Measuring and Modulating Brain Activity The DC-STIMULATOR MR combines the DC-STIMULATOR PLUS and the use for application in fMRI scanners. The DC-STIMULATOR PLUS is a stimulator for use in scientific research. It provides a stimulation with weak currents, either direct or alternating, (transcranial Electrical Stimulation - tES), within non-invasive Interventional Neurophysiology. The electrical charge and current density applied through a constant current source are far below the threshold for releasing a stimulus. Depending on the duration, the used current, the current density, and the frequency the stimulation has a modular effect on existing neuronal elements by either activating or inhibiting cortical activity. The DC-STIMULATOR MR allows to apply tES during functional magnetic resonance imaging (fMRI) to localize the exact position of cortical activation. • highest patient safety standards due to multistage monitoring of the current path, automatic termination of the stimulation as well as continuous monitoring of the electrode impedance • intuitive menu navigation via display and four buttons • individual stetting and saving of the stimulation parameters • programmable treatment schedule and limited menu access* • study mode for double-blind active and sham stimulation* • signal output for online-correction of the EEG signal during tDCS or tACS/tRNS*

• stimulation mode "tDCS": continuous stimulation, adjustable, fade in and fade out • stimulation mode "Pulse": cyclic turning on/off of stimulation, adjustable pulse width and interval) • stimulation mode "Sinus": (bipolar sinus wave, offset, frequency, phase and oscillation period adjustable) • stimulation mode "Noise": normally distributed broadband, low- and high-frequency noise, offset and duration adjustable • study mode for "blind" operation of real and sham stimulation, encoded from a code list of 200 codes, independently adjustable settings (which can be saved in order to avoid accidental...