What is the term for a sensation that signals the onset of an epileptic seizure or a migraine?

The term "aura" specifically refers to the sensory phenomenon that some individuals experience right before the onset of an epileptic seizure or a migraine. An aura can manifest in various forms, such as visual disturbances, sensory changes, or unusual smells. This phenomenon serves as a warning signal that an episode is imminent, allowing individuals the opportunity to prepare for the seizure or migraine.

In the context of seizures, auras are often considered a focal neurological episode that occurs without loss of consciousness. Similarly, in migraines, an aura can precede the severe headache phase, helping individuals to identify the onset of the event.

Other terms in the list do not match this specific description. Manifestation is a broad term that generally refers to the presentation of symptoms or signs of a condition but does not indicate a precursor experience. Prodrome also refers to early signs or symptoms that precede a disease or event, but it encompasses a broader timeframe and range of symptoms, lacking the specific sensory features associated with an aura. The term aftershock typically relates to an event following a significant incident, such as after an earthquake, and is not relevant in the context of seizures or migraines. Thus, "aura" is the most accurate term for the sensation signaling the onset of either an