An atypical absence seizure, like its name, means different from the norm; not a typical absence seizure. As with absence seizures (posted on the March 1st), consciousness is lost and with the atypical the person may be conscious.
Symptoms such as blinking and facial jerking may be present and can be even more difficult to spot as the individual is responsive.
Rapid breathing can be a trigger for typical absence seizures and this is not the case with atypical. The characteristics are that the seizures themselves begin and finish gradually. The duration is normally a minimum of 10 seconds to 30 and they can occur individually or in clusters.
While these seizures tend to affect children, they often go hand in hand with Lennox Gastaut Syndrome, a very severe form of childhood epilepsy.