Anatomy and physiology of seizures Sometimes, due to injury, illness, fever, infection, or other unknown causes, the brain can be affected, resulting in disruption of its functioning. In this case, loss of control over the body and the occurrence of convulsions are possible. Reasons by the court • Epilepsy. • Intoxication. • Seizures in infants and children may be caused by high body temperature, the so-called new febrile convulsions. • Head injury.