Amyotrophic Lateral Sclerosis (ALS): Complete 2026 Medical Guide

Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disorder that damages motor neurons in the brain and spinal cord. These neurons control voluntary muscle movements such as walking, speaking, swallowing, and breathing.

As motor neurons degenerate, muscles gradually weaken and waste away. Over time, patients may lose the ability to move, communicate, eat, and breathe independently. ALS is also known as Lou Gehrig’s disease.

Symptoms of Amyotrophic Lateral Sclerosis (ALS)

Early Symptoms of ALS

ALS often begins subtly. Early symptoms may vary depending on which motor neurons are first affected.

• Muscle twitching (fasciculations)
• Muscle cramps and stiffness
• Weak grip or dropping objects
• Slurred speech
• Difficulty swallowing
• Frequent tripping or imbalance

Advanced Symptoms of ALS

• Severe muscle weakness and atrophy
• Loss of ability to walk
• Breathing difficulties
• Difficulty speaking clearly
• Complete paralysis in late stages

ALS primarily affects voluntary muscles but does not usually impact vision, hearing, or bladder control.

Causes and Risk Factors of ALS

The exact cause of ALS is not fully understood. Research suggests a combination of genetic mutations and environmental triggers.

Genetic Causes (Familial ALS)

Around 5–10% of ALS cases are inherited. Mutations in genes such as SOD1, C9orf72, and TARDBP increase the risk of developing ALS.

Environmental Factors

• Exposure to heavy metals
• Industrial toxins
• Smoking
• Head trauma
• Military service exposure

Common Risk Factors

• Age between 40 and 70 years
• Male gender (slightly higher risk)
• Family history of ALS

How is ALS Diagnosed?

There is no single test for ALS. Diagnosis involves a detailed neurological examination and multiple diagnostic tests.

Diagnostic Procedures

• Neurological Examination: Checks muscle strength and reflexes.
• Electromyography (EMG): Measures electrical activity in muscles.
• Nerve Conduction Studies (NCS): Evaluates nerve signals.
• MRI Scan: Rules out stroke or tumors.
• Blood Tests: Excludes other disorders.

Early consultation with a neurologist is crucial for accurate diagnosis.

Treatment Options for ALS

Although ALS has no cure, treatments focus on slowing disease progression and improving quality of life.

Medications for ALS

• Riluzole: Slows progression by reducing glutamate toxicity.
• Edaravone: Reduces oxidative stress in nerve cells.

Supportive Therapies

• Physical therapy to maintain mobility
• Occupational therapy for daily tasks
• Speech therapy for communication
• Respiratory therapy for breathing support

Surgical Interventions

• Feeding tube (Gastrostomy)
• Tracheostomy for breathing assistance