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Living with Spastic ataxia 3

A rare inherited nervous system condition with poor coordination, stiff muscles and brain changes.

Understanding Spastic ataxia 3

Spastic ataxia 3 is a rare genetic condition that causes poor coordination (ataxia) and stiff muscles (spasticity).

It also involves shrinking of the cerebellum (and sometimes the cerebrum), involuntary muscle movements (dystonia) and changes in the brain's white matter. Symptoms can start anywhere from childhood to adulthood.

Signs & symptoms

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

  • Poor coordination when walking
  • Stiff muscles (spasticity)
  • Slurred speech
  • Involuntary eye movements (nystagmus)
  • Dystonia
  • Mild intellectual disability

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 MARS2 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, United Mitochondrial Disease Foundation and MitoAction 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, United Mitochondrial Disease Foundation, MitoAction
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 and other patient organizations
  • 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 MARS2 gene confirm this diagnosis?
Which therapies can help with coordination and spasticity?
How should hearing and the spine be monitored?

Quick facts

Symptoms usually startfrom Childhood to Adulthood
InheritanceAutosomal Recessive, Mitochondrial
GenesMARS2

GARD lists changes in the MARS2 gene. A child inherits a changed copy of the gene from each parent (autosomal recessive).

GeneticNeurologicalInherited MetabolicMitochondrial

Also known as: arsal; arsal - autosomal recessive spastic ataxia with leukoencephalopathy; ataxia, spastic, 3, autosomal recessive; autosomal recessive spastic ataxia caused by mutation in mars2; autosomal recessive spastic ataxia type 3; autosomal recessive spastic ataxia with leukoencephalopathy

Patient organizations

Source: NIH GARD · Spastic ataxia 3GARD ID 17425 · 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 Spastic ataxia 3.

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Explore research for Spastic ataxia 3

Explore actively recruiting Spastic ataxia 3 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Spastic ataxia 3 with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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