Atonic seizure

Medical condition

An atonic seizure is a type of seizure that consists of partial or complete loss of muscle tone that is caused by temporary alterations in brain function. These seizures are brief – usually less than fifteen seconds. They usually begin in childhood and may persist into adulthood. The seizure itself causes no physical injury, but the loss of control, predominantly in trunk muscles, can result in direct injury from falling. Electroencephalography can be used to confirm diagnosis. It is rare and can be indicative of Lennox–Gastaut syndrome . Atonic seizures can occur while standing, walking, or sitting, and are often noticeable by a head drop. Fall injuries may result in impact to the face or head. As with common epileptic occurrences, no first aid is needed post-seizure, except in the instances where falling injuries have occurred. In some cases, a person may become temporarily paralyzed in part of his or her body. This usually does not last longer than 3 minutes.

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