ENTERTAINMENT
05/02/2009 05:12 am ET | Updated May 25, 2011

Greg Grunberg: Epileptic Son 90% Better After Surgery

Puberty is a tough time for anybody. For Heroes star Greg Grunberg's son Jake, who has epilepsy, it presented its own unique challenges.

"Puberty screwed up levels of gauging whether his drugs were working or not. He was having more seizures," Grunberg tells PEOPLE. "Hundreds a day."

Luckily for Jake and his family, the 12-year-old was eligible for a brain surgery that turned out to be life-altering. "They removed the part of the brain that has the most epilepsy activity," Grunberg says of his son's operation. "Now Jake is only having a little tiny episode once every three weeks."

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