In a seizure, what part of the body is primarily affected?

Seizures primarily originate in the brain, which is responsible for controlling and coordinating all bodily functions, including movement, sensation, and consciousness. When a seizure occurs, abnormal electrical activity in the brain leads to various physical symptoms, which can include convulsions, altered awareness, and changes in behavior or sensations.

While seizures can affect other parts of the body, such as causing muscle contractions or respiratory changes, the root cause is the disruption of normal brain activity. Thus, understanding that the brain is the primary organ affected in a seizure helps clarify the nature of the condition and the appropriate first-aid responses, such as ensuring the person's safety and preventing injury during the episode.