Fifteen years after a stroke left Cathy Hutchinson paralyzed, she discovered a surprising path to independence. Using nothing but her thoughts, she can now control a robotic arm to feed herself and perform everyday tasks, something that was once thought impossible (Image 1). This life-changing feat is made possible by brain-computer interfaces (BCIs), an upcoming technology that establishes a direct link between the brain and an external device (Orenstein, 2012).
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