NEURO PRAX MR*

fMRI-compatible full-band DC-EEG biofeedback system

NEURO PRAX® MR systems measures physiological activity such as EEG, EMG, and EP signals simultaneously and synchronously for all channels. Unique amplifier technology captures EEG activities from infraslow (0 - 0.3 Hz) to ultrafast (80 - 1,200 Hz) frequencies.

The high dynamic range of our amplifiers and the integrated online correction of gradient and pulse artifacts make the NEURO PRAX® MR particularly suitable for measuring EEG, ECG, EMG, or GSR during functional Magnetic Resonance Imaging (fMRI).

The full-band MR-compatible DC-EEG provide a wide range of optional software-based functions such as online correction of artifacts, topographical analyses, spectral and amplitude mapping, and online averaging. The NEURO PRAX® MR 8 allows to record the galvanic skin response (GSR) and the EMG.

The NEURO PRAX® MR is a biofeedback device according to the FDA Regulation Number 882.5050. It supports researchers to learn to self-regulate their brain activity (EEG biofeedback). It is intended to be used for EEG biofeedback with the slow cortical potentials (SCP) protocol.

for biofeedback and for neurofeedback of the slow cortical potentials (SCPs) and frequencies
for measurements during magnetic resonance imaging (f)MRI
for measurements during simultaneous transcranial electrical stimulation with direct current (tDCS), alternating current (tACS) and random noise current (tRNS)
for measurements during simultaneous transcranial magnetic stimulation (TMS)

Features

Multi-modality recording with easy and straight-forward user interface
Records highest-quality signal, even with TMS, tDCS and fMRI in non-shielded rooms
Available from 32 to 256 channels, the portable system fits in a briefcase-sized carrying case
8 extra inputs on amps: 4 bipolar - EMG, EOG, EKG and 4 auxiliary input for GSR, nasal flow, pH sensor, temperature
Industry-leading input impedance (10^12 Ohm) and 24 bit resolution
Trigger input: 8-bits, TTL
Noise < 1.0 microVrms (at lowest sample rate) • CMRR > 90 dB
asalab is a TMS-compatible EEG system. MEG-compatible upgrade available
Options for high-density EMG grids, NIRS- , eye tracking- , and video-integration
Real-time data processing options

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
Research participant database, including experimental protocols and timelines, with comprehensive documentation.
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)

Areas of Application Technical Specifications Request for Demo

Areas of Application

Research in neurology: fMRI and full-band DC-EEG, fMRI and EP/EMG
Cognitive neuroscience and Behavioral science: fMRI and EP, fMRI and GSR, facial EMG
EEG biofeedback research: fMRI and DC-EEGfeedback, 3D EEG feedbackG