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Spasticity is a symptom of certain neurological conditions, causing muscles to contract all at once and affecting movement and speech. It is usually caused by damage to nerve pathways within the brain or spinal cord that control movement and stretch reflexes. While spasticity can vary in severity, it can cause painful, uncontrollable stiffness and spasms, leading to muscle atrophy or muscle wasting. This occurs when a person stops using certain muscles due to spasticity, resulting in the muscle wasting away and appearing smaller. Various treatments are available for spasticity, including physical therapy, medication, and botulinum toxin injections, which can help alleviate symptoms and improve quality of life.
| Characteristics | Values |
|---|---|
| Definition | Spasticity is a symptom and characteristic of certain neurological conditions. It causes certain muscles to contract all at once. |
| Cause | Spasticity is usually caused by damage to nerve pathways within the brain or spinal cord that control movement and stretch reflexes. |
| Conditions | Spasticity may occur due to several conditions, including spinal cord injury, multiple sclerosis (MS), cerebral palsy, brain or head injury, amyotrophic lateral sclerosis (ALS), hereditary spastic paraplegias, adrenoleukodystrophy (ALD), phenylketonuria, and Krabbe disease. |
| Symptoms | Increased muscle tone (hypertonia), muscle spasms, clonus, involuntary leg crossing, pain or discomfort, abnormal posture, contracture, muscle/joint/bone deformities, difficulty with daily activities, and sleep disruption. |
| Treatment | Physical therapy, medication (e.g., muscle relaxants, antiseizure medication), botulinum toxin injections, and selective dorsal rhizotomy (SDR). |
| Muscle Atrophy | Prolonged spasticity can lead to muscle atrophy by causing muscles to stop being used, but muscle wasting is less of a concern with spastic paralysis compared to flaccid paralysis. Treatments like FES cycling can help limit muscle atrophy and even increase muscle mass. |
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What You'll Learn
Spasticity and muscle atrophy: causes and treatments
Spasticity is a symptom and characteristic of certain neurological conditions. It causes certain muscles to contract all at once, affecting movement and speech. It is usually caused by damage to nerve pathways within the brain or spinal cord that control movement and stretch reflexes. This damage can be due to an imbalance in the inhibitory and excitatory signals sent to the muscles, causing them to lock in place.
Spasticity can vary in severity, ranging from mild tightness in the muscles to painful, uncontrollable stiffness and spasms. It can interfere with daily life, making it difficult to perform basic hygiene tasks and care. This can increase the risk of developing pressure injuries and infections. Left untreated, spasticity can lead to frozen joints, bone fractures, dislocation of joints, and other serious complications.
Spasticity can also lead to muscle atrophy, or muscle wasting, when a person stops using certain muscles due to the condition. However, muscle atrophy is a higher risk for those with flaccid paralysis, where muscles become weak and limp due to a complete absence of nerve signals. Treatments for spasticity aim to alleviate symptoms and improve quality of life. They include physical therapy, medication, and botulinum toxin injections.
For those experiencing muscle atrophy and spasticity, FES cycling has been shown to be an effective rehabilitative tool, limiting muscle loss and atrophy while increasing muscle mass. Physical therapy can also help lengthen and strengthen muscles, improving overall muscle function. In addition, muscle relaxants and other medications can be used to ease spasms and stiffness by relaxing the muscles.
It is important to seek medical care when experiencing spasticity for the first time or when symptoms worsen. A doctor may refer the patient for further testing, such as neurological examinations and imaging, to determine the best course of treatment.
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The impact of spasticity on muscle movement
Spasticity is a symptom and characteristic of certain neurological conditions, such as multiple sclerosis (MS) and cerebral palsy. It causes certain muscles to contract all at once, disrupting normal fluid movement. The muscles remain contracted and resist being stretched, which affects a person's movement, speech and gait.
Spasticity can vary in severity, from mild feelings of muscle tightness to painful, uncontrollable stiffness and spasms. The faster a person with spasticity tries to move, the worse the tightness gets, and it can also occur when a person is at rest. The spasms can be sudden and unpredictable, causing parts of the body to arc, bend, clamp together or kick out. This can lead to abnormal posture and bone and joint deformities.
Spasticity can cause a person to stop using certain muscles, which can lead to muscle atrophy, or muscle wasting. However, muscle wasting is less of a concern with spastic paralysis than it is with flaccid paralysis, where there is a complete absence of nerve signals to the muscles. Treatments for spasticity include physical therapy, medication and botulinum toxin injections.
Physical therapy and rehabilitative exercise can help to manage spasticity and reduce muscle loss. FES cycling, for example, has been found to be effective in limiting muscle loss and atrophy, and can even increase muscle mass when used regularly.
Spasticity can also lead to contractures, where joints become frozen in place due to the shortening of the muscle. This can be prevented with effective stretching, positioning and medication.
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Spasticity and spinal muscular atrophy (SMA)
Spasticity is a symptom and characteristic of certain neurological conditions. It causes certain muscles to contract all at once and can affect movement and speech. It is usually caused by damage to nerve pathways within the brain or spinal cord that control movement and stretch reflexes.
Spinal muscular atrophy (SMA) is a genetic neuromuscular disorder that causes muscle weakness. It is a genetic disease affecting 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 and is classified as a motor neuron disease. The primary symptom of SMA is weakness of the voluntary muscles, especially those closest to the center of the body, such as the shoulders, hips, thighs, and upper back.
SMA can cause a person to have fewer motor neurons in their spinal cord, which can lead to spasticity. The spasticity experienced by people with SMA occurs when the muscles are not well-controlled by motor neurons. This can result in involuntary movements such as spasms or clonus, which can be painful and lead to increased muscle tone, abnormal posture, and deformities of the bone and joints. It can also affect speech and gait, reducing mobility and physical functioning.
There are several treatment options for spasticity in people with SMA. Muscle relaxants such as Baclofen, Tizanidine, and Benzodiazepines can be used to help lengthen and strengthen muscles and avoid or counteract spasticity. Physical therapy can also be beneficial, as it can help improve mobility and prevent contractures. Additionally, a surgical procedure called rhizotomy, which involves cutting out abnormal sensory nerves along the spine, may help relieve spasticity while preserving other motor and sensory functions. It is important for people with SMA to work with a care team of professionals, including physicians, nurses, and physical therapists, to manage spasticity and address their unique symptoms and needs.
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Managing spasticity: physical therapy and medication
Spasticity is a symptom and characteristic of certain neurological conditions. It causes certain muscles to contract all at once and can affect movement and speech. Spasticity can vary from mild to severe and can cause painful, uncontrollable stiffness and spasms. It can also lead to abnormal posture, bone and joint deformities, and difficulty performing daily activities.
Managing spasticity often involves a team of healthcare professionals with different specialties, including physical therapists, occupational therapists, speech therapists, neurologists, and surgeons. Treatment options range from conservative approaches, such as physical therapy and splinting, to more aggressive interventions like surgery.
Physical Therapy
Physical therapy plays a crucial role in managing spasticity. Physical therapists focus on lower extremity stretching and strengthening exercises, mobility training, and gait improvement. They employ techniques such as ultrasonography, electrical stimulation, and biofeedback to reduce muscle spasticity and improve function. Physical therapy can also include aquatic therapy and hippotherapy. Additionally, daily stretching exercises can help lengthen the muscles, preventing contractures and reducing spasticity.
Medication
Oral medications are commonly prescribed to manage spasticity, especially when it disrupts daily functioning or sleep. These medications include:
- Baclofen (Lioresal)
- Tizanidine (Zanaflex)
- Dantrolene sodium (Dantrium)
- Diazepam (Valium)
- Clonazepam (Klonopin)
- Gabapentin (Neurontin)
These oral medications can cause side effects such as drowsiness and weakness. Therefore, drug dosages should be regularly reviewed to monitor tolerance and adjust treatment accordingly.
Injectable neurolytic medications, such as botulinum toxin (Botox) and phenol, are also effective in treating spasticity. These injections relax specific spastic muscles, improving comfort, positioning, and function. Intrathecal baclofen (ITB) therapy is another option, involving the surgical placement of a pump that delivers baclofen directly into the spinal fluid. This approach has been shown to significantly reduce spasticity and pain while lowering the risk of drowsiness compared to oral baclofen.
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Spasticity and multiple sclerosis (MS)
Spasticity is a symptom and characteristic of certain neurological conditions, including multiple sclerosis (MS). It causes certain muscles to contract all at once, either when moving or at rest, and interferes with movement and speech. The severity of spasticity varies, ranging from a mild feeling of muscle tightness to painful, uncontrollable stiffness and spasms.
In the context of MS, spasticity and spasms are common symptoms, causing muscles to feel stiff, heavy, and difficult to move and bend. These symptoms can affect individual muscles or a group of muscles in a particular area, most commonly in the legs, arms, and trunk, and can also impact speech and swallowing. The increased muscle tone associated with spasticity leads to a tightness or resistance that intensifies with faster movement, resulting in slower movements.
Spasticity in MS can cause muscles to twitch or jerk uncontrollably, leading to sudden exaggerated movements that can affect balance and sleep. These involuntary movements are known as spasms, which can be painful and uncomfortable. Prolonged spasticity and spasms can lead to restricted movement, with muscles shortening due to lack of use. Without effective management, this can progress to contractures, where joints become permanently fixed in position.
To manage spasticity and spasms in MS, various treatment options are available, including physiotherapy, drug treatments, and electrical stimulation. Health professionals may recommend stretching exercises, regular movement, and learning about triggers to reduce the risk of complications and improve quality of life.
It is important to note that spasticity is not limited to MS and can also occur due to spinal cord injuries, cerebral palsy, brain injuries, and other neurological conditions.
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Frequently asked questions
Spasticity is a symptom and characteristic of certain neurological conditions. It causes certain muscles to contract all at once and interferes with movement and speech. It can range from mild tightness in the muscles to painful, uncontrollable stiffness and spasms.
Spasticity is caused by damage to nerve pathways within the brain or spinal cord that control movement and stretch reflexes. It can occur due to conditions such as spinal cord injury, multiple sclerosis (MS), cerebral palsy, brain or head injury, and hereditary spastic paraplegias, among others.
Treatment options for spasticity include physical therapy, medication, and botulinum toxin injections. Physical therapy helps to lengthen and strengthen muscles, while medications such as muscle relaxants can ease spasms and stiffness. Botox injections can also be used to inhibit muscle contractions.
While spasticity itself does not directly cause muscle atrophy, the involuntary muscle contractions associated with spasticity can lead to reduced movement and disuse of certain muscles over time. This decreased muscle activity can result in muscle atrophy, where the muscle wastes away and appears smaller. Therefore, while spasticity is not the direct cause, it can indirectly contribute to muscle atrophy if left untreated.
