According to an embodiment of a method for providing neural stimulation, activity is sensed, and neural stimulation is automatically controlled based on the sensed activity. A reset transistor and a transfer transistor are serially connected between a driving power source and an output of a PD. The height Yc of the phosphor layer 5c with respect to a rear support body 20 is higher than the heights Ya and Yb of the phosphor layers 5a and 5b with respect to the rear support member 20, and establishes the relationship Yc>Ya=Yb. When an inhibitory neuron receives inhibitory input, the inhibitory connection may be depressed. 5% by weight of free-radical generator in aqueous suspension to conversions of from 76 to 100%, adding a monomer mixture made from 70.