Ethosuximide is first-line treatment for which seizure type?

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Multiple Choice

Ethosuximide is first-line treatment for which seizure type?

Explanation:
Absence seizures are driven by abnormal thalamocortical oscillations, reflected as 3 Hz spike-and-wave discharges on EEG. Ethosuximide works by blocking low-threshold T-type calcium channels in thalamic neurons, which blunts these rhythmic oscillations and prevents the brief lapses in awareness that define absence seizures. This mechanism makes ethosuximide the preferred first-line treatment for absence seizures. It isn’t reliably effective for tonic-clonic seizures, and it’s not the drug of choice for myoclonic or atonic seizures, which involve different neural networks and patterns of activity.

Absence seizures are driven by abnormal thalamocortical oscillations, reflected as 3 Hz spike-and-wave discharges on EEG. Ethosuximide works by blocking low-threshold T-type calcium channels in thalamic neurons, which blunts these rhythmic oscillations and prevents the brief lapses in awareness that define absence seizures. This mechanism makes ethosuximide the preferred first-line treatment for absence seizures. It isn’t reliably effective for tonic-clonic seizures, and it’s not the drug of choice for myoclonic or atonic seizures, which involve different neural networks and patterns of activity.

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