![]() These seizures occur suddenly and for no known reason. This type of seizure has subtypes including: Generalized onset seizures affect multiple areas of the brain at the same time. The initial seizure may be considered an aura. Individuals having a secondary generalized seizure will have a focal seizure followed immediately by a generalized seizure. These seizures start in one area of the brain but spread to both sides. They may also have involuntary actions, called automatisms, like lip smacking, rapid blinking, gulping, or vocalizations like grunting or shouting. Individuals having a complex focal seizure may be unresponsive, staring into space. This type of seizure is the most common type to follow an aura. Auras may be a type of simple focal seizure. They may experience twitching in a specific area of the body, experience a strange taste or smell, or feel frozen. Individuals with simple focal seizures generally remain conscious and aware. These seizures occur in a small area of the brain and last a short period of time, 1 to 2 minutes. Seizures are classified into types: Focal onset seizuresįocal onset seizures, also called partial onset seizures, occur in one specific area of the brain.įocal seizures may be broken down to three main types: In other cases, the response is more severe, with violent jerking and shaking or a loss of consciousness. Sometimes, this response is barely noticeable, and a person may appear to stare out into space. Seizures are the body’s response to a change in the brain’s electrical system. There are a number of causes for seizures, including: To understand why seizure auras happen, you also need to understand what causes seizures. ![]() For some people, auras can be unusual things like a song, a color, or even a specific memory. Once created, that neural connection acts as a precursor or warning for any seizure that occurs on that specific pathway. Some experts believe that auras are caused when a seizure creates a new pathway in the brain that crosses an existing neural pathway for a feeling, sensation, smell, sight, or sound - and forms a permanent connection. Seizures and auras are both the result of a disruption in electrical signals in the brain. They can be detected during an electroencephalogram (EEG), a test that measures electrical signals in the brain. Some believe auras are simply a warning sign of a coming seizure, but many consider them small seizures. ![]()
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