Which type of generalized seizures is characterized by a blank stare?

The type of generalized seizure characterized by a blank stare is the absence seizure. These seizures primarily affect consciousness and result in brief episodes where the individual appears to be "spacing out" or not responding. Absence seizures are often very short, lasting only a few seconds, and can sometimes occur multiple times a day. During the episode, the person may seem unresponsive, and upon return to normal awareness, they typically have no recollection of the event.

This characteristic blank stare is distinct from other types of seizures. In tonic-clonic seizures, there is loss of consciousness and violent muscle contractions, rather than a brief pause in activity. Myoclonic seizures involve sudden muscle jerks and do not present with a blank stare. Atonic seizures, which cause a sudden loss of muscle tone, might lead to a sudden fall or drop of the head but do not specifically involve the absence of awareness. Thus, absence seizures are the only type among the options that fits the description of a blank stare.