The NEURO PRAX® MR* is a full-band DC-EEG system, which is primarily intended for use in neuroscientific applications. The system measures physiological signals such as EEG, EMG and EP in the frequency range of 0 to 1,200 Hz simultaneously and synchronously for all channels. The unique amplifier technology captures EEG activities from infraslow (0 – 0.3 Hz) to ultrafast (80 – 1,200 Hz) frequencies.

The high amplifier dynamics and the integrated real-time correction of gradient artifacts and pulse artifacts make the NEURO PRAX® MR* system particularly suitable for measurement during magnetic resonance imaging (fMRI).

We can supply our high-performance full-band DC amplifiers with 8, 32 or 64 channels. The neuroConn software, specially tailored to the hardware, is intuitive, flexible and easy to use. There are a large number of software and hardware modules available, such as online correction of artifacts caused by muscle and eye movements, topographical analyses, spectral and amplitude mapping as well as online averaging.

NEURO PRAX® MR* Features

  • 32-channel full-band DC-EEG biofeedback system (8, 64 channels)*
  • Channel type (EEG, EMG, ECG) selectable via software
  • Non-referential storage of raw data
  • Online correction of gradient artifacts during fMRI by means of soft- and hardware synchronization**
  • Real time correction of pulse artifacts
  • Suitable for polygraphy and polysomnography
  • Simple and intuitive user interface
  • EEG mountings and event markers freely selectable
  • Patient database with medication and examination calendar, complete documentation of readings
  • Topographical analyses, spectral and amplitude mapping
  • Display of averaged evoked responses during fMRI-scans
  • Connection to external trigger sources
  • Module ACTIVE SYNC MR for high end gradient artefact correction
  • * optional ** hardware synchronisation optional

Options and system extensions

  • module to correct EEG artifacts
  • module for cognitive evoked potentials: CNV, CPTOX, P300, ERN, and BP (not inside MRI scanner)
  • feedback module system extension (additional monitor)
  • NEURO PRAX® examination license from other PC
  • module for online data access via Ethernet by TCP/IP
  • export module for exporting measured data into other formats
  • module for data access within MATLAB®/Simulink®, LabVIEW®, C/C++
  • optical Trigger Module system extension for external trigger input
  • Module for source localization of EEG and fMRIEEG data
  • rechargeable battery pack (not inside fMRI scanner)

NEURO PRAX® MR* corrects imaging artifacts during MRI-EEG.

Areas of Application

  • Recording and analysis of cortical and sub-cortical EEG activity
  • Investigation of functional connectivity between areas of the brain
  • fMRI and evoked potentials, fMRI and galvanic skin response, fMRI and facial EMG
  • Quantitative EEG analysis and cognitive evoked potentials during fMRI
  • fMRI and DC-EEG feedback investigations, 3D-EEG feedback


  • Brochure
  • Measuring and Modulating Brain Activity

Technical Data

  • 32 full-band DC-channels (64, 128 channels)*
  • input impedance > 10 G
  • 24-bit resolution per channel
  • selectable sampling rates of 60 to 4,000 sps
  • frequency range of 0 to 1,200 Hz @ 4,000 Hz sampling rate
  • common mode rejection rate (CMRR) > 90 dB @ 50 Hz
  • dynamic input range approx. ±175 mV
  • input noise < 0.9 μV (RMS) @ 0 - 110 Hz at 250 sps
  • max. power consumption 1.5 W
  • continuous operation time > 8 h
  • power supply via built-in rechargeable batteries
  • applied part BF
  • dimensions in mm: 290 x 130 x 200 (W x D x H)
  • weight: 4.2 kg (incl. batteries)
  • data transmission via optical fiber
  • electrode input box, incl. connector cable (32, 64 channels)
  • measurement of Galvanic Skin Response (GSR) during functional MRI***
  • * optional *** only available in NEURO PRAX® MR 8
  • 32 full-band DC-channels (64, 128 channels)*
  • powerfull Intel® Core Duo processor, min. 1 GB RAM, 500 GB hard disc
  • USB 2.0, ethernet interface (LAN), min. 15“ TFT color monitor, keyboard, mouse
  • operating system WINDOWS® 7 (and later)
  • operating voltage 100-240 V @ 60/50 Hz AC
  • dimensions in mm: 420 x 365 x 170 (W x D x H)
  • weight: 11.6 kg (incl. stand)

Items marked with* are investigational devices and for research use only. CAUTION - Investigational Device. Limited by Federal (or United States) law to investigational use.