Team Describes Technology that Lets Spinal Cord-Injured Man Control Robot Arm
  with Thoughts 
From: Medical Design Technology - 02/08/2013

Researchers at the University of Pittsburgh School of Medicine and UPMC
describe in PLoS ONE how an electrode array sitting on top of the brain
enabled a 30-year-old paralyzed man to control the movement of a character on
a computer screen in three dimensions with just his thoughts. It also enabled
him to move a robot arm to touch a friend's hand for the first time in the
seven years since he was injured in a motorcycle accident. 

Read the entire article at:
http://www.mdtmag.com/news/2013/02/pitt/upmc-team-describes-technology-lets-spinal-cord-injured-man-control-robot-arm-thoughts

Links:
Man with Spinal Cord Injury Uses Brain Computer Interface to Move Prosthetic
  Arm with His Thoughts 
http://www.upmc.com/media/newsreleases/2011/pages/bci-press-release.aspx

Tim Hemmes Moves Robotic Arm with His Mind
http://www.huffingtonpost.com/2011/10/26/tim-hemmes-robotic-arm-mind-powered_n_1033072.html

An Electrocorticographic Brain Interface in an Individual with Tetraplegia
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0055344

Related:
Reach and grasp by people with tetraplegia using a neurally controlled robotic arm
http://www.nature.com/nature/journal/v485/n7398/full/nature11076.html