We're not going to rest until everybody and their mothers have learned about this revolutionary science and what it means for who we are as humans and how we take care of each other as a society.


We believe the science and technology of HEG are going to be essential for every clinic and education program dealing with brain health, for improving our stress management and resilience, and for honing our creative and competitive edge. We're putting our money where our mouth is by producing affordable tools, free software, and open source everything! Find us on Github!

Check out the academic resources at the bottom of this page!


Cutting-edge brain science with down-to-earth applications.

Hemoencephalography (HEG) is the measure of blood flow in the brain. It works by emitting two kinds of light, Red and near-Infrared, which pass through the skull, and get absorbed or reflected by blood and brain tissue. HEG devices detect the blood oxygen changes in the brain by analyzing the light that is reflected back. Heart rate monitors used in hospitals and fitness devices use same method, called Pulse oximetry, part of a wider field called Functional Near Infrared Spectroscopy (fNIRS).


The more blood being sent to particular regions of the brain, the more energy and activity in that region - the same as any other organ in the body. HEG devices create a live feed of the comings and goings of the mind, and users immediately recognize changes in their mental state by the information on screen.

Image result for blood vessel scan.webp


Until lately, there has been little discussion of brain blood flow training in the treatment of brain disorders or in developmental health. Your brain is more susceptible to different kinds of stress than any other part of your body, and it will inhibit or permanently damage circulation in key areas like the frontal cortex. This has lifelong impacts on our mental and physical health.


It turns out we can directly strengthen our brain's circulation and potentially reduce a wide array of symptoms with the assistance of an HEG device, along with healthy diet, exercise, and environment. This has massive implications for how we learn about and prevent or treat mental illness across the whole spectrum.

Heart Rate Variability and breathing training are already widespread mental health tools, this takes it a step further with the direct activation of your brain regions via stimulation of blood flow. It's completely non-invasive and self-controlled.


Hershel Toomim (Sc.D.) piloted the first near-Infrared HEG devices at the Biofeedback Institute of LA in the mid-late 90's. He held around 25 patents in RF and biofeedback technology before his passing. 

He and Bob Marsh developed the first working nIR HEG devices and produced several thousand for use by therapists and enthusiasts. Hershel and his wife Marjorie, along with Stephanie DuPoint and others, ran an in-patient clinic and lab in LA where they explored the potential of the hardware and different treatment methodologies.


They saw some of the worst cases after the end of state asylums and constantly sought better solutions for individuals to heal and live fuller lives.



Joshua Brewster

Founder, Lead Mad Scientist

Benjamin Hale

Co-Founder, Web Developer


1. Toomim, H, Marsh, R. “Biofeedback of human central nervous system activity using radiation
detection” 1996. USPTO <https://patents.google.com/patent/US5995857A/en>

2. Bentourkia et al. “Comparison of regional cerebral blood flow and glucose metabolism in the
normal brain: effect of aging.” 2000. PubMed. <https://www.ncbi.nlm.nih.gov/pubmed/11099707>

3. Dias et al. “Clinical efficacy of a new automated hemoencephalographic neurofeedback protocol”
2012. NCBI PubMed. <https://www.ncbi.nlm.nih.gov/pubmed/23156903>

4. Gomes et al. “Hemoencephalography self-regulation training and its impact on cognition: A study
with schizophrenia and healthy participants” 2017. NCBI PubMed.

5. Marzbani et al. “Neurofeedback: A Comprehensive Review on System Design and Clinical
Applications” 2016. NCBI PubMed. <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4892319/>

6. Rakic, Pasko. “Evolution of the neocortex: Perspective from developmental biology” 2009. NCBI
Pubmed. <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2913577/>

7. Galynker et al. 1998. “Hypofrontality and negative symptoms in major depressive disorder.” NCBI
PubMed <https://www.ncbi.nlm.nih.gov/pubmed/9544664>

8. United Nations. “UN health agency reports depression now 'leading cause of disability

worldwide'” Feb 2017. <https://news.un.org/en/story/2017/02/552062-un-health-agency-reports-

9. Sharma, Anup et al. “Non-Pharmacological Treatments for ADHD in Youth” 2016. NCBI
PubMed. <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4968082/>

10. PA. “Schizophrenics learn to silence the voices thanks to MRI scanner, game.” Feb 2018. The

Sydney Morning Herald. <https://www.smh.com.au/world/europe/schizophrenics-learn-to-silence-

11. Toomim, H., Johnson, R. “Anxiety, Anger, Depression, TBI and HEG” Nov 2009.

Futurehealth.org <https://www.futurehealth.org/articles/Anxiety-Anger-Depression-by-Hershel-

12. S, Yun et al. “Stimulation of entorhinal cortex-dentate gyrus circuitry is antidepressive” April
2018. NCBI PubMed. <https://www.ncbi.nlm.nih.gov/pubmed/29662202>

13. Dresier M et al. “Mnemonic Training Reshapes Brain Networks to Support Superior Memory”
Mar 2017. NCBI PubMed. <https://www.ncbi.nlm.nih.gov/pubmed/28279356>

14. “Mental Health By The Numbers” 2018. NAMI.org. <https://www.nami.org/learn-more/mental-

15. Lopez, S. “Pulse Oximeter Fundamentals and Design” Nov 2012. Freescale Semiconductor.

16. Toomim et al. “Intentional Increase of Cerebral Blood Oxygenation Using
Hemoencephalography (HEG): An Efficient Brain Exercise Therapy” 2005. Journal of Neurotherapy
Vol 8 Issue 3. <https://www.tandfonline.com/doi/abs/10.1300/J184v08n03_02>

17. Shoshev, M. “Hemoencephalography Neurofeedback - Mechanism of Action” 2017. Trakia
Journal of Sciences

18. Zivodar, I. et al. “Neurofeedback application in autistic spectrum disorders” Sept 2015.

19. Gagnon et al. “Improved recovery of the hemodynamic response in diffuse optical imaging using
short optode separations and state-space modeling” 2011. NeuroImage Issue 56.

20. Gagnon et al. “Short separation channel location impacts the performance of short channel
regression in NIRS” 2012. NeuroImage Issue 59.

21. Saager, R., Berger, A. “Direct characterization and removal of interfering absorption trends in
two-layer turbid media” Sept 2005. Journal of Optical Society of America Vol 22.

22. Saager, R., Berger, A. “Measurement of layer-like hemodynamic trends in scalp and cortex:
implications for physiological baseline suppression in functional near-infrared spectroscopy” 2008.
Journal of Biomedical Optics Issue 13.

23. “Functional near-infrared spectroscopy neuroimaging device to enter scene this year” March
2016. Korea Advanced Institute of Science and Technology.

24. Marengo Rodriguez, F. “Design and implementation of a low-cost near infrared spectroscopy
system” 2017. Self-published.

25. Muehlemann et al. “Wireless miniaturized in-vivo near infrared imaging” 2008. Optical Society
of America.

26. Scholkmann, F. et al. “A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology” NeuroImage 2013.

FDA Disclaimer. *These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. *Consult your physician before beginning any exercise program.

©2020 HEG Alpha by B&H Research.