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Disease Atlas / Disease detail

Amyotrophic lateral sclerosis

An evidence-bounded atlas of motor-neuron injury, clinical variability, diagnosis, multidisciplinary care, and gene-targeted research.

amyotrophic lateral sclerosis · ALS · motor neuron disease · Lou Gehrig disease

MONDO:0004976Public QA completeSource-bound · 4

Disease at a glance

Start with the essentials, then explore the patient and research views.

Public revision · 2b421f713861

Disease class
ALS is a neurodegenerative disease involving progressive injury to upper and lower motor neurons in the brain and spinal cord.
Core mechanism
Motor-neuron loss can lead to weakness, muscle wasting, and loss of motor function.
Genes or cause
Most ALS occurs without an identified family history, while a subset has an identifiable genetic cause.
Typical features
Initial symptoms can vary, beginning with limb weakness, speech or swallowing changes, or respiratory difficulty.
Variability
Progression rate, regions involved, and cognitive or behavioral changes vary substantially among individuals.
Diagnosis
No single test establishes ALS; diagnosis integrates clinical examination, electromyography and nerve-conduction studies, and exclusion of mimics.
Management
Genetic counseling and testing can be discussed in light of family history, age at onset, and individual preferences.
Treatment and research
Multidisciplinary care coordinates respiratory, nutritional, communication, mobility, and symptom support.
Reading evidence
Riluzole and edaravone are used to modify disease course in selected patients but do not cure ALS.
Key caution
Noninvasive ventilation, cough assistance, and nutritional support can support function and quality of life when clinically indicated.

For patients and families

A structured guide for understanding the disease and preparing for clinical conversations.

At a glance

ALS is a neurodegenerative disease involving progressive injury to upper and lower motor neurons in the brain and spinal cord.

Initial symptoms can vary, beginning with limb weakness, speech or swallowing changes, or respiratory difficulty.

How the disease works

Motor-neuron loss can lead to weakness, muscle wasting, and loss of motor function.

Most ALS occurs without an identified family history, while a subset has an identifiable genetic cause.

Why experiences vary

Progression rate, regions involved, and cognitive or behavioral changes vary substantially among individuals.

Diagnosis and management

No single test establishes ALS; diagnosis integrates clinical examination, electromyography and nerve-conduction studies, and exclusion of mimics.

Treatment status

Genetic counseling and testing can be discussed in light of family history, age at onset, and individual preferences.

Multidisciplinary care coordinates respiratory, nutritional, communication, mobility, and symptom support.

Reading clinical trials

Repeated assessment of respiratory function, weight and swallowing, communication, and mobility guides the timing of support.

Topics for a clinical visit

Clinical discussion should separately address functional change, respiratory and nutritional support, genetic-test implications, and treatment or trial eligibility.

Medical notice

This material is for disease education and is not a personal diagnosis or treatment instruction.

Evidence and sources

A trial registry status does not establish efficacy or regulatory approval.