Free will, neurons, and responsibility: a neurologist's view

A path in a forest splitting into two directions

Do we actually choose anything? It sounds like a philosopher's question, but I meet it in the clinic constantly — and neuroscience has made it sharper, not simpler.

The famous experiments are real. Decades ago, researchers found that the brain shows preparatory electrical activity a fraction of a second before a person reports having decided to move. Some concluded that free will is an illusion — that the brain acts first and the feeling of choosing is a story we tell afterward. And in my own field, I watch agency get damaged in front of me: a frontal-lobe injury that erases self-control, a compulsion that hijacks the will, an addiction that rewires wanting itself. I know, better than most, how much of what feels like "choice" runs on machinery a person did not install.

And yet I have never once been able to live, or practice medicine, as if no one is responsible for anything.
A single set of footprints on a path, a choice being walked out

Here is where I have landed, and I offer it humbly. The lab experiments describe simple, arbitrary flicks of the wrist. They tell us very little about the choices that actually make a life — whether to forgive, whether to keep a promise, whether to sit one more hour with a frightened patient. Those are not split-second twitches. They unfold over time, shaped by attention, habit, and character, all of which we can slowly cultivate. The brain proposes; something in us still disposes.

Freedom, I have come to think, is not a magic exemption from cause. It is real but conditioned — larger in a healthy, practiced, well-loved person, smaller in someone whose circuitry has been damaged or captured. That is exactly why I treat addiction as a disease and still ask the person to fight it; why I hold people responsible and also extend enormous mercy to those whose freedom was stolen by illness. Both at once. Anything less is either cruelty or naivety.

Faith, for me, sits comfortably here. The tradition I come from has always said we are both bound and free — shaped by everything that made us, and still answerable, still able to turn. Neuroscience has only filled in the mechanism of the "bound" part with breathtaking detail. It has not, and I suspect cannot, close the small, stubborn door through which a person turns toward the good. I have watched too many people walk through it.

This reflection is drawn from my book, The God Neuroscience Found — available on Amazon. If it resonated, the book goes much deeper, and I'd be glad to have you along.

Next post: Music, chills, and transcendence in the brain.

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Meditation, contemplation, and neuroplasticity

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For most of medical history, we believed the adult brain was essentially fixed — that you were dealt your neurons and spent the rest of your life slowly losing them. One of the great discoveries of modern neuroscience overturned that. The brain is plastic. It rewires itself, all your life, in response to what you repeatedly do. And that single fact quietly vindicated something the contemplative traditions have taught for thousands of years. When researchers began putting long-term meditators — monks, contemplatives, people with tens of thousands of hours of practice — into scanners, they found real, structural differences. Regions involved in attention and emotional regulation were stronger and better connected. The amygdala, the brain's alarm system, was calmer and quicker to settle. These were not people in a special mood for an afternoon. Their practice had, over years, reshaped the organ itself. You can, quite literally, change the shape of your brain b...
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Ninety-nine degrees: what the brain does in the moment a life turns

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There is a kind of suddenness that neurologists are trained to fear. When a patient tells me something happened all at once — the weakness, the drooping face, the loss of speech — I immediately start thinking about blood vessels. In my clinic, sudden usually means something tore or something clogged. But there is another kind of suddenness, and I have never known how to chart it. A man came to me for years with chronic headache. Fifteen years of it, and somewhere along the way the painkillers had quietly become part of the problem rather than the solution. I explained this to him at nearly every visit. He nodded at nearly every visit. Nothing changed. Then one morning he sat down and said, before I had asked him anything, "I can't live like this anymore." And from that week he did rebuild all of it — the medication, the sleep, the coffee, the way he carried his work home. Not gradually. From that week. What had I said that day that I had not said for fifteen years? Nothi...
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The more I learned about the brain, the more I found God

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When I was younger, I assumed that knowledge and faith were on a seesaw. The more science you loaded onto one side, the higher belief would rise off the ground — until one day it floated away entirely. Learn enough, and God would simply have nowhere left to stand. Thirty years inside the human brain taught me the opposite. Here is the strange thing no one warns you about in medical school: understanding does not shrink the mystery. It relocates it, and usually it makes it larger. You finally grasp how a neuron fires — and behind that clean fact stands the question of how eighty-six billion of them, firing in the dark, produce the experience of tasting coffee, or missing your mother, or believing anything at all. Every answer in neuroscience is a door, and behind almost every door is a bigger room. We honestly understand less than one percent of the human brain. The more precisely we map that one percent, the more clearly we see the size of the ninety-nine. ...
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