BIOPAC® Systems, Inc. Logo

277 – tDCS Transcranial Direct Stimulation Using STMISOLA

Transcranial Direct Current Stimulation (tDCS) is an electrical stimulation method, which employs a direct current of value typically between 1 and 2 milliamps (ma). This method is typically oriented to neuronal stimulation in the brain. Depending on the type of electrodes used for stimulation, and their associated placement on the scalp and body, Transcranial Direct Current Stimulation (tDCS) may also be referred to as High Definition Transcranial Direct Current Stimulation (HD-tDCS).

Upon first introduction tDCS employed the use of large surface area electrodes (25 cm2 – 64 cm2), and electrodes—either carbon composition or metal—were isolated from the skin surface with conductive gel soaked sponges, to help reduce ion transfer from electrodes into the skin and to reduce current density at the electrode sites. tDCS can also be employed with Ag/AgCl electrode arrays.

Using BIOPAC for tDCS and HD-tDCS…

This application note illustrates how a HD-tDCS setup can be constructed using the following BIOPAC equipment:

Sample tDCS Hardware and Setup

transcutaneous direct current stimulationBasic setup for stimulation only:

1 x MP160/HLT or MP150/UIM (Data acquisition system)
1 x STMISOLA (Isolated linear stimulator)
1 x CBLCFMA (Current feedback monitor)
1 x CBLLIMIT2 (Current Limiter 2 ma)
3 x CBL204 (Y–electrode lead coupler)
5 x LEAD110 (Electrode lead, unshielded)
1 pk. EL502 or EL504 (Solid gel electrodes)

If also recording biopotentals at the same time:

MP160 setup: add 1 x INISO (Analog signal isolator)

MP150 setup: add 1 x HLT100C (High-level transducer amp) + 1 x INISO (Analog signal isolator)

Connection guide: CBLCFMA – INISO – HLT100C

Associated Applications

Spotlight On
Ventilator Validation Kit

Ventilator Validation and Test Equipment

The Ventilator Validation Kit supports new prototype development, existing design validation for production testing, mobile field testing and verification, and other uses where accurate pressure and flow measurements are critical. The Ventilator Validation Kit provides ventilator manufacturers and prototype developers with a complete solution for validating new medical/hospital-grade ventilator products intended for human use. The VVK100-SYS includes […]

View All
Latest News

Researchers Respond | iSAVE: Rapidly deployable system to expand ventilator capacity

MIT and Harvard researchers developed a new technique to expand ventilator capacity Individualized System for Augmenting Ventilator Efficacy (iSAVE): A Rapidly deployable system to expand ventilator capacity “The iSAVE is a rapidly deployable solution in response to the urgent shortage of mechanical ventilators for respiratory support during the COVID-19 pandemic. In contrast to previously described […]

New Ventilator Validation Kit for Rapid Development & Field Testing

New Ventilator Validation System Allows Device Manufacturers to Test Ventilator Pressure and Volume System supports rapid development and testing of hardware for COVID-19 treatment Goleta, California – March 24, 2020 BIOPAC Systems, Inc. announced a new Ventilator Validation System for engineering and device manufacturers to use when designing and testing new and existing ventilators for […]

Read All
Request a Demonstration
Request a Demonstration