Overview of generalized epilepsy, including absence (petit mal), tonic-clonic (grand mal), myoclonic, and atonic seizures. Focus on absence and tonic-clonic seizures for detailed explanation.

Absence seizures are brief episodes of mental absence, common in childhood. Characterized by a pause in activity, eye blinking, and a return to the previous activity. Multiple attacks may occur daily. EEG shows a characteristic spike and wave pattern at 3 cycles per second. Best treated with ethosuximide, which reduces calcium influx in thalamic neurons.

Tonic-clonic seizures have phases: prodrome, aura, tonic, clonic, and postictal. The prodrome involves behavioral or mood abnormalities. The aura is perceived only by the patient (e.g., strange smells). Tonic phase involves loss of consciousness and body stiffening, potentially with cyanosis and a cry. Clonic phase involves muscle jerking, risk of tongue biting, and possible urinary/fecal incontinence. Postictal phase involves drowsiness and irritability. Do not leave the patient alone.

A brief mention of myoclonic seizures as a type of generalized epilepsy, where a single muscle or muscle group jerks, leading to a generalized response.