Saebo Launches New Biofeedback/Stim Device

I know this is commercialization but this is interesting.
 http://e2.ma/message/xosne/h0m6cc
This line is interesting.

What is the Patent Pending Reciprocal EMG

Triggered Stimulation (RETS) Program?

The RETS (Reciprocal EMG Triggered Stimulation) program is ideal for clients with increased tone that have difficulty relaxing the spastic muscles.  The biofeedback stimulation program involves both the agonist and antagonist muscles and is triggered upon relaxation of a muscle instead of activation.

Stimulation is triggered to the desired muscle group (i.e., finger extensors, elbow extensors, etc.) once the client relaxes the opposing hypertonic muscle group (i.e., spastic finger flexors, elbow flexors, etc).  Therefore, the emphasis is placed on relaxing the hypertonic muscles in order for stimulation to be triggered to the opposing weakened muscle group.

Is it even possible to willfully relax the tonic muscles? I'd love to see the research on that.