Why Panic Can Feel Like It Comes From Nowhere

One of the strangest things about panic is how often it arrives without a story attached. There's no clear reason, nothing you can point to, just the alarm going off in the middle of an ordinary moment.

In an earlier piece, I wrote about panic as an attachment alarm rather than a fear response. Panic isn't your brain asking "am I in danger?" It's an old, loud signal built to maintain connection, telling you that you're disconnected right now, or convinced that disconnection is about to happen. That system, which researchers call PANIC/GRIEF, runs on different chemistry than fear does and directly affects your breathing, heart rate, and pain sensitivity, which is why the alarm shows up as a full-body event rather than just a thought.

What I want to get into here is a different question. Why does the alarm so often go off with no obvious trigger? Why does it feel like it's coming from nowhere?

Two kinds of attention

I think part of the answer has to do with how the two halves of the brain handle information differently, an idea the psychiatrist Iain McGilchrist has spent much of his career working out.

His argument isn't the old, oversimplified version you may have heard, that the left brain does logic and the right brain does creativity. McGilchrist's case is that the two hemispheres aren't divided by subject matter at all. They're divided by the kind of attention each one pays to the world. Both hemispheres are involved in most of what the brain does. They just interact with experience in different ways.

The right hemisphere takes in the whole picture at once: context, relationship, body state, the things that are true but haven't been put into words yet. It's comfortable holding something ambiguous without rushing to resolve it. The left hemisphere works differently. It wants the explicit, the categorized, the already-known. It's fast and confident, and according to McGilchrist, it doesn't know what it doesn't know. If something doesn't fit a category it already has, the left hemisphere tends to filter it out rather than sit with the uncertainty.

McGilchrist also argues that the right hemisphere is more closely tied to the body, to reading relational and emotional cues, and to intense emotional states in general, especially the harder ones like fear and distress.

A signal with nowhere to go

Put those two pieces together and it starts to make sense how you can know something and not know it at the same time.

It's entirely possible for your right hemisphere to pick up on something real: a shift in someone's tone, a withdrawal, a relationship that's fraying, a sense that you're more alone in a room full of people than you should be. All of that can register well before it can be put into words or sorted into a category the left hemisphere will accept. If the left hemisphere can't find a clean, explicit story for what's being sensed, it may not integrate the signal at all. The information doesn't vanish. It just doesn't make it into the version of events you're consciously telling yourself.

So the body notices something and signals it, but the signal has no way into the ordinary channel of thought and language. This might be part of why Freud paid such close attention to slips of the tongue, words that come out unintended and seem out of place, and to dream interpretation, even though he wouldn't have described it in these terms. Both were attempts to reach content that was present but blocked from conscious, verbal access. The PANIC/GRIEF system doesn't need permission from your conscious narrative to act. If the felt sense of disconnection is strong enough and the explicit story isn't catching up to it, the alarm keeps escalating until it's loud enough that you can't ignore it. That's one way to understand why panic so often hits with no obvious trigger. The trigger was there. It just didn't pass through the part of the brain that explains things to you in words.

Why this matters for treatment

This is a contested area of neuroscience. McGilchrist's broader claims about the hemispheres have real critics, and some argue he overstates how cleanly these functions divide. So know that this isn't settled fact.

But the narrower point, that something can be accurately sensed in the body and in relationship before it's consciously articulated, fits well with what's already known about how the PANIC/GRIEF system works. It doesn't wait for you to have a sentence ready. It acts on what's felt, not on what's been said yet.

That has a practical implication. If the original signal never passed through the part of you built to name, define, and explain things in words, then reassuring yourself in that same verbal mode is less likely to help than something that can reach the signal where it actually lives. You can tell someone, accurately, that there's no danger in the room, and it can still miss the point, because the alarm was never about the room. This is a big part of why somatic and body-based approaches tend to reach panic in a way that talking alone doesn't. The work isn't just building a better explanation. It's helping the part of you that senses things before it can name them learn, slowly, that it's not as alone as it fears, and that it now has more capacity to handle grief and aloneness than it did back when it first learned to be afraid of them.

Reference notes: McGilchrist's claims about hemispheric attention styles, the right hemisphere's role in holding ambiguity and context, the left hemisphere's tendency toward premature categorization and closure, and the right hemisphere's closer relationship to bodily and relational awareness, come from his 2009 book The Master and His Emissary: The Divided Brain and the Making of the Western World and his 2021 follow-up The Matter with Things. These claims are influential but not uncontested. Michael Spezio, a psychologist at Scripps College, published a critical assessment in 2019, "McGilchrist and hemisphere lateralization: a neuroscientific and metaanalytic assessment," in the journal Religion, Brain & Behavior, arguing that recent meta-analyses do not support the sweeping, oppositional picture of hemispheric difference McGilchrist describes. The connection between this framework and panic attacks specifically is my own synthesis, drawn from putting McGilchrist's model of attention alongside the PANIC/GRIEF research of Jaak Panksepp covered in the companion piece, not a claim McGilchrist has made himself.