The neuroConn DC-STIMULATOR MR is an MRI-compatible transcranial electrical stimulation (tES) device. It is an extension of our DC-STIMULATOR PLUS stimulator and benefits from the complete range of tES modes of operation:
- tDCS – transcranial direct current stimulation
- tACS – transcranial alternating current stimulation
- tRNS – transcranial random noise stimulation
The DC-STIMULATOR MR is a microprocessor controlled constant current source. It meets the highest safety standards thanks to multistage monitoring of the current path using hardware and software. By continuously monitoring electrode impedance it can accurately maintain the user-defined current amplitude while also detecting if there is insufficient contact with the skin. It will automatically terminate stimulation to ensure subject safety.
tDCS uses weak electric currents over a period of several minutes to change the electrical charge in the nerve cell membranes and has a direct influence on neurotransmitter channels. This serves to strengthen or diminish the excitability of the brain cells.
When anodal tDCS (positive stimulation) is delivered this causes a depolarisation of the resting membrane potential, which in turn increases neuronal excitability and allows for more spontaneous cell firing. When cathodal tDCS (negative stimulation) is delivered, this causes a hyperpolarisation of the resting membrane potential, which in turn decreases neuron excitability due to the decreased spontaneous cell firing
An advantage of tDCS as a technique is its capacity to influence cortical change after the stimulation is ended; this is dependant on the length and intensity of stimulation. The effect of stimulation increases as the duration of stimulation or the strength of the current increases.
The DC-STIMULATOR MR, MRI-compatible tES device, is not a medical device according to MDD93/42 EEC. It is a device for neuroscientific research.