Athetosis is a symptom of slow, writing movements of fingers, hands, toes, and feet. In some cases it can be observed in arms, necks, tongue, and legs. It is also called athetoid movements. Athetosis is a movement dis-function. It is characterized by involuntary writing movements. These movements may be continuous, slow, and rolling. They may also make maintaining a symmetrical and stable posture difficult. With athetosis, the same regions of the body are repeatedly affected. These typically include the hands, arms, and feet. The neck, face, tongue, and trunk can be involved, too. While athetosis may be continuous, it can get worse with attempts to control movement. For example, if a person with the condition tries to type on a computer keyboard, they may have extreme difficulty controlling where their fingers land and how long they remain.
In most cases, athetosis is a long-term symptom of a chronic condition. As long as the underlying cause exists, the muscle movements will remain.If the disorder is detected early, doctors can begin to look for an underlying condition. Likewise, one may also begin treatment and occupational therapy. This early intervention is the best way to help manage changes in ability and functions.
People with severe forms of the movement disorder will often require a caregiver. The uncontrolled, writhing muscle movements can make day-to-day activities difficult. This includes walking, standing, sitting, and feeding. However, it’s important to remember that there are services available that can increase independence and assist with home modifications, employment, and transportation.
People with athetosis may also experience muscle overflow. This occurs when you attempt to control one muscle or muscle group and experience uncontrolled movement in another muscle group. For example, when you attempt to talk, you may see increased muscle activity in the arm.
Athetosis is often the result of complications from birth. It can also be a symptom of certain neurological diseases. It is caused by stroke or trauma. Causes of athetosis include:
Damage or diseases in this part of the brain may lead to symptoms of athetosis. The basal ganglia are responsible for smoothing out muscle movements and coordinating changes in posture. When they’re not able to control nerve impulses properly, uncoordinated muscle movements may occur. These diseases may include Huntington’s disease, Wilson’s disease, and others.
If a baby is cut off from air supply during birth, their risk for developing athetosis is higher. Asphyxia, or a lack of sufficient oxygen levels, can damage the brain. It also cuts off the supply of necessary nutrients and increases dopamine levels in the brain. These effects may damage the basal ganglia.
In a newborn, high levels of bilirubin after birth can damage the basal ganglia. Treatment may lower levels of the compound, but the blood-brain barrier that protects adults from toxins in the body isn’t properly formed at this young age. Thus, the bilirubin may be able to penetrate the brain and cause lasting damage.
CP is caused by abnormal development or damage to the brain. This damage affects a child’s ability to control muscle movement. CP that’s primarily associated with damage to the basal ganglia is known as athetoid cerebral palsy. This type of CP can be caused by asphyxia and high bilirubin levels.
Drugs that increase the level of dopamine in the brain may damage the basal ganglia and cause symptoms of athetosis.
Athetosis may also occur after a stroke or trauma in adults. Damage to the brain may interfere with neuron movement. This can lead to symptoms of athetosis and other movement disorders.
Diagnosis of athetosis
Athetosis is a symptom of a disorder; it’s rarely a disorder by itself. That’s why the doctor needs to work to diagnose the underlying cause of the movement issues. Once the cause is identified, the doctor can treat it. That should help eliminate or limit symptoms of athetosis.
To diagnose the underlying cause, doctor will perform several tests:
Each of these tools is designed to help the doctor to evaluate the symptoms and rule out possible causes. There are no definitive tests for many of the possible causes of athetosis, so it may take some time before a diagnosis is reached.
Treatment of athetosis
Treatment for the movement disorder focuses on the underlying cause. If the condition that leads to the irregular muscle movements is treated, the accompanying symptoms should be reduced or eliminated. Sometimes, specific treatments may be used to reduce the severity of the movements separate from other treatments. These include:
Athetosis vs. chorea
Athetosis and chorea are very similar. In fact, they can occur together. When they do, they’re jointly called choreoathetosis. Athetosis, with its flowing and writhing movements, is sometimes called slow chorea.
Symptoms of chorea include:
Chorea primarily affects the face, mouth, trunk, and limbs.
Athetosis vs. dystonia
Dystonia is also a movement disorder. It involves involuntary and sustained muscle contractions. This can be twisting, repetitive movements. Like athetosis, dystonia can make maintaining a normal posture difficult.
Symptoms of dystonia include:
Symptoms of dystonia may worsen when you attempt to control muscle movement. Overflow is also common with dystonia. Overflow is when you try to use one group of muscles, but another group begins to move involuntarily.
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