When Ann Johnson had a rare brainstem stroke at age 30, she lost control of all of her muscles. One minute, she was playing volleyball with her friends. The next, she couldn’t move or speak.

Up until that moment, she’d been a talkative and outgoing person. She taught math and physical education, and coached volleyball and basketball at a high school in Saskatchewan, Canada. She’d just had a baby a year earlier with her new husband.

And the thing is, she still was that person. It's just that no one could tell. Because the connection between her brain and her body didn’t work anymore. She would try to speak, but her mouth wouldn’t move.

Eighteen years later, she finally heard her voice again.

It's thanks to researchers at UC Berkeley and UC San Francisco who are working to restore people’s ability to communicate using a brain-computer interface. The technology, the researchers say, has enormous potential to make the workforce and the world more accessible to people like Ann.

Listen to the episode and read the transcript on UC Berkeley News (news.berkeley.edu/podcasts). There, you can also watch a video about Ann and the research team.

Music by Blue Dot Sessions.

Photo by Noah Berger, 2023.

This year on Berkeley Voices, we’re exploring the theme of transformation. In eight episodes, we explore how transformation — of ideas, of research, of perspective — shows up in the work that happens every day at UC Berkeley. New episodes come out on the last Monday of each month, from October through May.

See all episodes of the series.

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