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11 cze 2021 · A seizure is caused by an abnormal change in the brain’s electrical activity. An event or condition that disrupts the communication between nerve cells, or neurons, in the brain...
5 dni temu · The aura is the first symptom of a seizure. Symptoms during the aura may include the feeling that a person or place is familiar, called deja vu, or a feeling that a person or place is not familiar. Or people may simply feel strange, feel fear or panic, or even have good feelings.
Syncope. Caused by cerebral hypoperfusion, syncope presents as an abrupt and complete loss of consciousness and postural tone followed by a rapid spontaneous recovery (Table 1). A nonepileptic convulsion may occur during syncope.
Not everyone experiences warning signs before a seizure. What causes a seizure? A surge of electrical activity in your brain causes a seizure. Neurons (nerve cells) communicate by sending electrical signals to different parts of your brain. When a seizure happens, the affected brain cells fire signals uncontrollably to others around them.
Anything that interrupts the normal connections between nerve cells in the brain can cause a seizure. This includes a high fever, high or low blood sugar, alcohol or drug withdrawal, or a brain concussion. But when a person has 2 or more seizures with no known cause, this is diagnosed as epilepsy.
14 paź 2023 · 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.
15 kwi 2014 · A seizure is a clinical manifestation of presumed or proved abnormal electrical activity in the brain. A first seizure can range from a fleeting subjective experience such as déjà vu or a twitch (myoclonic jerk) through to a tonic-clonic convulsion. Some seizure manifestations overlap with normal phenomena.
