Biofeedback & Neurofeedback Products

Hemoencephalography (HEG) Designs

*** THIS PRODUCT HAS BEEN WITHDRAWN FROM SALE. ***

A set of 9 designs developed and tested using a Pocket Neurobics Pendant (nIR).

Design features

• Dual screen designs (therapist and client) included.
• Automatic calculation of baseline and gain over baseline.
• Use of training periods: a button begins a timed period of training, at the end of which the client's feedback is switched off, allowing rest, but the trainer can continue to monitor the signal, change thresholds etc. The length of training period can be easily changed. At the end of the session the overall pattern can be clearly visualised - see trend below. The gain over each training period is calculated.

Graphical Feedback Features

• 60 S trend displaying rate of change
• 
• long term trend (15 min), showing training periods (green blocks in lower graph)
• 
• oscilloscope

Audio Feedback Features

• Tone feedback via pitch (with button control)
• Auto-recalibrate feature: when pitch drifts out of range, it automatically resets to the middle of the pitch range
• Sensitivity can be easily adjusted
• Rate of change feedback via volume - sound goes quiet when the signal is stable/unchanging (with button control)

Video Feedback

Forward motion of the video is produced by increases in the HEG signal. Motion is controlled - speed increases in proportion to the rate of change of the signal (up to a maximum which is not too fast). When the HEG signal decreases, the video remains still, or there is an option to allow backward movement (button controlled). There is related audio feedback.

Reading Design: this uses text converted to video format. Buttons are used to page forward and back (progressing through frames of the video). When the HEG signal drops, the text fades out to a white background. The trainee must increase the signal to resume reading - in other words task based training.

DVD Feedback

Again feedback is controlled by the rate of change of the HEG signal - this time as negative feedback. When the HEG signal decrease, picture and sound quality is degraded. The trainee must increase the signal again to recover the picture.

Sample Screenshots

Click on the thumbnail to see the full-scale image.

	1. HEG Design The uppermost trend shows the rate of change of the HEG signal, which is shown in the middle oscilloscope. The lower trend shows longer term progress, with training periods marked as green blocks.
	2. HEG DVD Design Two thresholds, each having a different averaging period, control aspects of the DVD image. The long term trend (bottom) shows the effects of two training peiods (green blocks).

For further information see the User Guide for the HEG designs. This can be downloaded for free. Visit the downloads page by clicking the link in the navigation menu.