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    Home»Neurology»PLS vs ALS: Differences, Symptoms, Causes, Treatment
    Neurology

    PLS vs ALS: Differences, Symptoms, Causes, Treatment

    brainwealthy_vws1exBy brainwealthy_vws1exJanuary 3, 2023No Comments6 Mins Read
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    Primary lateral sclerosis (PLS) and amyotrophic lateral sclerosis (ALS) are rare neurodegenerative diseases that progressively affect voluntary muscle movement over time. However, there is an important difference between the two conditions.

    PLS affects only upper motor neurons, develops more slowly, is debilitating, but not fatal. ALS affects both upper and lower motor neurons, occurs more rapidly, causes muscle wasting, and has more devastating effects than PLS.

    This article details the differences, symptoms, diagnosis, and treatment of PLS ​​and ALS.

    FatCamera/Getty Images


    symptoms

    Many symptoms of PLS ​​and ALS are very similar and can be confused with other symptoms early in the disease process. This is because both diseases lead to degeneration and death of the neurons that carry information to and from the brain.

    Symptoms of PLS

    PLS symptoms take years to develop, while ALS symptoms appear more rapidly. Additionally, those diagnosed with PLS typically continue to live a normal lifespan, while those diagnosed with ALS typically have a life expectancy of 3 to 5 years.

    PLS is more common in men than women and typically begins between the ages of 40 and 60. PLS progresses gradually over years to decades.

    Common symptoms of PLS ​​are:

    • weakness of the legs
    • muscle spasms and spasticity
    • Difficult to walk
    • problem of balance
    • clumsiness
    • slowing down of movement
    • speech or swallowing problems
    • Stiffness and weakness starting in the legs and slowly spreading to the torso

    Symptoms of ALS

    Symptoms of ALS usually do not develop until after age 50. However, symptoms may start early. ALS patients experience loss of coordination and muscle strength that gets progressively worse, eventually affecting more muscle groups.

    ALS symptoms eventually reach the point where daily functions such as swallowing, walking and standing become impossible.

    Other common symptoms of ALS include:

    • weakness in the arms and legs
    • Decreased ability to swallow, choking, nausea, and drooling
    • difficulty breathing
    • Difficulty walking or climbing stairs
    • difficult to lift
    • Speech problems, such as slurred or slow speech
    • Head drop due to weakened neck muscles
    • hoarseness of voice
    • muscle spasms or stiffness
    • weight loss

    ALS patients retain cognition. However, in rare cases, people can develop dementia, leading to memory loss.

    cause

    In most cases, the exact cause of PLS ​​and ALS is unknown and appears to occur randomly.

    Causes of PLS

    PLS is a genetic disease, caused by a dysfunctional gene known as the genetic variant SPG7. Some people inherit PLS from their parents.

    Causes of ALS

    Research suggests that genetics and environment play a role in the development of ALS. Over 10 genetic mutations, including the SOD1 gene, have been associated with some cases of ALS.

    Environmental factors that may contribute to the development of ALS include:

    • Exposure to toxins or other infectious agents
    • virus
    • physical trauma
    • malnutrition

    diagnose

    Several diagnostic tests help diagnose ALS and PLS. In either case, no single test can provide a definitive diagnosis. Your health care provider will likely begin by gathering your past medical history, performing a physical examination, and gathering information about your symptoms. It may also run additional diagnostic tests not included in the

    Diagnostic tests for PLS and ALS may include:

    • clinical examination
    • neurological examination
    • blood and urine tests
    • Electromyography (EMG)
    • Nerve conduction studies (NCS)
    • Lumbar puncture
    • Magnetic resonance imaging (MRI) of the brain and spine
    • muscle biopsy
    • genetic test
    • swallowing studies
    • Repeat neurologic and diagnostic tests to assess whether symptoms are worsening

    Symptoms of ALS begin and worsen much earlier than PLS, so it is easier to diagnose within the first year or two.

    process

    Proper diagnosis of PLS ​​or ASL is essential, as treatment varies by disease. Unfortunately, there is no treatment that reverses or cures motor neuron damage caused by PLS or ALS. Treatment can help control symptoms, prevent complications, and improve quality of life for people with either disorder.

    PLS treatment

    Treatment of PLS ​​is usually symptomatic and includes:

    • Muscle relaxants to reduce spasticity, including Lioresal (baclofen), Zanaflex (tizanidine), or benzodiazepines
    • Analgesics
    • antidepressants for depression
    • physical therapy
    • Occupational therapy and rehabilitation to prevent joint immobility and delayed muscle atrophy
    • Assistive devices such as supports and braces
    • speech synthesizer
    • wheelchair if needed
    • Speech therapy if facial muscles are involved

    ALS treatment

    Because the onset of symptoms progresses more rapidly and is more debilitating, additional supportive care from a variety of providers is essential, including:

    • doctor
    • pharmacist
    • neurologist
    • Physical therapist, occupational therapist, speech therapist, respiratory therapist
    • nutritionist
    • social worker
    • clinical psychologist, and
    • home care and hospice nurses.

    A multidisciplinary team approach helps deliver individualized treatment plans to keep patients as mobile, comfortable and independent as possible.

    Medications that help manage the symptoms of ALS include:

    • Rirutec (riluzole)): an oral drug thought to reduce damage to motor neurons. Studies show that the drug may help patients live a few months longer.
    • Radicava (edaravone): Intravenous drug thought to help slow decline in daily activities

    Your health care provider may also prescribe drugs to help:

    • muscle spasms
    • muscle stiffness
    • excess saliva
    • pain management
    • dimple
    • sleep problems
    • constipation

    Additional devices that can help people with ALS include:

    • computer-based speech synthesizer Uses eye-tracking technology to help people with yes or no answers
    • Brain Computer Interface (BCI) A system that allows ALS patients to communicate or control devices such as wheelchairs using only brain activity

    As ALS progresses, the muscles that help you breathe weaken and you may need additional respiratory support, including:

    • Non-Invasive Ventilation (NIV): Oxygen is supplied through a mask over the nose and mouth.
    • Respirator (ventilator): A machine inflates and deflates the patient’s lungs.

    .

    prevention

    Unfortunately, there is no clear way to prevent PLS or ALS. However, if you have a family history of motor neuron disease, consider talking to a genetic counselor.

    overview

    Primary lateral sclerosis (PLS) and amyotrophic lateral sclerosis (ALS) are two rare neurodegenerative diseases that progressively affect voluntary muscle movement over time. Although the diseases are similar, they have different symptoms and require different treatments.

    PLS symptoms take years to develop, while ALS symptoms appear more rapidly. Additionally, those diagnosed with PLS typically maintain a normal lifespan, while those diagnosed with ALS typically have a life expectancy of 3-5 years her.

    A word from Verywell

    If you or a loved one has been diagnosed with PLS or ALS, talk to your healthcare provider about your diagnosis and treatment plan. Regular visits to a health care provider are essential to see if symptoms worsen over time and to make a correct diagnosis. Neuromotor disorders are difficult illnesses to live with, but know that there are many treatments and medical professionals that can help you manage your symptoms.

    Sarah Zibiden, RN

    Sarah Jividen, RN, BSN is a freelance healthcare journalist and content marketing writer at Health Writing Solutions LLC. She has over 10 years of first-hand patient care experience as a registered nurse specializing in neurotrauma, stroke, and emergency rooms.

    Thank you for your feedback!

    what is your feedback?






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