Seizures are caused by a sudden surge of electrical activity in the brain. A seizure usually affects how a person looks or acts for a short time. Someone having a seizure might collapse, shake uncontrollably, or even just stare into space. All of these are brief disturbances in brain function, often with a loss of or change in consciousness. Dr. Pargat Singh Bhurji chats with Harjinder Thind about this frightening issue.