From USA TODAY.

It is the fodder of science fiction plots: implanting a device into the human brain… the blockbuster franchise “The Matrix” comes to mind. Here in the real world, though, it’s actually happening. While tiny computers have been implanted into less than 100 brains so far, their impact has been life-changing. Brain-computer interfaces, or BCIs, have done everything from allowing increased mobility to helping with speech. Could these devices become more mainstream and help the disabled do even more in the future? Dr. Iahn Cajigas, a neurosurgeon at the University of Pennsylvania who has studied brain-computer interfaces and worked with patients using them, joins USA TODAY’s The Excerpt to share his insights.

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