Tonic-Clonic (Grand Mal) SeizureNot what you're looking for? Show
OverviewA tonic-clonic seizure, also called a grand mal seizure, causes violent muscle contractions and loss of consciousness. These are the types of seizures most people know about, and what they usually picture when they think about seizures in general. They are the most common type of generalized seizure, or seizure that affects the whole body. The muscles of the arms and legs stiffen during the first part of the seizure, called the tonic part. Then, the muscles of the arms, legs and face begin to jerk during the second phase of the seizure, known as the clonic part. Some patients may only experience one part of the seizure. Others may experience both. Tonic-clonic seizures last between one and three minutes. Any seizure lasting longer than 5 minutes will need medical attention. SymptomsSymptoms of a tonic-clonic seizure may include:
After the seizure the patient may experience:
Causes and Risk Factors These seizures are usually caused by epilepsy. They are also linked to other conditions, such as:
DiagnosisA detailed description of what happened during your seizure is important to making a correct diagnosis. Your doctor will likely need to speak to a witness who has seen your seizures, as people tend to go unconscious during grand mal seizures. The doctor will also perform a neurological exam. These examinations look at the muscles, including reflexes, muscle tone, and strength. They also look at how you walk, balance, coordination and posture. One of the most useful tools for diagnosis an electroencephalogram (EEG). This records electrical activity in the brain. The EEG can record unusual spikes or waves in electrical activity patterns. Different types of epilepsy can be identified with these patterns. Magnetic resonance imaging (MRI) and computed tomography (CT) scans may be used to look at the cause and the location within the brain. The scans can show scar tissue, tumors or structural problems in the brain. TreatmentCorrect treatment can help reduce or prevent seizures. In some cases, treatment can help patients to remain free of seizures for the rest of their lives. Factors that affect treatment include:
Anti-seizure (or anti-epileptic) medications can be highly effective. It may take a few tries to get the right drug and right amount. Your doctor will work with you to monitor side effects and find the best treatment. Surgery may not be an option for some tonic-clonic seizures. This is because surgery often focuses on treating the area of the brain where the seizure starts. For generalized seizures it is difficult to pinpoint where the seizures start in the brain. © 2000-2022 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions. Not what you're looking for? OverviewA seizure is a sudden, uncontrolled electrical disturbance in the brain. It can cause changes in your behavior, movements or feelings, and in levels of consciousness. Having two or more seizures at least 24 hours apart that aren't brought on by an identifiable cause is generally considered to be epilepsy. There are many types of seizures, which range in symptoms and severity. Seizure types vary by where in the brain they begin and how far they spread. Most seizures last from 30 seconds to two minutes. A seizure that lasts longer than five minutes is a medical emergency. Seizures are more common than you might think. Seizures can happen after a stroke, a closed head injury, an infection such as meningitis or another illness. Many times, though, the cause of a seizure is unknown. Most seizure disorders can be controlled with medication, but management of seizures can still have a significant impact on your daily life. The good news is that you can work with your doctor to balance seizure control and medication side effects. SymptomsWith a seizure, signs and symptoms can range from mild to severe and vary depending on the type of seizure. Seizure signs and symptoms may include:
Doctors generally classify seizures as either focal or generalized, based on how and where abnormal brain activity begins. Seizures may also be classified as unknown onset, if how the seizure began isn't known. Focal seizuresFocal seizures result from abnormal electrical activity in one area of your brain. Focal seizures can occur with or without loss of consciousness:
Symptoms of focal seizures may be confused with other neurological disorders, such as migraine, narcolepsy or mental illness. Generalized seizuresSeizures that appear to involve all areas of the brain are called generalized seizures. Different types of generalized seizures include:
When to see a doctorSeek immediate medical help if any of the following occurs:
If you experience a seizure for the first time, seek medical advice. Get the latest epilepsy information from Mayo Clinic delivered to your inbox.Subscribe for free and receive the latest on epilepsy treatment, care and management. To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and website usage information with other information we have about you. If you are a Mayo Clinic patient, this could include protected health information. If we combine this information with your protected health information, we will treat all of that information as protected health information, and will only use or disclose that information as set forth in our notice of privacy practices. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail. CausesNerve cells (neurons) in the brain create, send and receive electrical impulses, which allow the brain's nerve cells to communicate. Anything that disrupts these communication pathways can lead to a seizure. Some types of seizure disorders may be caused by genetic mutations. The most common cause of seizures is epilepsy. But not every person who has a seizure has epilepsy. Sometimes seizures may be caused or triggered by:
ComplicationsHaving a seizure can sometimes lead to circumstances that are dangerous for you or others. You might be at risk of:
Feb. 24, 2021 Which signs symptoms are observed in the clonic phase of a seizure?Clonic Activity
Jerking movements affect the face, arms and legs, becoming intense and rapid. After one to three minutes, the jerking movements slow down and the body relaxes, sometimes including the bowel or bladder. The person may let out a deep sigh and return to more normal breathing.
What are the 3 signs of a clonic tonic seizure?What is a tonic-clonic seizure?. All the muscles stiffen.. Air being forced past the vocal cords causes a cry or groan.. The person loses consciousness and falls to the floor.. A person may bite their tongue or inside of their cheek. If this happens, saliva may look a bit bloody.. What does the clonic stage of a seizure consist of?Clonic seizures are characterized by repeated jerking movements of the arms and legs on one or both sides of the body, sometimes with numbness or tingling. If it is a focal (partial) seizure, the person may be aware of what's happening.
What are the 4 stages of a tonicThe four phases of seizure are:. Prodromal.. Early ictal (the “aura”). Ictal.. Postictal.. |