Seizures - Symptoms and causes - Mayo Clinic
2024年11月1日 · A seizure is a sudden burst of electrical activity in the brain. It can cause changes in behavior, movements, feelings and levels of consciousness. Epilepsy is defined as having two or more seizures at least 24 hours apart that don't have a known cause. But epilepsy doesn't cause all seizures.
Seizure: What It Is, Causes, Symptoms, Treatment & Types
When seizures happen, the flow of electrical signals in your brain is disrupted. What is a seizure? A seizure (pronounced “see-zhr”) is a surge of abnormal electrical activity in your brain. The most recognizable symptoms of a seizure are a temporary loss of consciousness and uncontrollable movements (convulsions).
Seizure disorder: Types, causes, and more - Medical News Today
2021年9月10日 · A range of conditions may cause seizures. The three major types of seizure disorders are epileptic seizure disorder (ESD), psychogenic nonepileptic seizures, and nonepileptic seizures.
Epilepsy and Seizures | National Institute of Neurological ...
2025年1月8日 · Epilepsy is a chronic brain disorder in which groups of nerve cells, or neurons, in the brain sometimes send the wrong signals and cause seizures. Epilepsy (sometimes referred to as a seizure disorder) can have many different causes and seizure types.
Seizure Disorders - Neurologic Disorders - MSD Manual ...
A seizure is an abnormal, unregulated electrical discharge that occurs within the brain’s cortical gray matter and transiently interrupts normal brain function. A seizure typically causes altered awareness, abnormal sensations, focal involuntary movements, or convulsions (widespread violent involuntary contraction of voluntary muscles).
Epilepsy - Symptoms and causes - Mayo Clinic
2023年10月14日 · Epilepsy — also known as a seizure disorder — is a brain condition that causes recurring seizures. There are many types of epilepsy. In some people, the cause can be identified. In others, the cause is not known. Epilepsy is common.
Seizures: Causes, Symptoms, and Treatment - WebMD
2023年12月4日 · What Is a Seizure? A seizure is abnormal electrical activity in the brain that happens quickly. It may go nearly unnoticed. In serious cases, it may cause unconsciousness and...
Epilepsy: What It Is, Causes, Symptoms, Diagnosis & Treatment
Epilepsy is a long-term (chronic) disease that causes repeated seizures due to abnormal electrical signals produced by damaged brain cells. A burst of uncontrolled electrical activity within brain cells causes a seizure.
Seizure Disorders - Brain, Spinal Cord, and Nerve Disorders ...
Doctors diagnose a seizure disorder (epilepsy) when people have at least two unprovoked seizures that occur at different times. People who lose consciousness, sometimes even when they lose muscle tone and muscles jerk, may not be having a seizure.
Understanding Seizures | Is It Epilepsy ... - Epilepsy Foundation
Seizures involve sudden, temporary, bursts of electrical activity in the brain that change or disrupt the way messages are sent between brain cells. These electrical bursts can cause involuntary changes in body movement or function, sensation, behavior or awareness. Every brain has the potential to seize.