Dr. Andrew Hill (Cognitive Neuroscience, UCLA) is the founder of Peak Brain Institute and a leading neurofeedback practitioner and biohacking coach for clients worldwide. At Peak Brain, Dr. Hill provides individualized training programs to help you optimize your brain across goals of stress, sleep, attention, brain fog, creativity, and athletic performance. Find Dr. Hill at: https://peakbraininstitute.com/ Email: drhill@peakbraininstitute.com Facebook: https://www.facebook.com/PeakBrainInstitute Instagram: https://www.instagram.com/peakbrainla/ LinkedIn: https://www.linkedin.com/in/andrewhillucla/ YouTube: https://www.youtube.com/drhill Find more about Brain Wellness at: https://brainwellnesssolutions.com/ Support the show with Buy me a Coffee: https://www.buymeacoffee.com/brainwellnessnp
Episode Summary
This piece is drawn from a conversation I had on the Brain Wellness NP podcast, where I got to geek out on the neuroscience of brain mapping and neurofeedback. You can watch the original conversation. What follows is my own account of how this work functions, what I learned getting a PhD to answer a question that bugged me, and what I want you to do with your own brain.
How did I end up doing neurofeedback for 25 years?
I spent about a decade in acute human service work before I touched an EEG. I managed group homes for people with multiple disabilities, often no language, no vision, significant cognitive deficits. Then I moved into acute inpatient psychiatric work, crisis cases across adult, geriatric, and pediatric populations. I have a rich, deep stack of suffering experience from that decade.
Then I got injured, the hospital closed, and I went into high-tech for a few years right before the year 2000 correction. When that slowed, I took a job at an autism center that used neurofeedback. I saw kids with autism, ADHD, anxiety, and seizures, and what I saw rearranged my sense of what was possible.
In the group homes I once spent an entire year teaching a man to use a fork. That was the accomplishment. Slow, tedious reinforcement learning. At the autism center I watched extremely dysregulated kids ratchet down their dysregulation in six to eight weeks, to the point where teachers were calling home to thank parents for whatever they had changed. Within a few weeks you saw behavioral change. Within a couple of months you saw measured change in assessment data.
The field was young and loud. EEG turns 100 this year. Clinical neurofeedback was discovered in the mid-1960s. Twenty-five years ago, three or four schools of thought were still fighting over how it worked, each one certain it had the answer, leaving long technical diatribes on Usenet. No matter which toolset a practitioner used, the effects beat anything I had seen across a decade of acute work. They had irreconcilable theories and they were all getting results. A blind-men-and-the-elephant situation. So I went back to grad school to figure out the actual mechanism.
How does the brain know it is being rewarded?
Neurofeedback is operant conditioning, exercise for brain waves. The strange part is that the behavior you are conditioning is involuntary. You cannot feel your brain waves, so your mind sits there thinking this is stupid until the effect kicks in, usually two or three sessions in.
Here is the classic example. A circuit on the right side of the brain supervises attention. It is involved with executive function, with sleep, with behavioral inhibition. It uses low-frequency beta, the sensorimotor rhythm, roughly 12 to 15 Hz, to sit still, stay relaxed, resist waking at night, and pump the brakes appropriately. In some people, theta, a release or lubrication frequency, runs high in that region and the beta runs relatively low. That combination produces disinhibition. These are people more driven by the outside world, hunters rather than gatherers, excellent at high-stimulus, high-intensity, high-conflict situations and less good at doing their taxes. A low supervisory state, high performance under intensity. Some of that profile reads as ADHD.
So you often want to train that sensorimotor rhythm up. It improves the brain's ability to sleep and sit still, reduces seizures, and triggers a plasticity surge that lasts about 24 hours. You place a sensor over the location, put on ear clips, and the computer measures the beta and theta moment to moment. When your brain briefly shifts in the right direction, the screen applauds with audio and a little gameplay. When it drifts back, the game slows or stops. The brain says I like stuff and then where's my stuff. Every few seconds we move the goalpost to sit just next to where your brain currently is, so we only reward movement in the right direction.
My question was simple and stubborn. How does the brain know those beeps are contingent on its own activity? Was it the attention you were being paid by your therapist? Did the location or the frequency matter, or was it pure exercise?
What I demonstrated in the lab
I designed an experiment to find the informational loop. I placed training sensors on C3 and C4, the left and right central strip locations, with a 64-channel cap on top. The left central circuit uses faster beta, 15 Hz and up, to stabilize vigilance and the depth of sleep. The right uses the slower sensorimotor rhythm to supervise and inhibit. These two circuits are big maintainers of sleep and executive function, conserved across many complaints and goals.
I set up four conditions. Reward on left-side beta, left-side SMR, right-side SMR, and sham, where the rewards came from stored EEG files with no time-locking to the person's own brain. Five days in a row, nobody in the room, signal quality monitored from next door. Then I embedded the reward event, the beep that fired when the brain spent half a second doing the right thing, into the ongoing 64-channel record as a series of events.
Within five minutes, if you were not in the sham condition, the brain began to burst in the frequency being rewarded, under the location being rewarded. Every beep produced a desynchronization, a surge in the trained band, called an event-related spectral perturbation. That surge happened under the electrode, much less on the opposite side, and not at all in the sham condition. In sham you still saw the auditory event, the beep registered, but no beta surge followed.
The side of the brain matters. Sham matters. The loop is real, it is local, and it shows up within minutes.
This solved a clinical puzzle that had bothered me for years. Why does it take 10 or 20 sessions to get good movement for some people? About one person in 50 sits down the first session and reports angels singing. Another one in 50 never feels a thing but a month later their sleep is great or their seizures are down. Most people are in the middle, noticing something faint by session two or three, doubting it, then catching it again. The brain starts learning within five minutes. It takes 10 sessions to build an effect large enough for the mind to participate.
What does QEEG brain mapping actually show?
QEEG is quantitative processing of an ordinary EEG, the same recording a sleep lab or epilepsy center collects, just seated upright for 20 minutes with no flashing lights. Brain mapping is a clinical tool, not a diagnostic one. ADHD is a behavioral set of characteristics that probably traces to two or three physiology resources cramped in particular ways. One diagnosis might map to four, ten, or an unbounded number of patterns in a brain.
Mapping is a process of sitting down with you and saying, look at this. Here is something plausible. People usually do not learn anything new about themselves from a brain map. They learn that the thing they already care about shows up like that, and that crystallizes their perspective. The patterns we read with some confidence are attention, stress, sleep, seizure and migraine stability, sensory processing, and speed of processing. Those are the low-hanging fruit. The map covers the cortical resources too, the default mode network, the salience network, laterality, language and visual areas. It is your brain, so it is a little hidden, but it is far less mysterious than people assume.
The most diagnostically valid signature was the theta/beta ratio for ADHD. Joel Lubar's work in the 1980s sorted thousands of pre-diagnosed people blindly into an ADHD bucket with around 94% accuracy, and inattentive presentations showed a high-alpha signature about 81% of the time. Better than most blood-range markers we rely on. As grad students repeated the work year after year, the effect weakened. The field's read is that sleep dysregulation crept into the adolescent population over a decade and washed out the sensitivity. High theta and high alpha while awake can be ADHD, and it can also be poor sleep regulation, and concussion can look the same. Physiology does not track diagnostic buckets cleanly, because people are weird. What is a problem for one person is unremarkable for another.
If you want the full walkthrough of the procedure, I cover it in the QEEG brain mapping guide and the broader logic in biohacking with EEG phenotypes.
Why I run contrast maps with caffeine, cannabis, and meds
To get a clean baseline I ask people to come in off caffeine since 4pm the day before, and off stimulants like Adderall for about 48 hours. People groan. So I offer a second map. Do one caffeinated. Do one on your Adderall, your cannabis, your pre-workout. I do not care what it is. If you rely on something, let's do an acute contrast map, because I can teach you about your brain faster when you can feel the difference live.
You already know how your Adderall feels. When I show you that it wakes you up and sharpens you but also makes you commit more errors, because it is treating your sleep debt rather than your ADHD, that lands. I have had teenagers tell me cannabis is the only thing that helps their anxiety while a parent wants proof it is harmful. We look at the brain and sometimes the data shows the kid is self-medicating appropriately, bringing down a real trauma signature alongside anxiety and migraine. That moves the conversation toward harm reduction rather than an abuse frame. I am not pro or anti any medication or intervention. The map gives you agency.
Medication change shows up in the EEG too. Andrew Leuchter, who chaired my dissertation committee and runs much of the placebo and frontline antidepressant research, demonstrated a measure called cordance, a ratio of absolute to relative power in the frontal lobe. Seven to 10 days after starting an SSRI the brain has shifted, well before you feel it, and that early shift predicts whether the antidepressant will work. For crisis medication management that is powerful. Change the meds, wait a week, read the EEG, get a sense of the direction the brain is being pushed. There are also phenotypes that predict whether stimulants will help you or whether you would do better asking your psychiatrist about something else.
For more on the anxiety circuitry, see biohacking anxiety and the neurofeedback for anxiety research.
Can a brain map see aging, concussion, and long COVID?
Yes, with reasonable confidence. As you age your alpha waves slow. If you are having word-finding trouble, a map can often distinguish ordinary alpha slowing, which dysregulated sleep can drive and which meditation and better sleep can speed back up, from something more concerning. I write about this slowdown in the alpha waves piece and the critical aging window.
Two to six months after COVID you can usually see neuroinflammatory signatures, and for most symptomatic people they read clearly. They look like concussions. COVID, chemo, mold, Lyme, and apnea tend to look alike on the EEG. You often do not need to know exactly which one it is. What matters is whether the person is still reintroducing the cause. You will not clear brain fog while sleeping under a moldy AC unit. Half of all brain injuries are silent for years before producing fog, slow processing, or even later seizures. If a regulatory system was knocked over by an illness or an injury, it can be shaped back. See biohacking brain fog for the detail.
Why is neurofeedback more like personal training than therapy?
I came into this with a neuroscience perspective rather than a psychology one. My PhD lab studied laterality. My mentor, Eran Zaidel, had been a student under Joseph Bogen and Roger Sperry, who ran the original split-brain surgeries for epilepsy. I tested attention in each hemisphere separately using tachistoscopic presentation, flashing information to one visual field while the subject fixed on the center and responding with one hand to constrain the task into a single hemisphere. I tested the original split-brain subjects, people in their 70s, 80s, and 90s, and learned how their brains worked.
That work showed me two separable attention systems that converge late to create the experience of attention, with a strong left-right division: left as the vigilance maintainer and stabilizer, right as the supervisor that steers and gently pumps the brakes. The field had been working mostly with an arousal model, activation versus anxiety, sleep, and fatigue. My laterality background plus my developmental experience produced a slightly different way of doing this work.
I am not hunting for your DSM label in a brain map. I am teaching you how your brain works. Once you know what you are working on, you can put your thumb on a resource and gently move it. How did that feel? Did we get goal-congruent movement? Mysterious, but not blind.
My line is that doctors are great but they have to be right, so you go to doctors for answers. You come to a scientist for questions, to dig through data and generate hypotheses. Then we move into a coaching role and iterate through interventions, then back to science for more assessment. Almost everyone else in this small field, about 5,000 practitioners in the US and 15,000 worldwide, are therapists. We run closer to a high-end gym model, sending equipment, coaches, and screens home so people do brain mapping and neurofeedback from their living room and own the transformation. The remote neurofeedback guide explains how that works.
What should you actually do?
The agency often matters more than the neurofeedback itself. I have had parents bring in a kid headed to college who cannot organize their way out of a paper bag. We map the brain, run a performance test, and I sit down and say, here are your strengths, here is what is hard to control, this part is awesome, you might want to steer it this way. Years later I get a call thanking me. The kid never came back for training. They needed to hear they were smart and capable despite the pattern, and they ran with a couple of strategies.
Start with a brain map. Get a QEEG. Make sure someone sits with you and walks you through it, including the raw data, where the blinks and coughs and teeth-grinding live, because EEG is noisy. Always pair it with an attention test, because data without framing tells you nothing. Learn to read the basic montages yourself, power, speed, connectivity. You are looking at how your brain is quirky, whether that quirk tracks something you care about, and what to change in your sleep, your meditation, your nutrition, or your training.
I draw on the SMR work for a lot of this, because training the sensorimotor rhythm improves both daytime focus and nighttime sleep through the same thalamocortical circuits that generate sleep spindles. You can read more in SMR neurofeedback and biohacking sleep.
Treat your brain the way you already treat your blood lipids, your deep sleep, your body fat. There is a concept in gerontology called the compression of morbidity. You want to push your aging and infirmity into the very last moments of life, running like a good sports car right up until it breaks down, rather than spending 30 years declining. Neurofeedback, exercise, watching your blood sugar, these flatten the trajectory. Start with the map.