Neuroscience Of Enlightenment

I sat down with the team at Acid for Squares (episode 53) to talk about something I watched happen up close: a friend who set out to reach the jhanas and got there fast enough that Harvard now wants to scan his brain. You can watch the original conversation. What follows is my read on what happened and why, from the neuroscience side.

What are the jhanas?

The jhanas are absorption states described in classical Buddhist practice. There are eight of them, and they map onto progressively deeper levels of meditative concentration. The early ones are bodily and pleasant. People report warmth spreading through the body in the first jhana. In the second, practitioners describe balls of light suffusing them. As you move past the fourth, the reports change character. People describe moments where ordinary consciousness ceases, or ecstatic states that read as religious experience.

These are consistent first-person reports across centuries and across people who never met each other. That consistency is what makes them worth studying. When the same phenomenology shows up reliably, you are looking at a brain state with a structure, not a one-off.

If you want the broader picture of what meditation does to brain structure and function, I cover that in the neuroscience of mindfulness training.

How did neurofeedback help reach these states?

My friend, who I will call VJ, came to me wanting the jhanas. His question was direct: could the brain be prepared for this?

We did not start with the absorption practice. We started with the obstacles. He ran a course of neurofeedback, and over that work two things shifted. He cleared out a lot of accumulated stress load, and he improved his executive function. Then we leaned hard into the meditation itself. Within a year he was producing absorption experiences. He took a jhana workshop series with experienced teachers, and their reaction was that he was acquiring the states unusually fast.

The order matters here. He trained the brain into a state where deep concentration became available, then practiced into it.

Why does clearing stress and executive function come first?

Sustained absorption requires a calm, alert brain that can hold attention without internal chatter pulling it off target. A dysregulated nervous system cannot do that. If your threat circuitry is running hot and your default mode network is generating a steady stream of self-referential thought, you spend the whole sit fighting yourself. Experienced meditators show reduced default mode network activity during practice (Brewer et al., 2011).

This is where the research points to neurofeedback doing its work. SMR training, in the 12 to 15 Hz sensorimotor rhythm, is associated with thalamocortical inhibition. That is the brain's filtering mechanism, the system that lets you stay calm and alert while screening out excess sensory and internal noise. SMR and meditation converge on the same target: relaxed alertness with reduced internal chatter. This is reasonably established in the neurofeedback literature, and it is consistent with what I see in the maps when someone trains it.

For an anxious or overactive brain, the cingulate circuits often refuse to quiet down enough for meditation to take hold in the first place. The research describes people who practice for years and never get past the noise. Neurofeedback gives the brain objective, real-time feedback about its own state, which is thought to let it find the calm-alert configuration that subjective effort alone could not reach. Once that state is accessible, the meditation gets traction. I wrote more about that interaction in neurofeedback for anxiety.

VJ's executive function work matters for the same reason. Holding an object of attention through deepening absorption is an act of sustained, voluntary control. Strengthen the front-end attention circuitry and you strengthen the platform the jhanas are built on.

What is the brain doing in absorption?

I want to be honest about evidence strength here. The mechanism for the early jhanas lines up with what we understand about meditation and neuroplasticity: regular practice is associated with thicker prefrontal regions that support emotional regulation (Lazar et al., 2005) and with quieter default mode network activity, the system that generates wandering, self-referential thought (Brewer et al., 2011). The deeper jhanas, where practitioners report consciousness ceasing or ecstatic states, are still poorly characterized. That is exactly why VJ's brain is interesting to a research group. He produced a large, fast change in his capacity to enter these states, and the question on the table is what specifically changed in his brain to allow it.

Treat the early-jhana mechanism as well-supported, the deep-jhana mechanism as open, and the neurofeedback-as-preparation piece as a mix of established physiology and observation. I have seen the pattern enough times to trust the direction. The deepest states are not yet mapped.

Can you train your brain toward meditative absorption?

You can train the platform. Most people who struggle with meditation are running a nervous system too dysregulated to access the state meditation depends on. Address the dysregulation and the practice tends to open up.

A reasonable sequence: lower the stress baseline and build attentional control first. Neurofeedback is one route; consistent SMR-style self-regulation and the breathing and sleep work I cover in biohacking sleep all push the same direction. Once calm-alert is reliably available, practice into it. If you are chasing depth, work with experienced teachers who can guide the phenomenology, the way VJ did. The neuroscience prepares the ground. The contemplative tradition still knows the territory better than the lab does.

If you want to understand what your own brain is doing before you start, a QEEG brain map shows where your stress, attention, and inhibitory rhythms actually sit, which tells you what to train first.

VJ's case is one person, and one person is a story, not a study. What makes it worth telling is that the change was large enough and fast enough that a serious research group wants to measure it. The working hypothesis is straightforward: prepare the brain's regulatory and attentional circuitry, and states that usually take decades become reachable sooner. Harvard will tell us how much of that holds up.