Abstract: The implantable monopolar electrode assembly includes a base support structure including a layer made of a nickel titanium alloy having a temperature memory. The method is directed to electro-stimulation of muscles and to a method of implanting a monopolar electrode assembly. The method includes the steps of: first performing an endoscopic approach to the nerves and then selective electro stimulation by performing a neurolysis on nerve trunks until a desired target nerve fascicle and associated muscle is located, followed by insertion of the monopolar electrode assembly adjacent the target nerve fascicle for subsequent connection to a neurposthesis system.