Amyotrophic Lateral Sclerosis (ALS)
ALS is a form of motor neurone disease that affects the nerve cells controlling movement. Understanding the symptoms and arranging appropriate neurological assessment are important, especially when weakness is progressive.
Enquire about a neurological consultationWhat is amyotrophic lateral sclerosis?
Amyotrophic lateral sclerosis (ALS) is the most common type of motor neurone disease (MND). It affects motor neurones in the brain and spinal cord, gradually interfering with the signals that control voluntary muscles.
ALS usually causes progressive weakness. Symptoms, their starting point and the rate of change vary from person to person. The condition is serious, but many more common and sometimes treatable conditions can cause similar early symptoms.
If ALS is suspected, an appropriate specialist assessment is important. The purpose of a consultation is to understand the pattern of symptoms and identify the right next steps, not to assume a diagnosis from one symptom.
Possible symptoms of ALS
Symptoms often begin in one area and become more noticeable over time. Not everyone experiences the same symptoms.
Progressive limb weakness
Increasing difficulty gripping objects, turning keys, climbing stairs or lifting the front of the foot when walking.
Muscle wasting
A visible reduction in muscle bulk or a loss of strength that develops alongside other changes.
Twitching and cramps
Muscle twitching, cramps and stiffness can occur, usually alongside other clinical features rather than as isolated proof of disease.
Speech changes
Speech may become unusually slurred, less clear or more effortful.
Swallowing difficulties
Problems managing food, drink or saliva may develop and need prompt assessment.
Breathing difficulties
In some cases, respiratory muscle weakness can cause breathlessness or difficulty breathing when lying flat.
The presence of any one symptom does not mean a person has ALS. Progressive loss of muscle function is a more significant reason to seek assessment.
What else might cause these symptoms?
Muscle weakness or twitching can arise from a range of conditions, including peripheral nerve disorders, nerve compression, muscle disorders, medication effects and other neurological or medical problems.
For this reason, neurological assessment considers the full history and examines strength, reflexes, muscle bulk and other signs. The pattern of findings helps determine which tests or referrals are appropriate.
You can also read about peripheral nerve and muscle disorders for a broader overview of numbness, weakness and nerve-related symptoms.
Progressive weakness should not be ignored
Contact your GP promptly if you notice weakness that is worsening, repeated unexplained tripping, difficulty using a hand, progressive speech changes or swallowing problems.
If motor neurone disease is suspected, specialist referral should be made without delay. A suspected MND diagnosis is not something to leave on a routine waiting list without clinical triage.
Sudden facial drooping, arm weakness or speech disturbance may indicate a stroke: call 999. Severe breathing difficulty or an inability to swallow safely also needs emergency medical care.
How is ALS assessed and diagnosed?
There is no single test that establishes ALS in every patient. Diagnosis requires specialist clinical assessment and, where appropriate, investigations to help distinguish ALS from other conditions.
Clinical history and examination
A neurologist reviews when symptoms began, how they are progressing and which functions have changed, then assesses strength, reflexes, muscle bulk, movement and speech.
Targeted investigations
Electromyography (EMG) and nerve conduction studies may assess nerve and muscle activity. Blood tests and MRI may help exclude alternative or treatable explanations.
Specialist review and referral
Where ALS or another motor neurone disease is suspected, timely referral to a neurologist with current MND expertise and a specialist multidisciplinary service is essential.
A normal scan does not, by itself, rule ALS in or out. Investigations are interpreted together with symptoms and examination findings.
What happens if ALS is diagnosed?
There is currently no cure for ALS, but specialist treatment and coordinated support can help manage symptoms and quality of life. Care should be tailored to the person's needs and reviewed as the condition changes.
Specialist multidisciplinary care
An MND team may include neurology, specialist nursing, physiotherapy, occupational therapy, dietetics and speech and language therapy.
Medication and symptom management
Riluzole may be offered to people with ALS. Other treatments can help manage cramps, stiffness, saliva problems and associated symptoms.
Communication, nutrition and breathing support
Early assessment of swallowing, communication and respiratory function allows suitable support and equipment to be planned when needed.
Treatment decisions, prognosis and ongoing care should be discussed with an appropriately experienced MND specialist team.
How Dr Yasser Falah can help
Dr Yasser Falah is a Consultant Neurologist in London. For people experiencing unexplained neurological symptoms, a consultation can help clarify the clinical picture, review previous investigations and identify appropriate next steps.
Where findings raise concern about ALS or another motor neurone disease, prompt referral to a neurologist and multidisciplinary service with specific MND expertise is important. This page does not imply that Dr Falah runs a dedicated MND treatment service.
About Dr Yasser FalahInformation that may be useful
- When weakness or other symptoms first appeared
- Which activities have become more difficult
- Whether changes are spreading or progressing
- Any speech, swallowing or breathing symptoms
- Previous scans, nerve tests, medicines and referral letters
You can review consultation fees and clinic locations.
ALS and motor neurone disease FAQs
Is ALS the same as motor neurone disease?
ALS is the most common form of motor neurone disease (MND). MND is a wider term for a group of disorders affecting the motor nerve cells that control voluntary movement.
Does muscle twitching mean I have ALS?
No. Muscle twitching is common and can have many causes. Twitching without progressive weakness or muscle wasting does not, by itself, suggest ALS. Seek medical assessment if you notice persistent or worsening weakness, loss of function or other concerning changes.
What are the early signs of ALS?
Early symptoms may include progressive weakness in a hand, arm, foot or leg, reduced grip, tripping, muscle wasting, or changes in speech or swallowing. These symptoms can also occur in other conditions.
How is ALS diagnosed?
Diagnosis is based on a specialist history and neurological examination. Electromyography (EMG), nerve conduction studies, blood tests and MRI may be used to support assessment and exclude other causes. No single test confirms every case.
Can ALS be treated?
There is currently no cure for ALS. Treatments such as riluzole may be appropriate for some patients, while multidisciplinary care can support movement, breathing, nutrition, communication and quality of life.
Should I book a routine appointment if ALS is suspected?
If a clinician suspects motor neurone disease, NICE recommends referral without delay to a neurologist with relevant expertise. New breathing difficulties or inability to swallow safely require urgent medical assessment rather than waiting for a routine private appointment.
Related neurological information and support
Worried about unexplained or progressive weakness?
A neurological consultation can help establish the right pathway for assessment. Where MND is suspected, urgent specialist referral takes priority over routine booking.
For sudden stroke-like symptoms or severe difficulty breathing, call 999.