Which seizure type is characterized by sudden loss of muscle tone that can cause falls?

• A. Myoclonic
• B. Absence
• C. Atonic
• D. Generalized

Answer: (C)

Sudden loss of muscle tone that leads to falls is the hallmark of an atonic seizure (also called a drop attack). In these events, the muscles suddenly go limp, causing the person to collapse or slump to the ground, often lasting only a few seconds. This is different from myoclonic seizures, where brief muscle jerks occur without a loss of tone that would cause a fall. Absence seizures involve brief lapses of consciousness with a blank stare and typically don’t result in falls. Generalized seizures involve widespread convulsive activity with loss of consciousness and bodily stiffening and jerking, not just a sudden drop in tone.