Tonic-clonic (grand mal) seizure - Symptoms and causes
2023年12月12日 · Tonic-clonic seizures occur when there's a surge of electrical activity over the surface of the brain. Many nerve cells fire at once, much faster than usual. Exactly what causes the changes to occur often is not known. However, tonic-clonic seizures are sometimes caused by underlying health problems, such as: Injury or infection. Traumatic head ...
Tonic-clonic (grand mal) seizure - Diagnosis and treatment - Mayo …
2023年12月12日 · EEG brain activity. An EEG records the electrical activity of the brain via electrodes attached to the scalp. EEG results show changes in brain activity that may be useful in diagnosing brain conditions, especially epilepsy and other conditions that cause seizu
Seizures - Symptoms and causes - Mayo Clinic
2024年11月1日 · Tonic-clonic seizures last for several minutes. Tonic-clonic seizures may start as focal seizures that spread to involve most or all of the brain. Seizure stages. Seizures can have a beginning phase, a middle phase and an end phase. These phases also are called prodrome, ictal and postictal. Prodrome.
Hemifacial spasm - Symptoms and causes - Mayo Clinic
2023年6月28日 · Overview. Hemifacial spasm is a nervous system condition in which the muscles on one side of the face twitch. The cause of hemifacial spasm is most often a blood vessel touching or pulsing against a facial ne
Myoclonus - Symptoms and causes - Mayo Clinic
2023年1月13日 · Causes. Myoclonus may be caused by a variety of underlying problems. It is commonly separated into different types based on what is causing it.
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Epilepsy - Symptoms and causes - Mayo Clinic
2023年10月14日 · Tonic-clonic seizures. Tonic-clonic seizures, previously known as grand mal seizures, are the most dramatic type of epileptic seizure. They can cause a sudden loss of consciousness and body stiffening, twitching and shaking. They sometimes cause loss of bladder control or biting of the tongue. When to see a doctor
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Symptoms - Symptoms - Mayo Clinic
Explore possible causes for your medical symptoms. Find a symptom that begins with the letter A A; Find a symptom that begins with the letter B B
Colon cleansing: Is it helpful or harmful? - Mayo Clinic
2024年5月10日 · Colon cleansing is a process that involves flushing out the large intestine with liquid such as water. It's commonly done before some medical procedures, so that healthcare professionals can see inside the intestine.