Atlantis

Atlantis is an entirely new concept in EEG and biofeedback systems. It goes beyond the
current state-of-the-art, to define a new approach to high-quality and effective EEG and
peripheral feedback. It includes an innovative “Triamptm” bioamplifier that records and
reports the EEG signal, the DC and slow cortical potentials, and the impedances of the
sensors as well, continuously, and in real time. In addition to 4 (24-bit) EEG channels, there
are 4 (12-bit) Aux channels, also using Triamptm inputs, providing simultaneous AC, DC,
and impedance recording for skin, muscle, heart, temperature, and other peripheral
modalities. In addition, its built-in “autonomous” functions provide rapid (1024
events/second) real-time feedback for real-time photic, auditory, and vibrotactile
stimulation.

Atlantis is more than an EEG or biofeedback encoder. In incorporates powerful hardware and
software technology to provide an integrated system that performs autonomous real-time
EEG-controlled feedback without a PC, as well as providing real-time data for PC-based
software. The Atlantis is capable of recording and processing EEG in real-time (typical rate
1024 samples per second), and providing live feedback in the form of photic stimulation,
auditory feedback, and vibrotactile feedback, all operating at 1024 samples/second. This
provides rapid and accurate feedback for sensitive “desynchrony” or “inhibit-based”
protocols that depend on real-time EEG-controlled response. These response speeds are
not possible with PC-based software, owing to the delays inherence in PC and
Windows-based systems. Only a dedicated, real-time hardware solution (analog or digital)
can provide this type of guaranteed response and feedback.

Atlantis provides “total immersion”. By providing simultaneous real-time feedback in the
forms of photic stimulation, auditory stimulation, and vibrotactile stimulation, Atlantis
produces an immersive sensory experience that is comprehensive yet simple. In its
simplest form, the EEG signal is fed directly back to the trainee in the form of signals
encoded into the LED glasses, the speakers or headphones, and the vibrotactile cushion.
This feedback does not depend on specific protocols, and is more “analog” in nature than
conventional “discrete” training (e.g. PC-based) paradigms. Feedback can be used to
provide either reinforcement or inhibition of EEG or other biological rhythms via. direct
sensory feedback, based upon on the EEG connections used, and the details of the feedback
settings. Those who have experienced and appreciate the value of dedicated real-time
analog or digital feedback systems will understand the value of this approach, and see it as
an important component of a comprehensive neurofeedback capability.

In addition to its innovative autonomous functions, Atlantis incorporates continuous
real-time impedance monitoring (not impedance “checking”). All impedances on the EEG as
well as the Aux channels can be continuously monitored via, the front panel LED’s, or via.
PC-based software. The 4 EEG channels include built-in LED indicators showing the
impedance values continuously on the front-panel, throughout the training session. This is
vastly superior to impedance “checkers” that only monitor impedance when requested, and
which require data acquisition to stop during impedance checking. Atlantis provides
continuous monitoring of all EEG impedances, as well as the ability to send impedance data
back to the PC for feedback and intervention, when needed. This capability virtually
eliminates the need for a separate impedance-checking step, and ensures that all
impedances are within desired ranges, at all times during the feedback session.

The Atlantis system also includes direct-current (DC) and slow-cortical potential (SCP)
measurement, using our innovative Triamptm amplifier design. With this system, you will be
able to simultaneously and continuously measure, on each EEG channel, the EEG signal, the
impedances of both the active and reference leads, the DC potential, and the SCP potential,
all at the same time. This opens important new avenues for research and clinical work with
DC and SCP potentials, as well as with conventional (now wideband 0.0 – 120.0 Hz) EEG
signals.

Because the Atlantis EEG inputs are sampled with 24 bits at 1024 samples/second and
reconstructed for data transmission to the PC, the EEG channels can be used to monitor
EMG, EKG, or other “fast” signals without aliasing errors due to undersampling. When data
are transmitted at 256 samples per second, the operating bandwidth of the system
becomes 0.0-120.0 Hz. The ability to go cleanly and uniformly to 120 Hz provides new
possibilities in EEG as well as EMG and related signal training. Thus, useful high-resolution
biofeedback training can be done on muscle, heart, and other biological signals without loss
of accuracy. When faster signal training is required, the Atlantis can operate in its “native”
mode, and acquire and send data as fast as 8192 samples/second. Thus, research and
clinical training can be done with signals ranging in bandwidth from DC to 4096 Hz, in
selected modes.

EEG:

Number of EEG channels: 4

Amplifier type: BrainMaster Triamptm (simultaneous AC/DC/Impedance recording)

Inputs: Bipolar: Separate Active, Reference per channel, shared isolated ground

EEG A/D Resolution: 24 bits

EEG A/D Accuracy: 0.023 microvolts

EEG A/D Full Scale Range: +/- 190 microvolts

Typical EEG internal sampling/operating rate (4 channels): 1024 samples/second (with
continuous impedance monitoring)

Maximum EEG sampling rate ( 4 channels): 4096 samples/second (without continuous
impedance monitoring)

Maximum EEG sampling rate (1 channel): 8192 samples/second (without continuous
impedance monitoring)

Common-mode Rejection Rati > 120dB

Input Impedance: > 1000 GOhm

Input noise: < 0.5 microvolts

Typical Operating Bandwidth: 0.0 (DC) – 120.0 Hz typical (1024 samples/second internal,
256 samples/second sent to PC)

Maximum Operating Bandwidth (4 channels): DC – 2048 Hz. (4096 samples/second
internal, 4096 samples/second sent to PC)

Maximum Operating Bandwidth (1 channel): DC – 4096 Hz. (8192 samples/second internal,
8192 samples/second sent to PC)

Continuous sensor impedance monitoring for EEG:

Amplifier type: BrainMaster Triamptm (simultaneous AC/DC/Impedance recording)

Inputs: Single Ended: Single Active per channel, shared isolated ground

Resolution: 12 bits

Impedance range: 0 – 1 Megohm

Impedance accuracy: < 0.5 Kohm

Front panel indicators: tri-color LED’s indicating impedance via color and flash rate

Separate indicators for active and reference leads (total 8 indicators for 4 channels)

Impedance Indicator Levels: <5K, <10K, <20K, <50K, <100K

Impedance data may be continually sent to PC and monitored using BrainMaster 3.0 SW

Aux:

Number of Aux channels: 4

Aux A/D Resolution: 12 bits

Aux A/D Accuracy: 0.2 millivolts

Aux A/D Full Scale range: 0-2.5 volts

Aux Typical sampling rate: 1024 samples/second (with continuous impedance monitoring)

Aux Maximum sampling rate: 8192 samples/second (without continuous impedance
monitoring)

Aux impedance monitoring: 12-bit accuracy, range 10 Megohms

Internal Autonomous Functions:

Operating rate: 1024 samples/second

Modes: photic, vibrotactile, auditory feedback

Photic: direct real-time EEG-controlled photic stimulation via built-in controller

Auditory: direct real-time auditory feedback of EEG via. built-in controller

Vibrotactile: direct real-time tactile feedback of EEG via. built-in controller

NOW AVAILABLE CALL FOR DETAILS!! 440-232-6000

ATLANTIS 1 4x4 Including 2.5SE Software list price $2695 (less 15% discount)

ATLANTIS II 2x2 Including 2.5SE Software list price $1695 (less 15% discount)

email: workshop@eegvermont.com

Call 802-254-3305 to order Atlantis 2x2 or 4x4