Where Emotions Come From in the Brain (And Why It's Deeper Than You Think)

If you've ever sat in therapy, had a genuine insight about yourself, and then watched yourself do the exact same thing three days later - you're not failing at therapy. You've just bumped into something real about how emotions actually work.

Where emotions come from in the brain is a much older, stranger story than most of us were taught.

Emotions don't start where you think they do

We tend to treat emotions as psychological - shaped by experience, driven by memory, organized into patterns we can eventually understand and change. Anxiety becomes "I'm afraid they'll leave." Rage becomes "I always do this." Grief becomes a story with a timeline.

But underneath all of that is something that doesn't have a story yet. Something that isn't about anything. A pull, a contraction, a wave of activation that feels almost animal before it feels like anything else.

That's not poetic language. It might be neuroscience.

The part of the brain that runs the show

Neuroscientist Jaak Panksepp spent decades tracing where emotions come from in the brain, and what he kept finding was that the most fundamental emotional systems don't live in the cortex - the part we usually think of when we think about the brain. They live in the brainstem and midbrain, in structures so ancient they were doing their job hundreds of millions of years before humans developed the capacity for language or self-reflection.

The hub of all of this is a region called the periaqueductal gray, or PAG. It sits in the midbrain, and it shows up in every primary emotional circuit Panksepp identified.

He found at least seven of these systems:

• RAGE - the energy of defense and attack

• FEAR - the impulse to freeze or flee

• PANIC/GRIEF - the distress of disconnection

• SEEKING - the drive toward exploration and anticipation

• LUST - sexual desire

• CARE - the pull toward nurturing

• PLAY - the joy of social engagement

Every one of them runs through the PAG. It is, in Panksepp's framing, the deepest trunk of each emotional tree.

What "primary" actually means here

Here's the part that I find genuinely important - and that changes how I think about therapy.

These emotional systems remain fully intact even when the cerebral cortex is removed. Animals that have had their higher brain surgically removed still show fear, rage, play, and separation distress. Their emotional lives continue. No cortex required.

Which means these emotions aren't constructed by the thinking brain. They don't need memory or interpretation or narrative. They're older than that - encoded in the genome, present across every mammal alive, doing exactly what they evolved to do.

Panksepp used a tree image to describe this. The PAG and brainstem structures are the roots and trunk - structural, essential, non-negotiable. The cortical systems are the canopy: dynamic, responsive, but completely dependent on what rises from below. The canopy, he wrote, can't function without the nourishment it receives from the roots.

Three layers (and why they matter)

He organized emotional experience into three levels, and I think this framework is worth sitting with:

Primary affect is the raw activation - pre-verbal, pre-narrative, not yet "about" anything. Pure FEAR. Pure grief. Pure seeking urge. This is what the PAG generates. The body before the story.

Secondary affect is where learning and conditioning layer on. This is where FEAR starts to attach to specific people, places, dynamics. Where your nervous system builds patterns from experience.

Tertiary affect is the cognitive layer - meaning, identity, narrative. "This is just who I am." "I always do this in relationships."

Most of what happens in traditional talk therapy lives at that third level. Which isn't nothing — that layer matters. But the generator lives lower, and working only at the top of the stack is part of why insight often isn't enough.

The thing your thinking brain can't fix

If you've felt the frustration of understanding something about yourself and still not being able to change it, this is what's happening.

The PANIC/GRIEF system that fires when you feel disconnected from someone you love — that circuit isn't changed by understanding why it fires. It's changed by what your nervous system actually does with the activation. Whether the feeling gets to complete its arc. Whether something new happens at the level of the body, not just the mind.

This is the clinical logic behind somatic therapies, IFS, and approaches like Deep Brain Reorienting. Not that the story doesn't matter - it does - but that the story is built on top of something older that also needs to be reached.

Before "I'm afraid of abandonment," there's just fear

One of the most grounding things Panksepp's work offers is a kind of permission to take the body seriously.

Before your fear becomes a narrative about your attachment history, before it becomes "I always do this," before it becomes anything you can think or talk about — there is just the PANIC/GRIEF circuit firing. The same one that makes a puppy cry when it's separated from its mother. The same one in a human infant wailing before it has any concept of what loneliness means.

That system is ancient. It is real. And it lives in the brainstem, organized long before the cortex ever got involved.

Understanding this doesn't make healing easier. But it might make the part of you that keeps feeling things your mind has already "figured out" make a little more sense - and deserve a little more compassion.

What this means practically

You don't need to know what the PAG is to take something from this. The simpler version is: your emotions are not failures of insight. They aren't evidence that you're not working hard enough or haven't thought clearly enough about your life. They arise from systems that were doing their job long before language existed.

Therapy that works at the body level - that slows down, attends to sensation, creates space for activation to actually move - is trying to reach the depth where these circuits live. Not to bypass the thinking brain, but to include the whole system.

The goal isn't to stop having raw emotions. It's to help your nervous system - roots, trunk, and canopy - work together instead of against each other.

Reference: Panksepp, J. (1998). Affective neuroscience: The foundations of human and animal emotions. Oxford University Press.

About the Author: Katie is a Licensed Professional Clinical Counselor (LPCC-S) and board-certified art therapist (ATR-BC) at Lacuna Counseling in Columbus, Ohio. She is IFS Level 2 Certified. Katie specializes in neurodivergent-affirming therapy, integrating Internal Family Systems, art therapy, and somatic approaches, including Deep Brain Reorienting.

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