Implantable devices are provided for stabilizing adjacent vertebrae and the lumbosacral region of a patient. The p-side electrode of the ridge-waveguide laser diode has a first conductor layer region and a second conductor layer region formed on the first conductor layer region. A spring may bias the arm away from the bars, and another spring may be engaged with the lever to bias and disengage the lever from the arm. A differential terminal 22b is connected to a branch line 37b which is provided in the main line close to the differential terminal 22b in the range from the intersection portion 39b to the end terminal. The outlet nozzle is adapted in size and shape to be inserted and held beneath a conventional upper torso garment worn by the rider whereby warmed air is drawn into the conduct from the area of heated air build-up by the air blower is discharged from the nozzle beneath the upper torso garment to warm the rider. The first and second difference regions include portions of the first and second files respectively.