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EEG / ECG / EMG Systems

Advanced research requires the latest technology, so expect only the most advanced and unique solutions from us.  We have combed the globe to find the best solutions for a wide range of biosignal acquisition applications.  Need a system with more channels than typical, more bandwidth, more sensor options, faster application, higher signal quality, greater portability or some other distinguishing feature?  We have best-in-class solutions for just about any application imaginable.  Every solution we offer is research-grade, meaning it has a great deal of flexibility built-in, so to the degree possible, the capabilities of the device itself will never limit your research options.  We don't sell your standard run-of-the mill diagnostic EEG / EP / EMG / ECG systems.  Every biopotential measurement system we sell is designed and independently certified to be safe for use with human subjects, but not all of our products are FDA approved for diagnostic use.  If you will be engaged in medical diagnosis in addition to research, be sure to indicate if you require a device that is approved for diagnostic use.


Optical oximetry, and near infrared spectroscopy (NIRS) in particular, is a tool for assessment of the oxygenation status and hemodynamics of various organs, e.g. muscle and brain. All cells in all organs of the body have a constant but variable need for oxygen. However the body stores for oxygen are minimal. So a constant and adequate supply of oxygen to the tissues through the circulation is essential. Any interference with tissue oxygenation will lead very rapidly to irreversible damage. Near infrared spectroscopy, the technique on which the Oxymon and the PortaMon are based, relies mainly on two characteristics of human tissue. First, the relative transparency of tissue to light in the NIR range, and second, the oxygenation-dependent light absorbing characteristics of hemoglobin. By using a number of different wavelengths, the relative changes in hemoglobin concentration can be displayed continuously. Using this principle, it becomes possible to monitor:

  • Non-invasively
  • In the lab, or even in the field with the PortaMon
  • Continuously
  • Without the need for special infrastructure
  • Without specially trained personnel
  • Relatively inexpensively


Transcranial magnetic stimulation (TMS) is method for non-invasive stimulation of the brain in which a coil is placed near the head, inducing small electric currents in the region of the brain just under the coil. We offer highly flexible TMS stimulators designed for research, with or with out concurrent EEG.  TMS is generally used to stimulate centrally, but it can be used to stimulate peripherally as well. AREAS OF APPLICATION: Neuroscience:  • Brain mapping • Functional connectivity of the brain • Motor and sensory functions • Pain • Visual perception • Mental imagery. Psychiatry: • Depression • Anxiety disorders, panic disorder, and obsessive-compulsive disorder • Schizophrenia • Substance abuse and addiction • Posttraumatic stress disorder • Autism. Neurology:  • Pain • Rehabilitation of aphasia and motor disability after stroke • Amyotrophic lateral sclerosis • Multiple sclerosis • Epilepsy • Alzheimer's disease • Parkinson's disease • Brain death, coma, and other persistent vegetative states • Tinnitus. Urology:  • Incontinence.


Eye-tracking refers to a collection of technologies for sensing where a person is looking (termed "point of regard").  Eye-tracking is a popular measure in its own regard in research on reading, visual attention, marketing / advertising and psychiatric disorders such as schizophrenia.  We offer several types of eye-tracking solutions brought to you by SR Research Ltd and Cambridge Research Systems Ltd., including high frame rate systems up to 2000 frames/second, remote systems that do not require head fixation, high-precision systems for use inside the fMRI scanner and affordable systems for simple fixation monitoring in behavioral and ERP applications. System Integration We provide integration assistance with the EEG systems we sell.  If you are buying an eye-tracker for stand-alone use, let us know your application so we can help you settle on the best fit.  If you intend to use the eye-tracker with a system you already own that we sell or support, let us know the serial number of the unit.  If you want the eye-tracker to be provided as part of a complete laboratory configuration, knowing some details about your application will let us guide you to the most convenient and cost-effective solution. Other Ocular Monitoring Methods Not Considered Eye-Tracking Note that there are other ways of measuring eye movements that do not provide enough information to determine point of regard, but those are listed elsewhere in the site.  For example, electrooculogram (EOG) can be measured with any DC bioamplifier, and it is often used to detect large movements away from a fixation point, but it is not generally considered suitable for determining point-of-regard.  Similarly, the Jazz Vigilance Monitor for use with ActiveTwo monitors ocular motility within the head/socket but due to viscoelasticity, the signal is not suitable for determining point-of-regard.  Jazz provides a very high frame rate and high sensitivity, which make it useful for microsaccade detection.

Motion tracking

We offer a variety of solutions for capturing motion in experimental settings.  Review the options below to see which best suits your needs.

Signal analysis

We offer a wide range of signal analysis options, including software for EEG/ERP analysis, post-processing of ECG and EMG, electromagnetic source estimation, real-time analysis for display and real-time analysis for feedback/control in brain-computer interface applications.  We have a variety of software applications for analysis of pre-recorded EEG/ERP, EMG, MEG, ECG and other biosignals.  All of our software options are modular so you can license only parts of the software that you need to accomplish your research goals.  We provide industry leading software for real time analysis of biophysical recordings designed for use with specially engineered data acquisition devices, so be careful to consider this in your decision making process.

MRI analysis

We offer a program which contains everything you need for the advanced analysis and visualization of structural and functional magnetic resonance imaging (MRI) data and for EEG / MEG distributed source imaging. Cortech has the software, licensing, and hardlock to provide analysis of MRI data, using BrainVoyager.

Electrode localization

You have only one opportunity -- make the most of it!  You took the time to position the electrodes accurately, so it should be worth the time to measure their locations with respect to surface landmarks to enhance future signal analysis options.  3D locations of electrodes can be used in co-registration of surface measured physiological signals with anatomical MRI, CT and other imaging modalities in software applications such as EMSE Suite and others.  The Locator software interfaces directly with the either of the 3D digitizers below to make electrode localization a quick and easy process.  Quick and accurate measurement of 3D electrode positions adds only 3-5 minutes to a typical study, but it ensures precision when coregistering surface measurements with anatomical images.

Stimulus delivery

Cortech offers software and hardware for experimental control and behavioral response measurement.  Flexibility is the most requested feature in stimulus delivery and response measurement apparatus.  We’ve selected software programs and devices that can be computer driven for the ultimate in flexible stimulus delivery.  Each of these tools can be interfaced with any of our acquisition systems for measurement of EP’s and ERP’s or they can be used by themselves for behavioral testing. We offer experimental control and stimulus delivery solutions suitable for users at both expert and beginner levels.  We also offer hardware for auditory and somatosensory stimulus delivery, constant current, constant voltage electrical stimulation, and multimodal stimulus control as well as devices for measuring and marking visual and auditory event timing.

Response devices

We offer both manual and vocal response devices that are flexible, accurate, and easy to use.  Whether you need an accurate reaction time measure, a participant response in a behavioral paradigm, or a control input that determines the direction the rest of the experiment will take, we have a solution.  We offer manual response devices intended for use in ERP and behavioral testing applications and voice response devices designed specifically for experiments requiring a vocal response.  We also supply response boxes from Cambridge Research Systems for use in ERP and Behavioral situations and a fibre-optic response system for use in MEG and fMRI made by Current Designs.

Electrodes, head caps, sensors

Electrodes, head-caps and sensors are designed to interface to almost any bioamplifier system, to the degree that the system conforms to some standard interface parameters.  If you are looking for head caps, active electrodes, passive electrodes or other types of sensors that can be used with an existing system, chances are you are in the right place.  Sensors that are designed only for use with a given acquisition system are listed as accessories under that system and are not duplicated here.

Consumable supplies

We offer competitive prices on consumable supplies for all of the products we sell, including electrolyte gel / paste, double-sided adhesive rings, syringes, blunt dispenser tips, tape, and more.  Everything we ship includes a reorder label for your convenience in restocking.  If you need something you do not find here, let us know, and we may be able to add it to the list of items we keep in stock for your convenience.

Tools and utilities

We offer a variety of general purpose instruments that can save hours around the laboratory for testing and troubleshooting.  For the most part, these utilities are for general purpose use, and they can be used with a variety of brands of lab equipment.

Computers and audio/video

Let us provide computers, video monitoring and audio communication and stimulus presentation hardware to make your life easier.   You'll save time and aggravation by letting us figure out all of the required ports, connector and cable types, cable lengths, channel assignments and other details for you.