Apparatus (1) for the timely stimulation of nerve endings located in the region of the ears that lead to the brainstem nuclei, so that the apparatus (1) has a battery-powered treatment current (3), the which is arranged in a housing (4) to be carried in the area of the ear and which is provided with an electronic circuit (10, 12) that generates a low frequency treatment current and said apparatus (1) has at least two flexible cables (5a, 5b, 5c) that start from the treatment current generator (3) for the respective connection to a needle stimulation electrode (6a, 6b, 6c) to be positioned in a nerve termination, in the that the treatment current generator (3) has several output channels (9a, 9b, 9c) that operate in analogy, and each of these output channels is associated with its own stimulation electrode (6a, 6b, 6c) , and for the control of the current These treatment channels that operate in analogue form are connected separately to a microcomputer circuit (10) on the input side, in which the values of the parameters of the treatment currents provided for the respective treatment can be stored in a memory (11) for continuous reading, characterized in that in the microcomputer circuit (10) an adaptive current control circuit (22) is provided which can be selectively activated by external drive, which is operatively connected to a internal memory (11) for processing current parameters and through a digital-analog converter (12) that is connected to a digital port (13) of the microcomputer circuit (10), supplies at least one amplifier (15a, 15b , 15c) provided on an output channel (9a, 9b, 9c) and designed for bipolar output signals, a control signal that causes the output circuit of this ampl ifier (15a, 15b, 15c) connected to a stimulation electrode (6a, 6b, 6c) a behavior of the current intensity and the stimulation voltage that follows adaptively to the value of the resistance present in each case in This output circuit according to the relationships: ** Formula
