BrainMaster Technologies, Inc. and Applied Neuroscience, Inc (ANI) are pleased to announce the availability of a new tool for use in EEG neurofeedback training, assessment, and related work. The Z-Score DLL* provides, in real time, a total of 72 realtime values for 2 channels and 248 realtime values for 4 channels, and 5700 realtime values for 19 channels computed on a continuous basis, by the ANI Z DLL software. These calculations are performed more than 30 times per second, and provide data useful for training, as well as for assessing the current condition of the trainee via their normative EEG scores on any of the components.
These consist of Z-Scores for the following estimators:
- Absolute Power (2, 4, or 19 channels, 10 bands)
- Relative Power (2, 4, or 19 channels, 10 bands)
- Power Ratios (2, 4, or 19 channels, 10 ratios)
- Amplitude Asymmetry (2, 4, or 19 channels, 10 bands)
- Coherence (2, 4, or 19 channels, 10 bands)
- Phase Difference (2, 4, or 19 channels, 10 bands)
Z-Scores provide an instantaneous measure of how the trainee’s EEG compares with a normal population. Scores are based upon the EEG signal, the sensor locations, the age of the trainee, and whether eyes are open or closed. With this information, the LZT Z-Score system is able to provide values of 0.0 (normal), positive (above normal) and negative (below normal) scores. A Z-Score of -1.0, for example, means the trainee is 1 standard deviation below normal for their population. So when a trainee sees an alpha level of 8.5, for example, and asks “What does it mean?” it is now possible to express this measurement in terms of comparison to the normative population. This makes it possible to construct protocols that are “aware” of how the trainee fits in, and how their EEG values compare with normative. This is of considerable value in amplitude and power measurements, but is even more essential for coherence, phase, and asymmetry scores.These Z-Scores provide, in real time, similar (and consistent) data as provided in a QEEG when a QEEG is used for normative statistics. The difference is that now these Z-Scores are available in real time, and are used in tandem with existing clinical neurofeedback software. It thus becomes possible to perform a mini-assessment of selected variables, during the training. Z-Scores can also be used to create feedback events such as sounds, games, BrainMaster’s Flash games, set inhibits or Z-Bars (available with Z-Plus™) artifact detection, or control other interfaces, events, or devices.
Z-Scores can be processed and used in an unlimited array of possible protocols. Once a Z-Score training protocol is set up for one trainee, It is automatically adapted to other trainees, by entering their age, eyes open/closed condition, and the sensor locations.