Each channel can deliver either positive or negative Alternating Current (tACS), Pulse Current (tPCS), Random Noise (tRNS), Oscillating Direct Current (tODCS) in addition to Direct Current (tDCS) while the common reference channel balances the residual current to ensure current conservation.
All M×N systems are HD-Targets and HD-Explore enabled allowing investigators to leverage automatic and manual dose optimization. Combine M×N with Soterix Medical Custom modeling for individually optimized treatment.
Leveraging exclusive Soterix Medical HD-electrodes, the M×N system can be configured for effective DC stimulation without sensation in most subjects. Study design benefits from the first full sensation matched sham protocols. Adapt stimulation for susceptible populations and individualize treatment for efficacy and safety.
Target any cortical region with unprecedented focality in a non-invasive system. The 4x1 montage is just the beginning with MxN Stimulator and Neurotargeting software
Maximize current to any deep brain regions. HDexplore and HDtargets allow you to design and evaluate stimulation strategies.
Precision and flexibility derives from the number of stimulation channels and the ability to position those changes anywhere on the scalp (not just limited to EEG 10-10).
MxN systems are designed in fully independent 5-channel and 9-channel modules that can be operated independently or stacked. Users can therefore develop modular systems that be expanded up to 82 independent channels for maximum flexibility in current guidance. 5-channel systems (which include a fifth reference channel) provide industry standard HD-tES for deployments such as 4x1 and 2x2. The 9-channel system can be further optimized for multiple targets. Stack systems together to provide modular increase in targeting up to eight 9-channel systems (or 16 5-channel systems). Modular design means you can always expand on existing systems or divide stacked systems.
Soterix Medical recommends EASYcarts for portable and safe storage of single module systems with full accessories. Soterix Medical recommends HD-Carts for stacked systems.
Why a “return” channel? Several essential reasons. First, the total current from all channels must equal zero – the return channel automatically carries the inverse of the sum of all other channels. Second, only by using a reference channel can the Neurotargeting software be used to rationally optimize current flow. Without Neurotargeting software, optimization of current at each electrode is complex. Finally, the reference channel facilitates stacking – during stacking the reference channel is shared across systems ensuring safety.
Examples of basic stacking configurations
Stand-alone M×N-5 and M×N-9 modules are powerful base systems for HD-tES allowing independent control of 5 and 9 channels respectively. Add additional channel modules as needed to these popular base systems.
Basic stack of two MxN-9’s allowing for control on 17 independent channels. One channel is shared to ensure safety and performance*. The stack can also be separated and the systems used independently.
Soterix Medical design means advanced features and flexibility does not mean complex controls or programming. The MxN line has interfaces built on the Soterix Medical OpenPanel design philosophy. All control and displays are visible on the back-lit front panel including real-time TrueCurrent monitoring for each channel. No hidden drop down menus which can lead to programming errors. No need to connect to a remote computer which is subject to sudden losses in wireless connectivity. The MxN system is designed from the ground-up to meet Soterix Medical exacting standards for medical device technology. The difference between copy-cat system is obvious.
Learn more open OpenPanel design.