What is an aura?

An aura is often described as a perceptual phenomenon that precedes a seizure, serving as a warning sign that a seizure may soon occur. In many cases, individuals may experience specific sensory disturbances, which can include visual or olfactory hallucinations. This phenomenon allows some people to recognize an impending seizure, giving them a chance to prepare or seek safety. The characteristics of the aura can vary widely among individuals; some may perceive unusual smells or see flashes of light, while others might experience a feeling of déjà vu or anxiety.

The other options describe various sensations or feelings related to seizures but do not accurately encapsulate the concept of an aura. For instance, while some individuals may experience feelings of euphoria or changes in heart rate during or after a seizure, these do not reflect the pre-seizure nature of an aura. The physical sensations indicating the end of a seizure would relate more to the postictal state, which occurs after the seizure itself rather than the precursory experience denoted by an aura. Hence, identifying an aura as a visual or olfactory hallucination occurring before a seizure captures its essence accurately.