Gelastic

Gelastic is a term used to refer to a certain type of epilepsyor epileptic seizure. The seizures of gelastic epilepsy are characterized by spells of involuntary laughter. The laughter has been described as "creepy" (Chong, 2003) and "without true mirth" (Fisch, 1991).

Gelastic epilepsy often results from a developmental abnormality of the brain known as hypothalamic hamartoma.

References

• ILAE Glossary of Descriptive Terminology for Ictal Semiology, Epilepsia, 2001.

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It uses material from the http://en.wikipedia.org/wiki/Gelastic Wikipedia article Gelastic.