What type of seizure is characterized by lasting less than 1 minute, no loss of consciousness, and motor symptoms that start in a single muscle group?

The type of seizure characterized by lasting less than 1 minute, having no loss of consciousness, and motor symptoms that begin in a single muscle group is known as a simple partial seizure. These seizures originate in a specific area of the brain and are marked by the patient remaining fully aware of their surroundings while experiencing involuntary jerking or twitching in a localized area. The duration of these seizures is typically brief, often under a minute, and the lack of impaired consciousness differentiates them from other seizure types such as complex partial seizures, which involve altered awareness, or generalized seizures, which affect the entire brain and result in loss of consciousness.

Absence seizures are also not compatible with the characteristics described, as they usually involve a brief episode of staring and a complete loss of awareness. Thus, the defining traits of a simple partial seizure align perfectly with the characteristics provided in the question.