Event Related Potential (ERP) is a small change in scalp recorded EEG time locked to the onset of an event such as a sensory stimulus or a motor act. ERPs are used clinically to assess sensory and motor function, and experimentally to investigate the neural correlates of a wide range of cognitive processes, such as those involved in attention, memory and language or behavioral processes like motor responses and volitional movements.  ERPs can also be used to assess the effects of stimulation and localize active brain regions.

Our Explorer family of Quest HD and  Quest HD + Stim product lines offer a universal platform for ERP and cognitive neuroscience research. Quest HD+Stim adds integrated stimulation capabilities for your experiments. These solutions are available from 32 to 256 channels of EEG and up to 64 additional peripheral channels. The modularity and scalability of our technology allows Hyperscanning (e.g., recording multiple subjects using a single EEG system with one clock), multimodal recordings (e.g., EEG, EMG, EKG) and the use of various electrode application methods, such as caps or nets using either gel or saline electrolyte.  The system configuration also provides  cost effective upgrade paths as your lab grows.

We have taken a novel approach of digitizing signals on head with our miniaturized active EEG and EEG+tES Front End design, thus providing ultimate signal quality while maintaining the robustness and durability of passive electrodes. Small enough to fit in the palm of your hand, Quest HD and Quest HD + Stim enable a variety of mobile, wearable HD EEG/ERP and cognitive neuroscience applications as well. To enhance the portability, the system includes an internal battery for up to two hours of recordings and up to six hours with the addition of the extended battery pack. Both the Quest platforms also support direct recordings to the internal HDD or data can be transmitted wirelessly or wired as needed by your application.

As ERPs are time locked to the stimuli, the EEG systems need to be equipped with trigger inputs in order to register these stimulus markers in the EEG data with millisecond precision. Our Quest HD and Quest HD + Stim provide industry leading 20 bits of Digital Inputs and 20 bits of Digital Outputs to enable a very powerful and flexible evoked potential recording set up while maintaining the simplicity and ease of use.

We can work with you to configure these systems to provide the exact tools you need for your research.  The form factor of the Quest systems, front ends and trigger input provides remarkable flexibility in a typical 2-room ERP laboratory to maximize data quality.  The Ripple Neuromed systems are designed to provide optimized data quality for your laboratory and your experimental set up.


  • Support from 32 to 512 channels
  • EEG, ERP, EMG, EKG and more
  • Analog and Digital IO
  • Python code on box support
  • Internal HDD, wired or wireless data acquisition
  • Battery operated
  • Hyperscanning
  • Transcranial Stimulation support (for Stim Front ends)
  • Matlab and Python APIs
  • LSL support for BCI applications

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