Simple partial seizures affect a small area of the brain and the child stays awake throughout. The seizure may be restricted to either rhythmical twitching of one limb or part of a limb, or to unusual tastes or sensations such as pins and needles in a specific part of the body. Simple partial seizures often mark the start of some other form of seizure. They can spread across the whole brain developing into other sorts of seizure and because of this they may be referred to as a 'warning' or 'aura'.