Victor Forge
Multiple sclerosis (MS) is a disease that affects the central nervous system, peripheral nervous system, and voluntary muscle movement. While it is uncommon for MS to cause severe muscle atrophy, it has been observed in a small percentage of patients with the disease. Muscle atrophy, or the wasting and thinning of muscle mass, can be caused by various factors, including disuse of muscles, neurogenic conditions, malnutrition, age, genetics, and lack of physical activity. In the context of MS, muscle atrophy may develop as a result of nerve problems or the disease's impact on voluntary muscle movement. The occurrence of muscle atrophy in the lumbar region specifically warrants further investigation to understand the underlying causes and potential treatments.
| Characteristics | Values |
|---|---|
| Muscle atrophy associated with MS | Occurs infrequently, reported in up to 6% of those with typical MS |
| Treatment | Aerobic training |
| Symptoms | Dysphagia, gait instability, and limb atrophy |
| Symptoms of neurogenic atrophy | Numbness or tingling in arms and legs, trouble walking or balancing, difficulty swallowing or speaking |
| Reversibility | Disuse atrophy can be reversed with exercise and a healthy diet |
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What You'll Learn
MS and muscle atrophy: benign or ALS?
Spinal Muscular Atrophy (SMA) is a genetic disorder that causes certain muscles to weaken and waste away. It is a neuromuscular disorder that affects the central nervous system, peripheral nervous system, and voluntary muscle movement. SMA involves the loss of nerve cells called motor neurons in the spinal cord. There are five subtypes of SMA, which range in severity and age of onset. The most common form of SMA is caused by changes in the survival motor neuron gene 1 (SMN1). SMA type 3 symptoms include lower limb muscle weakness, leading to difficulty walking. SMA type 4 is the mildest form of SMA and doesn't typically appear until after the age of 21.
Multiple sclerosis (MS) is a disease that can also cause muscle atrophy. When muscular atrophy develops in MS patients, its etiology may vary from benign to serious. In rare cases, MS patients can develop amyotrophic lateral sclerosis (ALS), a motor neuron disease that shares some similarities with SMA. Individuals with MS infrequently develop idiopathic benign hand muscle atrophy, reported in up to 6% of those with typical MS. However, it is important to carefully evaluate MS patients with muscular atrophy to rule out the concomitant development of motor neurone disease (MND) or ALS.
While SMA is primarily a genetic condition that usually affects children, ALS typically develops in adults between the ages of 55 and 75, and its cause is largely unknown. SMA and ALS are both motor neuron diseases that affect muscle movement, but they have distinct differences in how they develop and who they affect. SMA is caused by changes in the SMN1 gene, while ALS is believed to be due to a combination of gene mutations and environmental factors.
Treatments for SMA include nusinersen (Spinraza), which increases production of the SMN protein, and onasemnogene abeparovec-xioi (Zolgensma), a gene therapy that replaces the SMN1 gene function. Physical therapy, occupational therapy, and rehabilitation can also help improve posture, prevent joint immobility, and slow muscle weakness and atrophy in people with SMA. While there is no cure for SMA, certain therapies and medications can help manage symptoms.
In summary, SMA is a genetic disorder that causes muscle atrophy and weakness, primarily affecting children. ALS is a motor neuron disease that can develop in rare cases of MS and typically affects adults. Treatments for SMA include medications, gene therapy, and physical therapy, while the focus for ALS is on managing symptoms as there is no cure for either disease. It is important for MS patients with muscular atrophy to be carefully evaluated to rule out the development of ALS.
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MS and atrophy: symptoms and diagnosis
Multiple System Atrophy (MSA) is a rare neurological disease that causes certain brain areas to deteriorate. It is a fatal disease with no cure or direct treatment. However, many of its symptoms are treatable, and there may be ways to minimize their effects. MSA affects adults over the age of 30, with symptoms most likely to start between ages 50 and 59. It is not uncommon for people with a Parkinson's disease diagnosis to later have that diagnosis modified to MSA due to new symptoms or medication ineffectiveness.
MSA causes deterioration in different brain areas, and the symptoms depend on the areas affected. The parts of the brain most commonly affected include the basal ganglia and the brainstem. The basal ganglia are structures near the center of the brain that link many different areas, creating a critical network for cooperative functioning. The brainstem manages key autonomic processes that are necessary for survival, such as movement, balance, involuntary functions like blood pressure and bladder control, and automatic body processes.
The symptoms of MSA can be motor-related and autonomic, impacting movement control and the autonomic nervous system. Parkinsonian symptoms, such as slowness of movement and rigidity, are often present. MSA can also lead to significant motor symptoms affecting the legs, as well as problems with coordination, balance, and speech. Respiratory infections, scoliosis, and joint contractures (chronic shortening of muscles and tendons) are additional complications that may arise.
Diagnosing MSA is challenging because many symptoms overlap with other conditions like Parkinson's disease or corticobasal degeneration. To determine a possible diagnosis, doctors may perform a physical exam and digital imaging tests, such as an MRI or CT scan. A tilt table test may be conducted to evaluate blood pressure issues, and automatic functions may be assessed. A blood test is also available to look for mutations or deletions of the SMN1 gene, which is associated with SMA, a genetic disease affecting the central nervous system and voluntary muscle movement.
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MS and atrophy: treatment and management
Multiple sclerosis (MS) is an autoimmune condition that affects the brain and spinal cord (central nervous system). It damages the protective cover around nerves called myelin, causing muscle weakness, vision changes, numbness, and memory issues. While there is no cure for MS, treatments can help manage symptoms and slow disease progression.
Muscle atrophy is the wasting or thinning of muscle mass. It can be caused by disuse of muscles or neurogenic conditions. In the context of MS, muscle atrophy is a secondary symptom resulting from inactivity due to other MS symptoms, such as fatigue and pain. Treatment options for muscle atrophy in the context of MS include:
Treatment and Management
- Physical Therapy: Physical therapy and exercise can help improve posture, prevent joint immobility, and slow muscle weakness and atrophy. Pool-based exercises can be particularly beneficial as they reduce the muscle workload.
- Occupational Therapy: This can include the use of assistive mobility devices like a cane, walker, or wheelchair to improve mobility and reduce disuse atrophy.
- Systemic Medications: Systemic medications are used to manage the underlying MS condition and can help with overall symptom management.
- Steroid Therapy: Short-term steroid therapy may be recommended during an MS relapse with active lesions to reduce inflammation and improve muscle weakness caused by lesions or myelin deterioration.
- Potassium Channel Blockers: These can help individuals with MS walk faster.
- Plasma Exchange (Plasmapheresis): This may be suggested if the body does not respond well to certain medications during an MS attack.
- Deep Brain Stimulation: This is used to manage muscle spasms (tremors).
- Antiseizure Medications or Antispasmodic Medications: These are used to manage pain associated with MS.
It is important to note that the treatment options for muscle atrophy in the context of MS may vary depending on the specific cause of the atrophy and the severity of the condition. Additionally, while disuse atrophy can often be reversed with exercise and a healthy diet, neurogenic atrophy, caused by physical damage to nerves, may be more challenging to treat and typically focuses on slowing the progression and managing symptoms.
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MS and atrophy: impact on the central nervous system
Multiple sclerosis (MS) is an autoimmune disease that affects the central nervous system. It can cause a range of symptoms, including muscle atrophy, which is the wasting or thinning of muscle mass. While muscle atrophy is not a common finding in MS, it can occur in rare cases.
The impact of MS on the central nervous system is complex and varies from person to person. MS is a disease that affects the myelin sheath, which is the protective covering that surrounds nerve fibres. In MS, the myelin sheath becomes damaged, which interferes with the transmission of nerve signals. This disruption of nerve signals can lead to a variety of symptoms, including muscle weakness, coordination problems, sensory issues, and in some cases, muscle atrophy.
Muscle atrophy in MS typically occurs due to the neurogenic causes, specifically nerve problems or diseases. The nerve damage caused by MS can interfere with the signals that control muscle movement, leading to disuse and wasting of the muscles. This is particularly common in the limbs, as the nerves that control limb movement are often affected in MS. Additionally, the spinal cord, which houses most of the nerve cells that control muscles, can be impacted by MS, leading to spinal muscular atrophy (SMA).
SMA is a group of hereditary diseases that affect motor neurons, which are specialized nerve cells that control voluntary movement and skeletal muscle activity. There are five subtypes of SMA, ranging in severity and age of onset. SMA can cause muscle weakness and wasting, particularly in the lower limbs, and can lead to difficulties with walking and movement. While SMA is typically a genetic condition, it is possible for individuals with MS to develop SMA concurrently, which can exacerbate muscle atrophy.
The treatment options for muscle atrophy in the context of MS aim to address both the MS and the atrophy. Physical therapy, occupational therapy, and rehabilitation can help improve posture, prevent joint immobility, and slow muscle weakness and atrophy. Additionally, medications such as nusinersen (Spinraza™) and onasemnogene abeparovec-xioi (Zolgensma™) can increase the production of the SMN protein, which is crucial for maintaining the health and function of motor neurons. A healthy diet and regular exercise can also help to recover from muscle atrophy and improve overall strength.
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MS and atrophy: impact on spinal curvatures
Spinal muscular atrophy (SMA) is a genetic condition that causes muscle weakness and wasting, with the muscles closest to the body's centre—such as those in the shoulders, hips, thighs, and upper back—being the most affected. Lower limbs are impacted more than upper limbs. While SMA is not caused by multiple sclerosis (MS), MS can cause scoliosis, a curvature of the spine, which is a form of spinal deformity. Scoliosis can also be linked to degenerative arthritis from wear and tear of the vertebrae, as well as osteoporosis, a condition caused by low bone density, which people with MS are at greater risk of developing.
Degenerative scoliosis may be worsened by weakness of the muscles that support the spine. MS can cause numbness or paralysis, damage to the spinal cord, and other neurological issues that affect the mobility of the spine. These factors can make it difficult for the muscles and nerves of the spine to align properly, leading to balance impairment. Degenerative scoliosis from arthritis or osteoporosis could be made worse by damage caused by MS lesions, resulting in more serious spinal curvature and dysfunction.
In severe cases of scoliosis, the curvature can affect posture, cause pain and neurological problems, and impact breathing, walking, and daily living. The shoulders or waistline may appear uneven, with one hip higher than the other or a protruding rib cage. Some people with scoliosis lean to one side or forward while sitting or standing. The effects of scoliosis vary, but it can cause significant disability, including loss of height, numbness, weakness, or abnormal alignment of the pelvis and hips. The spinal curve for people with neuromuscular conditions like MS tends to worsen over time, and people with MS tend to have more complications after surgery to correct spinal deformities.
To improve postural stability, people with MS-related scoliosis can try to keep their head and shoulders as upright as possible, look a few feet in front of them instead of down, keep their head in line with their shoulders, and keep their knees slightly bent and feet slightly apart to avoid shifting their weight to one side. Doctors can advise on the best ways to protect posture and manage back pain.
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Frequently asked questions
Muscle atrophy is the wasting or thinning of muscle mass. It can be caused by malnutrition, age, genetics, lack of physical activity, or certain medical conditions.
Muscle atrophy can be caused by the disuse of muscles or neurogenic conditions. The latter occurs due to nerve problems or diseases.
Yes, individuals with multiple sclerosis (MS) can develop muscle atrophy. However, it is reported to be infrequent, occurring in up to 6% of those with typical MS.
Symptoms include a decrease in muscle mass, weakness, numbness, and tingling in the limbs. In the case of neurogenic atrophy, there may also be trouble with speaking and swallowing.
While there is no cure for muscle atrophy, disuse atrophy can be reversed with regular exercise and a healthy diet. Recovery time depends on the type of atrophy and the severity of the condition.
