Doctors have implanted elctrodes in Chris Reeve's diaphragm in an experimetn designed to enable the (partially) paralyzed actor to breathe on his own, hospital officials said Thursday.Reeve and Drs. Raymond Onders and Anthony DiMarco planned to talk about the procedure later Thursday at University Hospitals, hospital spokesman Eric Sandstrom said.The results of the operation are promising, Onders told the New York Times.The newspaper said Onder performed the surgery at University Hospital of Cleveland.Nursing supervisor Nancy Funk would not confirm early Thursday that Reeve had recieved treatment at the hospital.