ALS (Amyotrophic Lateral Sclerosis) – What Is It? What Are the Symptoms?

Amyotrophic lateral sclerosis (ALS) is a neuromuscular disease that causes muscle weakness. This disease affects motor neurons and reduces muscle strength and the ability to move. ALS symptoms include difficulty speaking, swallowing and moving. However, each patient may experience different symptoms, and the progression of the disease may vary. ALS is a progressive condition that can lead to complications such as respiratory failure. Although there is currently no definitive cure, supportive treatments exist to relieve symptoms and improve quality of life. In ALS treatment, doctors may use therapies and medication to manage symptoms and slow the progression of the disease.

What Is ALS?

ALS is a type of motor neuron disease. ALS affects motor neurons, the nerves that control voluntary muscles. Voluntary muscles include those involved in actions such as chewing, speaking, and moving the arms. ALS is progressive, meaning symptoms worsen over time. In ALS, the muscles begin to waste away or shrink. Over time, muscles weaken, making it difficult to walk, speak, swallow and eventually breathe. There are two main types of these nerve cells. Upper motor neurons are found in the brain. They send signals from the spinal cord to lower motor neurons, allowing muscles to move. In ALS, the brain can no longer send messages to the muscles. When muscles do not receive any signal, they weaken and waste away. This is called atrophy. ALS has two types:

Sporadic ALS is the most common form. It affects 95% of people who have the disease. Familial ALS (FALS) occurs in families. Approximately 5% to 10% of people with ALS have this type. FALS is caused by changes in a gene. If one parent has the ALS gene, each of their children may have an increased chance of inheriting the gene and developing the disease. Although ALS has no definitive cure, treatments are constantly being developed. The right combination of treatments can slow the progression of the disease and help people with ALS have a good quality of life.

What Are the Symptoms of ALS?

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease in which nerve cells gradually deteriorate and people lose control of their muscles. ALS affects everyone differently, but it causes a gradual loss of control over voluntary muscles, including those used for walking, speaking, moving, eating, drinking and breathing. Early signs of ALS may include:

Muscle cramps, especially in the hands and feet

Muscle twitching in the arm, leg or tongue

Muscle stiffness or tightness

Weakness in the hands, arms, legs, or on only one side of the body

Difficulty speaking loudly

Speech impairment

Chewing or swallowing problems

Some of the symptoms seen in later stages may include:

Tripping and falling more often

Frequently dropping things

Weight loss

Drooling when taking fluids or risk of choking

Feeling tired all the time

Difficulty controlling facial expressions

Laughing or crying involuntarily

As ALS progresses, it affects more areas of the body. Over time, people may lose control of their muscles and be unable to do the following on their own:

Moving the arms and legs

Standing or walking

Getting in and out of bed

Chewing or swallowing

Speaking

Forming words

Breathing without machine assistance

How Does ALS Occur?

Amyotrophic lateral sclerosis (ALS) is a complex disease whose exact cause is not fully understood. Gene changes or mutations account for between 5% and 10% of cases. Possible causes of ALS include:

Genetic factors: A family history of ALS or similar neurodegenerative diseases may increase the genetic predisposition to the disease. Different gene mutations can accelerate damage to nerve cells, triggering the development of ALS.

Mitochondrial problems: Mitochondria are the parts of cells where energy is produced. A problem with them may lead to ALS or further worsen an existing condition.

Environmental factors: Exposure to toxic substances such as heavy metals (e.g., lead, mercury), pesticides, and solvents may increase the risk of ALS. Chemical exposures, such as environmental factors, are thought to play a role in the development of ALS.

Immune system problems: The immune system protects the body against foreign invaders such as bacteria and viruses. Microglia are the main type of immune cell in your brain. They destroy germs and damaged cells. In ALS, microglia may destroy healthy motor neurons as well.

Inflammation and oxidative stress: Processes such as inflammation and oxidative stress can lead to damage and death of nerve cells, affecting the progression of ALS.

Lifestyle factors: Harmful lifestyle factors such as smoking, alcohol consumption, and high caffeine intake may increase the risk of ALS. In addition, factors such as low physical activity levels or an unbalanced diet may also affect the risk of the disease.

How Is ALS Diagnosed?

There is no single test used to diagnose ALS. To diagnose ALS, the doctor first takes the patient's medical history. Then they perform a physical examination to assess the symptoms. A neurological examination may also be performed to check how well the muscles and nerves work together. These tests measure the patient's reflexes and can be useful for examining muscle problems such as weakness or spasticity. In addition to the physical examination, the doctor may order the following tests to aid diagnosis. Some tests used to diagnose ALS may include:

Electromyogram (EMG): In ALS, muscle fibers may not function properly. The doctor inserts a needle into the muscle through the skin to measure electrical activity. EMG can be used to measure the electrical activity of muscles.

Nerve conduction tests: Nerve conduction tests evaluate the ability of nerves to conduct electrical signals.

Magnetic resonance imaging (MRI): The doctor may examine detailed images of the brain and spinal cord to check for tumors or other conditions that may cause symptoms.

Blood tests: Blood tests may be performed to support the diagnosis of ALS or to rule out other potential causes. These tests aim to check for infections, vitamin deficiencies, and other metabolic disorders.

Spinal fluid collection: This test method is also called lumbar puncture. The doctor takes a sample of spinal fluid with the help of a syringe to try to diagnose possible brain and spinal cord problems.

Muscle biopsy: A small piece of muscle taken by the doctor may be examined under a microscope to detect possible muscle problems.

How Is ALS Treated?

In ALS treatment, doctors aim to slow the progression of the disease and control symptoms. The right treatment plan can help the patient remain comfortable and independent for as long as possible. Some ALS treatment methods may include:

Drug therapy: Medication may be used to slow the progression of ALS or relieve symptoms. Drugs to relieve muscle cramps, excess saliva and other symptoms may be preferred.

Physical therapy and rehabilitation: Physical therapy programs may be used by a specialist physician to relieve discomfort caused by stiff muscles, cramps and fluid retention. Exercise programs, posture correction, use of mobility aids and other rehabilitation methods can help patients maintain daily life activities.

Respiratory support: As ALS progresses, difficulty breathing may occur due to weakening of the respiratory muscles. In this case, breathing devices or ventilators may be used to support breathing.

Nutritional support: Patients with ALS may experience difficulty swallowing over time and may be unable to get adequate nutrition. In this case, a diet program arranged by nutrition specialists or nutritional support may be provided.

Speech and communication aids: Speech therapists can help ALS patients manage speech and swallowing problems. In addition, technological tools such as communication devices can help them maintain communication.

Psychosocial support: The emotional and psychological effects of ALS are very important. Patients and their families may benefit from psychosocial support services such as support groups, psychotherapy or counseling.

Frequently Asked Questions

ALS is a neurodegenerative disease that generally follows a progressive course, in which nerve cells deteriorate over time. Initial symptoms usually manifest as impairment of motor functions such as muscle weakness, muscle cramps, and difficulty speaking. ALS is a very serious and dangerous condition, because due to the destruction of nerve cells, a person loses muscle control, and ultimately, mobility and respiratory functions are severely affected. As the disease progresses, life-threatening complications such as respiratory failure may occur, and it can often be fatal. ALS can rarely occur at a young age. Generally, most people diagnosed with ALS are between 40 and 70 years old, although some cases may be diagnosed at younger ages. The progression of ALS varies greatly from person to person and is a difficult process to predict. In some patients, symptoms progress slowly, while in others a faster course may be observed. There is currently no definitive treatment that will stop ALS. Researchers are still trying to fully understand the cause and development of the disease. Treatments generally focus on managing symptoms and aim to improve quality of life. 5-10% of ALS cases are hereditary, meaning they run in families. However, the disease is not entirely dependent on genetic factors. Environmental factors and immune system disorders may also play a role in the development of ALS. ALS is a serious progressive disease that can cause extreme difficulties in daily life. Treatment aims to control symptoms. People with symptoms of ALS can start treatment by making an appointment at the neurology outpatient clinics of hospitals.