Which syndrome is characterized by seizures that typically arise from the frontal lobe and cause motor signs?

The condition described in the question is most accurately characterized by seizures arising from the frontal lobe, which often result in motor signs. Rolandic epilepsy, also known as benign rolandic epilepsy or benign childhood epilepsy with centrotemporal spikes, primarily affects children. It typically features seizures that can be focal and often involve the facial muscles, leading to movements or jerking in one side of the body. These seizures usually occur during sleep or upon awakening, further supporting the characterization of frontal lobe involvement and associated motor symptoms.

Other syndromes listed do not match this specific description. For instance, Lennox-Gastaut syndrome is a severe form of epilepsy that involves multiple seizure types, including tonic seizures, and is associated with cognitive impairment, but it is not specific to frontal lobe seizures. Juvenile myoclonic epilepsy includes myoclonic jerks and generalized tonic-clonic seizures but is not typically associated with frontal lobe seizure activity or isolated motor signs. Absence seizures are characterized by brief lapses in consciousness and primarily involve generalized brain activity, without the motor manifestations seen in the frontal lobe seizures.

Thus, Rolandic epilepsy is the correct answer as it aligns with the definition involving frontal lobe seizures that lead to motor signs.