4×1 HD-tDCS / HD-tES Adaptor

The most economical and scalable solution for HD-tDCS / HD-tES.

The 4×1 HD-tDCS / HD-tES adaptor converts any 2-channel Soterix Medical tDCS stimulator into an HD-tDCS / tES device. The 4×1 HD-tES adaptor is not a stand-alone stimulator, and during stimulation does not generate any current. Rather, the 4×1 HD-tES adaptor intelligently divides and guides current generated by a 2-channel device, converting it to HD-tES (HD-tDCS, HD-tACS, HD-tRNS, HD-tPCS, HD-tODCS). The Soterix 4×1 HD-tES adaptor is thus an ideal solution where an existing 2-channel Soterix Medical device is already in use.

The Soterix 4×1 HD-tES adaptor is fully compatible with HD-tES accessories, and each 4×1 HD-tES adaptor comes with one connector cable to connect to the 2-channel or the 1×1 family of devices.

Product Features

Description

4×1 HD-tES
Industry Standard

Intelligently converts a conventional stimulator to 4×1 HD-tES. The most economical and scalable solution for HD-tES.
4X1 Montage: Most common HD deployment with option to select a center anode or center cathode.
Integration: Combine with any 1×1 device to obtain 4×1 stimulation. Leverage all the unique features of 1×1 device platform (TRUEcurrent, SMARTscan, RELAX, PRESTIM tickle).
4×1 + MRI: Soterix Medical 4×1 systems can be used in the fMRI/MRI using a unique 4×1-MRI kit. These complete kits provide an easy solution for full integration of our 4×1 stimulator with MRI/fMRI. The setup is rated to be compatible with any sequence in a 7T machine in Normal and First Level modes.
HD Software Compatible: Compatible with the revolutionary neurotargeting software:

Use HD-Targets to determine optimal electrode placement.
Use HD-Explore to explore potential 4×1 placements.

Technical Specifications

Electrical and Operating Characteristics:

Length: 7.91 in.
Width: 2.83 in.
Height: 5.9 in.
Weight (without batteries): 2.8 lb

Safety Features:

Touch proof safety connectors
ABS plastic encasing
Number coded connectors for safe and quick connections Low battery indicator
Bench top “easy read” design for simple operation

Power Source:

Batteries: 2, 9V Li-Ion (600 mAh) rechargeable batteries (removable)
Run time: ~ 5 hrs (depending on mode and polarity selection)

Scan Mode:

Output Current (to measure total voltage drop across each channel): nominally <22 µA ± 2 µA
Number of channels: 5
Range of measurement: Min: 0.05 units. Max: 19.99 units. Tolerance: 0.05 units.
‘SH’ indicates short-circuit condition.
‘OP’ indicates open-circuit condition Values less than ‘0.10’ are usually indicative of atypical low impedance condition.

Cables:

Input Cable: Shielded 2 channel
Connectors: Split Banana to 3 pin XLR type
Output Cable: Shielded 5 channel
Connectors: Circular 5 Pin Standard Din to Din-5 leads

Downloads

4×1 HD Adaptor Brochure

Applications:

HD-tDCS / HD-tES
High-Definition transcranial Direct Current Stimulation (HD-tDCS)
High-Definition transcranial Electrical Stimulation (HD-tES)

The 4×1 Concept

The 4×1 HD-tES adaptor interface is an accessory to an isolated 2-channel tDCS / tES stimulator and does not function as a stand-alone electrical stimulator or generator. The 4×1 HD-tES adaptor device is designed to be used as an interface device between an isolated 2-channel Soterix Medical current controlled tES stimulator and 5 stimulation leads; where 4 leads are connected to one output of the tES stimulator and the remaining lead is connected to the other output of the tES stimulator. The output leads connect to smaller high-definition (HD) electrodes, instead of the larger sponge electrodes used in conventional 2-channel tES. The device operates in two modes: SCAN and PASS mode. In PASS MODE, the 4×1 HD-tES adaptor does not modulate the waveform of the tES stimulator, and acts only as a passive current divider. In SCAN mode, the device uses exclusive HD electrode impedance mapping technology to ensure proper set-up prior to stimulation.