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Muscle convulsions are involuntary muscle contractions that cause erratic movements and impaired consciousness. They are often associated with seizures, particularly in epilepsy, but they can also occur without a seizure. Convulsions can be caused by a range of factors, including fever, head trauma, certain medications, and exposure to toxins. They are characterised by sudden, violent, and irregular movements, and those experiencing them have no control over their bodies. While convulsions are typically obvious, they can sometimes be subtle, and a person may experience them without being aware.
| Characteristics | Values |
|---|---|
| Definition | Rapid, involuntary muscle contractions |
| Movement | Erratic, violent, irregular, jerky |
| Consciousness | Impaired |
| Duration | A few seconds to several minutes |
| Causes | Epilepsy, low blood sugar, fever, head trauma, drugs, alcohol, toxins, medication, infection, tetanus, severe fever, inflammatory brain infection |
| Treatment | Psychological therapies, CBT, cooling with lukewarm water, Tylenol |
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What You'll Learn
Convulsions are rapid, involuntary muscle contractions
Convulsions are the result of disrupted nerve cell activity in the brain, which causes muscles to contract and spasm uncontrollably. This can lead to jerky, erratic movements and impairments of consciousness. The duration of these episodes varies, typically lasting from a few seconds to several minutes, but they can last longer in some cases.
Seizures are characterised by physical changes in behaviour due to abnormal electrical activity in the brain. There are many different types of seizures, and they can be caused by various factors such as illness, medication, or other medical conditions. Some seizures, such as tonic-clonic seizures, are characterised by convulsions, while others may not be.
Epilepsy is a chronic neurological condition that involves recurring seizures not attributed to another known cause. It is a common cause of seizures and convulsions, but other factors can also lead to convulsions without epilepsy being present. For example, febrile convulsions are caused by a sudden spike in body temperature and are common in infants and children. They are usually harmless and do not indicate an increased risk of developing epilepsy.
In addition to epilepsy and fever, convulsions can be caused by various medical conditions, including low blood sugar, head trauma, severe fever, inflammatory brain infection, exposure to toxins, and certain medications. Drug overdose, alcohol poisoning, and drug withdrawal can also induce convulsions and seizures. Paroxysmal kinesigenic dyskinesia (PKD) is a rare genetic condition that can cause convulsions triggered by sudden movements or startle responses.
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Convulsions are often symptoms of seizures
Convulsions are rapid involuntary muscle contractions. They are often symptoms of seizures but are distinct from them. While convulsions are a symptom of seizures, not all seizures will result in convulsions, and convulsions can also occur without seizures.
Seizures are abnormal electrical activity in the brain, which can cause physical changes in behaviour and consciousness, muscle control, and changes in sensations or awareness. The most recognisable symptoms of a seizure are a temporary loss of consciousness and uncontrollable movements (convulsions). However, seizures can manifest in many different ways, and symptoms vary based on the type and severity of the seizure. For example, focal seizures can start in one part of the brain and spread to other areas, causing mild or severe symptoms depending on how much of the brain is affected.
Convulsions are common in some types of seizures and are considered the most recognisable symptom. The most common type of seizure that causes convulsions is called a tonic-clonic seizure. "Tonic" means stiffening, and "clonic" means jerking, which are the primary characteristics of this type of seizure. During a tonic-clonic seizure, a person's muscles stiffen, they lose consciousness, and they experience convulsions. In addition to convulsions, people may groan as air travels forcefully past their vocal cords. Other types of seizures that can cause convulsions include febrile seizures, which typically last up to 5 minutes and usually do not have any lasting negative impact.
It is important to note that not all seizures result in convulsions. For example, tonic seizures cause a person to pass out and their muscles to tighten up, but they do not experience convulsions. Focal onset aware seizures, also known as simple partial seizures, are another type where the person is aware and able to remember the seizure, but convulsions are not a typical symptom. Instead, the person may experience confusion, fear, joy, anxiety, teeth clenching, abnormal eye movements, or loss of bladder or bowel control.
Convulsions can also occur without seizures. For example, infection, head trauma, and certain drugs can cause convulsions without seizures. Paroxysmal kinesigenic dyskinesia (PKD) is a rare genetic condition that causes convulsions without seizures. PKD seizures typically happen after a sudden motion, such as being startled or standing up, and can last less than 5 minutes.
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Epileptic seizures are electrical disturbances in the brain
Convulsions are rapid involuntary muscle contractions that can occur during seizures. Several different conditions can cause convulsions, including epilepsy. Epilepsy is a chronic brain disorder that affects around 3.4 million people in the US and 65 million people worldwide. It is characterised by nerve cells that do not signal properly, resulting in seizures. These seizures are caused by uncontrolled bursts of electrical activity that disrupt the normal patterns of nerve cell activity and can lead to changes in sensations, behaviours, awareness, and muscle movements.
During an epileptic seizure, a surge of excessive electrical activity occurs as many neurons send signals simultaneously, much faster than normal. This disturbance can cause involuntary movements, sensations, emotions, and behaviours, as well as a loss of awareness. The physical changes that occur during a seizure can vary depending on the type of seizure and may include convulsions, stiffening, jerking, groaning, or loss of consciousness.
While epilepsy is a chronic condition without a cure, various treatment options are available to help manage the disease. Up to 70% of people with epilepsy can control their seizures with anti-seizure medications. Other treatments may include special diets, surgery, or cognitive behavioural therapy to address underlying stress or psychiatric disorders.
It is important to note that not all seizures are epileptic. Non-epileptic seizures are "psychogenic" and occur due to mental or emotional stress rather than electrical disturbances in the brain. Paroxysmal kinesigenic dyskinesia (PKD) is a rare genetic condition that causes convulsions without seizures. Febrile seizures, which are often harmless in children, can also cause convulsions that typically last up to 5 minutes.
Status epilepticus refers to a potentially life-threatening condition where a person experiences prolonged seizures lasting over 5 minutes or fails to regain consciousness between recurring seizures. This condition requires immediate medical attention and can be treated with medications, oxygen, intravenous fluids, and in some cases, placement into a coma to stop the seizures.
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Non-epileptic seizures are psychogenic illnesses
Muscle convulsions are rapid involuntary muscle contractions. They often occur during seizures, but they are not the same thing. Convulsions can occur without seizures, and seizures can occur without convulsions. Convulsions are common in some types of seizures and rare in a few other conditions. Seizures are physical changes in behaviour that occur during an episode of abnormal electrical activity in the brain.
PNES presents considerable diagnostic and therapeutic challenges to neurologists, psychiatrists, and other healthcare practitioners. An early and accurate diagnosis is essential to avoid misdiagnosis and unnecessary treatments. Individuals with PNES commonly experience lengthy delays in diagnosis and off-target treatment. With correct identification and diagnosis of PNES, treatment of any psychiatric comorbidities, along with psychotherapy, may decrease the frequency of episodes.
If you or someone near you is experiencing a seizure, do not move the person unless they are in danger or near something hazardous. Do not try to stop the convulsions, as the person has no control over the seizure and is not aware of what is happening. Do not give the person anything by mouth until the convulsions have stopped, and the person is fully awake and alert. If a baby or child is seizing during a high fever, cool the child slowly with lukewarm water and call the child's healthcare provider for further instructions.
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Convulsions can be caused by head trauma, infection, or certain drugs
Muscle convulsions are rapid involuntary muscle contractions. They are common in some types of seizures and can be caused by a variety of conditions, including epilepsy, a condition that causes multiple seizures. Seizures are electrical disturbances in the brain that can cause abnormal movements and perceptions. Tonic-clonic seizures, for example, are characterised by stiffening and jerking movements.
Convulsions can be caused by head trauma, which may result in seizures. Traumatic brain injuries (TBI) can lead to seizures, with the likelihood depending on the location and severity of the injury. Most seizures occur within days or weeks of the injury, but they can also happen months or years later. It is important to note that not everyone who experiences a brain injury will have a seizure.
Infections can also induce convulsions without seizures. For instance, CNS (central nervous system) infections can trigger non-epileptic seizures. These non-epileptic seizures are considered "psychogenic" and are caused by mental or emotional stress. They are treated with psychological therapies such as cognitive behavioural therapy (CBT).
Additionally, certain drugs have been known to cause convulsions and seizures. Drug-induced seizures can be caused by various substances, including cocaine, benzodiazepine withdrawal, antidepressants, antihistamines, stimulants, and isoniazid. Bupropion, in particular, has been identified as a common cause of drug-induced seizures.
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Frequently asked questions
Muscle convulsions are rapid, involuntary contractions of the muscles, resulting in sudden, violent, and erratic movements of the body. They are often caused by disruptions in nerve cell activity in the brain.
Muscle convulsions can be caused by various factors, including epilepsy, low blood sugar, fever, head trauma, and certain medications. They commonly occur during seizures, particularly tonic-clonic seizures, which are characterised by stiffening and jerking movements. However, it's important to note that not all seizures are associated with convulsions, and convulsions can also occur without seizures.
If someone is experiencing muscle convulsions, it is important to remain calm and follow these guidelines:
- Do not move the person unless they are in danger.
- Do not try to stop the convulsions.
- Do not give them anything by mouth until the convulsions have stopped and they are fully awake and alert.
- If the convulsions are caused by a high fever, especially in children, work to lower the fever slowly using lukewarm water. Do not place them in a cold bath.
- Call for medical help if necessary, especially if the person is a child or if the convulsions are prolonged or unusual.
