested regularly?
What therapies can help with balance and speech?

Quick facts

Symptoms usually starta variety of ages
InheritanceAutosomal Dominant
GenesBEAN1

GARD lists changes in the BEAN1 gene. It is inherited in an autosomal dominant pattern, meaning one changed copy of the gene is enough.

GeneticNeurological

Also known as: sca31

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Spinocerebellar ataxia type 31GARD ID 9975 · 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 31.

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