Seizures are one of the most common neurological conditions in dogs. The scientific term for seizure is ictus. A seizure may also be called a convulsion, attack, or fit and is a temporary involuntary disturbance of normal brain function that is usually accompanied by uncontrollable muscle activity. They occur when too much electrical activity is going on in the outer layers of a dogs brain, called the cortex, which is responsible for thought, memory, sensation, and movement. Seizures are the result of muscle responses to an abnormal nerve-signal burst from the brain. They are a symptom of an underlying neurological dysfunction. Toxic substances, metabolic or electrolyte abnormalities andor imbalances cause an uncoordinated firing of neurons in the cerebrum of the brain, creating seizures from mild petit mal to severe grand mal.