Can I record high-density sEMG with the ActiveTwo system?

High density surface EMG as described in the recent publications on the Biosemi site is possible with the addition of the sEMG accessories. The original model of the high density sEMG probe was made for ActiveOne, so the connector differed. The current version separates the electrode grid from the preamp as in: reusable grid sEMG preamplifier…

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Can I install ActiView on a Windows 10 computer?

You CAN install current versions of ActiView on Windows 10. But, before you do so, if the system was orignally delivered before January of 2017 you should update the firmware on the optical receiver / USB interface so that you do not have to go through the very long and arduous process of installing an…

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Where can I find the coordinates of the 128 channel caps based on the 5% system defined by Oostenveld and Praamstra?

The positions in these caps come from the Oostenveld and Praamstra 5% system.  See http://robertoostenveld.nl/electrode/ for background and for links to electrode coordinates in a variety of formats. Depending on what software you are using for analysis, we might be able to provide another file format. The Biosemi channel assignments (relating electrode labels to electrode sites in…

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What are the computer requirements for ActiveTwo?

ActiveTwo is provided with drivers and host data acquisition software for Windows and Mac computers, and drivers also exist for Linux. Note that certain applications, such as event-related potentials, often require a separate computer to run experimental control / stimulus delivery software. In brief, the computer requirements for the ActiView data acquisition software are: Operating…

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How do I perform the one-bucket test to identify faulty electrodes? Or, why does the blue CM in Range flicker and the signals pulsate once every half second?

The blue CM in Range light reflects two things: 1) whether the CMS and DRL electrodes are adequately connected to the participant’s body, and 2) whether all of the other active electrodes, cables and connectors are intact.  If any of these are NOT true, then the blue CM in Range light will flicker and the…

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Is every TMS system EEG compatible?

Maybe.  There is no way the EEG system can harm the TMS system, but there are some TMS systems that are essentially useless with some EEG systems.  You need a a suitable combination of features in each to be successful at all in using TMS with EEG. Desirable attributes: Coils designed specifically for use with…

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Can I ship multiple work orders in one box?

If you have more than one item to be repaired, we will normally issue a separate work order number for each item.  In that case, it is not necessary to ship the items to us separately.  They can be packed together, assuming you pack carefully and include the documentation we request when we send you…

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What size adhesive washer do I need?

The inside diameter of adhesive ring should be about the same size as, or larger than, the diameter of the electrode contact.  The inside diameter of the adhesive ring should not be larger than the outer diameter of the electrode housing.  The outside diameter minus the center hole determines how much surface area contacts the…

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