4. Loss of Consciousness
Not all seizures will cause a loss of consciousness. However, this is nevertheless a fairly common symptom and especially in the more dramatic forms of seizure such as the tonic-clonic seizure. This is a result of all manner of things.
Simply, too much activity in the brain is likely to confuse it and prevent it from functioning normally. Rather than experiencing the dizzying array of sensory stimulation, bright lights, memories, and more: a patient will instead simply lose consciousness and often this causes them to fall to the ground.
At the same time, the reduction in oxygen reaching the brain, muscle contractions, and many other changes can all also contribute to the individual suddenly losing consciousness. Usually, when the patient starts to feel better, they will then regain that consciousness – unsure of precisely what happened.