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Living with Juvenile amyotrophic lateral sclerosis

A rare nerve disease starting in childhood that gradually affects the nerve cells that control muscles, causing stiffness, weakness, and speech and walking problems.

Understanding Juvenile amyotrophic lateral sclerosis

Juvenile amyotrophic lateral sclerosis (JALS) is a rare motor neuron disease in which nerve cells that control voluntary muscles slowly break down.

It starts in childhood. Symptoms include facial stiffness, slurred speech (dysarthria), and a stiff walk. Some people have uncontrolled laughing or crying, mild wasting of the legs and hands, bladder problems, or sensory changes. It is usually slowly progressive, though the speed varies.

Signs & symptoms

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

  • Stiff, awkward walking (spastic gait)
  • Slurred or difficult speech (dysarthria)
  • Muscle weakness
  • Muscle wasting in the hands or legs
  • Muscle stiffness (spasticity)
  • Muscle spasms or abnormal postures (dystonia)

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. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    ALS Association 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: ALS Association
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 ALS Association
  • 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
Which gene is behind my child's JALS, and can genetic testing find it?
Which therapies can help with walking, speech, and muscle stiffness?
Which specialists should follow my child over time?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Recessive

Several subtypes are linked to changes in genes such as ALS2, SIGMAR1, SPG11, and SETX, and sometimes UBQLN2, FUS, and TARDBP. Inheritance can be autosomal recessive or autosomal dominant depending on the gene, and changes can be inherited or happen for the first time in the person.

GeneticNeurological

Also known as: jals; jals - juvenile amyotrophic lateral sclerosis; juvenile charcot disease; juvenile lou gehrig disease

Patient organizations

Source: NIH GARD · Juvenile amyotrophic lateral sclerosisGARD ID 11901 · 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 Juvenile amyotrophic lateral sclerosis.

Explore the Juvenile amyotrophic lateral sclerosis blog

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Explore actively recruiting Juvenile amyotrophic lateral sclerosis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Juvenile amyotrophic lateral sclerosis 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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