The actor, who suffered a serious car crash in 2009 while competing as a professional race car driver, revealed the news of his memory loss in his rehearsal video for Dancing with the Stars on Monday.
Muniz said he has suffered at least nine concussions and a “fair amount of mini-strokes,” which he said might have resulted in his severe memory loss.
He said he can’t remember most of the things he’s experienced in his life, including the six years on the comedy Malcolm in the Middle.
“Truth is, I don’t remember much [of my time on Malcolm]” Muniz said. “It almost feels like it wasn’t me.”
“It makes me a little sad,” Muniz said on the show. “Things pop back into my mind [that] I should have remembered.”
“Over the past 10 years, my mom will bring up things like trips we went on or big events and they are new stories to me,” he admitted. “I don’t know what the cause of it is. It’s not something I looked into, I just thought it was how my brain is — so I thought it was normal. I didn’t know I should remember going to the Emmys when I was younger.”
He admitted that he hasn’t gone to doctors about his memory loss. “To be honest, I’ve never really talked about it.”
“I’m not a doctor person,” he added. “Every time I go to the doctors they just tell me I’m crazy.”
An interview with his former TV dad, Bryan Cranston, was also included. “Frankie was a TV star, then he became a race car driver, and a drummer in a rock band,” Cranston said. “I said to him once, ‘What are you going to be, an astronaut next? You are doing all the things professionally that everybody dreams about.’”
“I’ve gotten to do anything that I really wanted to do,” Muniz replied. “But the truth is, I don’t really remember much of that.”
Cranston said he told Muniz not to worry about what he can’t remember. “They are still [his] experiences,” Cranston said. “It will be my job, I will tell him, ‘remember this? Remember that on Malcolm?’ What a life for you.”
Muniz has been working with his girlfriend Paige Price to help with his memory loss. She writes down what they do together every day in a journal.
“She’s amazing,” he said. “She literally writes because I get sad at the thought of losing the memories. So she writes in a journal that I can look at every day and it’s really cool because it has amazing detail. She started doing that about a year ago and hopefully, she’ll continue. She’s awesome. She’s very supportive. I hope we have a lot more memories [together].”