Best-Yet Mind-Controlled Robotic Arm: A 52-year-old paralyzed woman has controlled a robotic arm using her thoughts. The arm, developed by scientists at the University of Pittsburgh, has an unprecedented amount of fine motor control. The woman manipulates the arm via two sensors that are embedded in the motor cortex portion of her brain. After just two days of training, she was able to move the arm using her thoughts. After three months of use, the woman's task completion rate rose to 91.6 percent. The robotic arm's level of dexterity and coordination is impressive. The video demonstrates the arm successfully picking up a small cube of wood and tosses a ball from one cup to another.