An apparatus is provided for treating obstructive sleep apnea. The apparatus has an external device containing a breathing sensor to sense activity associated with breathing of a subject, and also containing a control unit, coupled to the breathing sensor, for generating a signal in response to anatomical activity associated with breathing. The apparatus also has a sublingual implant, containing a receiver, electrodes and circuitry, which wirelessly receives a signal from the external device and applies current to a sublingual muscle site in response to the signal, in a plurality of successive periods of inspiration, even in the absence of a detection of apnea by the external device.
