Compatibility
- Set up in less than 10 minutes
- Comfortable and nonintrusive—low profile fits comfortably under headgear
- Data quality monitoring and feedback simplifies acquisition for non-technical personnel
- Cognitive state classification for engagement, confusion/distraction, drowsiness, workload and stress measured by HR metrics
- Patented real-time artifact decontamination
 EEG Sites | Standard Signals
Optional signals
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This system includes the B-Alert Cognitive State software with proprietary metrics for real-time monitoring of subject fatigue, stress (via HR metrics), confusion, engagement and workload (classify data from B-Alert Wireless EEG systems). Stress is monitored through Heart Rate (HR), Heart Rate variability (HRV), and LF/HF ratio. HR increases are associated with arousal; HRV is used to indicate healthy vs. unhealthy cardio responses during stress and the ratio is the measure of the balance of sympathetic vs parasympathetic activation. These measures are all related to stress and responses to stressful situations.
The GUI intuitively represents both the raw and processed data for easy understanding by even the untrained user. Each X-series headset requires its own computer, and a max of six (6) headsets can be used in the same room without cross-talk issues, provided that there’s one Bluetooth receiver for each headset.
To facilitate both real-time and offline analysis, the B-Alert gauges are fully customizable to fit the requirements of the user. In the standard format (shown below), the easy-to-read dashboard gauges (top left) and time series (bottom) windows present B-Alert’s highly validated second by second metrics: Engagement, Workload and Drowsiness (along with Heart Rate). Heat maps (top right) display EEG power spectral densities (PSD) in both spatial and temporal maps for the traditional Hz bands (Beta, Alpha, Theta, Sigma).
B-Alert Wireless EEG bio-metrics are normalized to an individual subject using 5-minutes of baseline data from three distinct tasks with the sleep onset class predicted from the baseline PSD values. A probability-of-fit is then generated for each of the four classes for each epoch with the sum of the probabilities across the four classes equaling 1.0 (e.g., 0.45 high engagement, 0.30 low engagement, 0.20 distraction and 0.05 sleep onset). Cognitive State for a given second represents the class with the greatest probability. B-Alert cognitive state metrics are derived for each one-second epoch using 1 Hz power spectra densities (PSD) bins from differential sites FzPO and CzPO in a four-class quadratic discriminant function analysis (DFA) that is fitted to the individual’s unique EEG patterns. The table below identifies and briefly describes each baseline task, and associates the task with the B-Alert classification.
Click below for B-Alert system details
• Cognitive State Analysis Software details
• B-Alert Published Studies: Citations—includes multi-subject and synchronized studies
• B-Alert peer-reviewed metrics validation: Johnson, R.R., et al., Drowsiness/alertness algorithm development and validation using synchronized EEG and cognitive performance to individualize a generalized model. Biol. Psychol. (2011), doi: 10.1016/j.biopsycho.2011.03.003.
Watch Tutorial Screencasts now to learn more about BIOPAC hardware, data acquisition, and analysis automation.B-Alert Systems include AcqKnowledge Acquisition & Analysis Software
AcqKnowledge is an intuitive, interactive program that lets you instantly view, measure, transform, and analyze data. Perform complex data acquisition, stimulation, triggering, and automated analysis routines using simple pull-down menus and dialogs—no need to learn a programming language or new protocol. Online analysis settings, filters, and transformations provide real-time feedback, or you can choose from a wide variety of off-line analysis tools. Multiple display options are available during and after acquisition—just click on an icon to flip between Chart, Scope, X/Y, Overlapped segments, Histogram, or FFT. The software also includes quality presentation capabilities.
- AcqKnowledge – click for software overview
- AcqKnowledge Features & Enhancements
- Linked acquisitions
- Focus Areas
- Data Integration
- Noldus Observer XT import/export
- SMI BeGaze import/export
- Animal ECG Boundary Detection
- Pressure-Volume Loop Analysis – additional lcense required
- User Interface Enhancements
- Tabbed graph interface
- Textual Value Toolbar on Graph Window
- Selection Palette Button and Enhancements
- Window Size Preference
- Configure Number of Horizontal Measurements
- Remove Text Annotations from Single Channel
- Journal Dock Location Option
- Linked Selections
- Autoscale single or multiple channels
- Pin window to top
- Presets for Rate, Measurements, and Expressions
- Channel Specific Grids
- Multi-Channel Simultaneous EEG Analysis
- Find Cycle Improvements
- Media Capture – high frame rate camera support
- Consolidated Hardware Support – MP150, MP36R, B-Alert
- B-Alert Wireless EEG Enhancements
- ICG Analysis Improvements
- Licensed feature systems or add-ons for BIOPAC Basic Scripting, Pressure-Volume Loop analysis, Network Data Transfer, and Remote Monitoring
