People having a gelastic seizure (GS) sound like they are laughing or mumbling. This is an uncontrolled reaction caused by unusual electrical activity in the part of the brain that controls these actions. Gelastic seizures are named after the greek word for laughter, "gelastikos." GS often occurs in patients with hypothalamic hamartomas (HH). HH is a rare, non-cancerous brain tumor on the hypothalamus. Symptoms The most common sign of GS is the patient startling. Patients may also have a look of
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When Laughter Is a Seizure: Gelastic Seizures & Hypothalamic Hamartoma Sudden, inappropriate laughter in a child — with no emotional trigger — may not be joy. It could be a Gelastic seizure. These rare seizures are most commonly linked to a Hypothalamic hamartoma, a congenital lesion arising from the Hypothalamus near the third ventricle. MRI plays a key role in diagnosis. Early recognition is crucial — especially in children with drug-resistant seizures, behavioral changes, or precocious pubert
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