Disconnection

Disconnection of EZ is a surgical procedure based on the concept that interrupting the epileptic discharge-spreading pathway, by isolating the primary epileptogenic zone, would have the same effect as removing the focus. This type of surgery should be preferred in cases of large EZs, especially when multilobar in order to avoid major post-operative displacement surrounding brain structures. Hemispherotomy is the complete disconnection of a cerebral hemisphere. A particular type of disconnection has been successfully proposed by Delalande for treating hypothalamic hamartomas in case of gelastic seizures.