The amygdala and threat

When the body learns fear too fast

Before entering the article, we can return to the body for a moment.

Breathing.

Jaw.

Chest.

Belly.

Hands.

Feet.

Now, imagine a danger signal.

A sound.

An image.

A word.

A door closing.

A face changing.

A place that once seemed neutral and suddenly begins to tighten the body.

The heart accelerates.

The skin responds.

Breathing shortens.

The body learns.

Sometimes, it learns too fast.

And then, it takes time to unlearn.

This is exactly where the article “The human amygdala in threat learning and extinction”, by Sjoerd Meijer, Eleonora Carpino, Benjamin R. Kop, Jesse Lam, Lycia D. de Voogd, Karin Roelofs, and Lennart Verhagen, becomes so important.

The study offers causal evidence that the human amygdala participates in the rapid formation of conditioned threat responses and threat memories that resist extinction. To do this, the authors used transcranial ultrasound stimulation, or TUS, targeting the bilateral amygdala during Pavlovian threat conditioning in healthy adults.

For BrainLatam2026, this article opens a central question:

when the body learns fear, which internal space has been captured?

The original question of the article

The central question of the article can be formulated like this:

is the human amygdala causally necessary for rapidly acquiring conditioned threat responses and for forming threat memories that resist extinction?

This question is valuable because the amygdala has long been associated with fear, threat, emotional salience, and defensive learning.

But one thing is to observe amygdala activity in brain imaging.

Another is to modulate this structure in living humans, noninvasively, during threat learning, and observe what changes in the body.

The study makes this move.

It does not ask only whether the amygdala “lights up” during fear.

It asks whether temporarily modifying its activity changes how fast the body learns threat and how fast it can unlearn it.

That difference is enormous.

Because fear is not only an emotion.

It is bodily learning.

And every bodily learning leaves a trace.

What the article actually investigated

The study used TUS, a noninvasive technique capable of modulating deep brain structures with spatial and temporal precision, to target the bilateral amygdala during a Pavlovian threat-conditioning task.

The authors analyzed trial-level skin conductance responses using linear mixed models and computational modeling.

Participants viewed images associated with different probabilities of threat. Some images were occasionally followed by a mild electric shock, teaching the body which stimuli should be perceived as dangerous.

Fear response intensity was measured through skin conductance, and during part of the task, the amygdala was stimulated with ultrasound.

The central result was strong: amygdala stimulation slowed the initial acquisition of threat, increased later extinction, and modulated retrospective declarative memory about threat probability. This effect appeared when TUS was directed to the amygdala, but not when the target was the hippocampus in a second control experiment.

In direct language:

the body learned fear more slowly.

And then unlearned fear more quickly.

The article summarizes this emotional state of learning as something close to:

learning fast, forgetting slowly.

For BrainLatam2026, this phrase is decisive.

Because much human suffering works this way.

The body rapidly learns that something is danger.

But even when the danger passes, the body continues living as if the world were still threatening.

The strength of the article

The strength of the article lies in showing a causal relationship between the amygdala and threat learning in humans.

It is not only a correlation.

It is not only a brain image.

It is a temporary and focal intervention during an emotional learning task, accompanied by physiological skin responses and computational modeling.

This allows a deeper question:

does the amygdala help the body form threat memories that later resist change?

The study suggests that it does.

And for clinical thinking, this matters because many conditions related to anxiety and trauma involve precisely threat memories that persist even when the context has changed.

The authors also point to the potential of TUS for targeted neuromodulation of deep structures implicated in conditions such as post-traumatic stress disorder, although this path still requires specific clinical investigation.

BrainLatam2026 reads this point carefully.

The article does not promise a cure.

It opens a path.

And the path is precious:

perhaps fear extinction depends not only on exposing the body again to the stimulus, but on changing the learning state in which this body meets the world again.

The local optimum of the article

The local optimum of the article lies in the causal neuroscience of threat learning and extinction in humans.

It is strong because it combines:

TUS.

Pavlovian conditioning.

Skin conductance.

Computational modeling.

Declarative memory.

Comparison between amygdala and hippocampus.

The article does not directly measure real trauma, childhood, Tekoha, Jiwasa, racism, poverty, school, family, territory, or life history.

It measures a controlled experimental task of threat learning.

This limit does not diminish the article.

It defines its field of precision.

BrainLatam2026 enters exactly there:

how can we bring this precision into life without reducing life to the laboratory?

Threat as spatial capture

In the 5D Body-Territory model, perception is an abstraction represented inside a body-territory in five dimensions: 3D, movement, and qualia.

When the body learns threat, it does not learn only a piece of information.

It reorganizes space.

A stimulus that was neutral begins to occupy the center.

An image grows.

A sound comes closer.

A place narrows.

A memory returns.

A possibility of action disappears.

Threat transforms the field.

The body stops asking:

“what is this?”

And begins asking:

“how do I survive this?”

This change is spatial.

Danger feels near, even when it is far.

It feels large, even when it is small.

It feels present, even when it has already passed.

It feels probable, even when it no longer happens.

That is why the article speaks so strongly to BrainLatam2026.

The amygdala does not only participate in fear.

It participates in the speed with which the body gives spatial priority to danger.

Zone 3: when the world becomes threat

In BrainLatam2026 language, Zone 3 is the state in which the body-territory is hijacked by threat.

Attention narrows.

Breathing shortens.

The skin responds.

The body prepares.

The world loses nuance.

Possibility of action decreases.

The threatening stimulus becomes the center of the field.

In the experiment, threat is controlled: an image, a probability of shock, a physiological response.

But in life, Zone 3 can be activated by many things.

A word.

A school.

A siren.

A corridor.

A boss.

A hospital.

A uniform.

A gaze.

A demand.

A touch.

A territory.

Zone 3 is useful when there is real danger.

It saves.

But when the body remains there after the danger has passed, life narrows.

Extinction, then, is not simply “erasing fear.”

It is returning the body to the possibility of world.

Extinction is not simple forgetting

The article speaks about threat extinction.

But extinction does not mean simply erasing memory.

In practice, the body learns a new relation:

“this used to mean danger, but now it may not.”

This new learning has to compete with the old trace.

That is why fear can return.

That is why a body can rationally know it is safe and still feel threat.

The skin knows before the sentence.

Breathing knows before explanation.

The chest knows before logic.

The amygdala participates in this emotional state in which the body learns fast and forgets slowly.

BrainLatam2026 translates:

extinction is diplomacy between old 5D spaces and new 5D spaces.

The old space says:

“danger.”

The new space tries to say:

“now there is safety.”

But the body does not believe only in words.

It needs repetition.

State.

Tekoha.

Rhythm.

Presence.

Lived time.

Traces and reactivation of 5D spaces

A learned fear leaves a trace.

In the BrainLatam2026 model, a previously activated internal space has a greater probability of reactivation.

This is true for memories, images, threats, shame, pain, belonging, and trauma.

A stimulus associated with danger can reopen an entire 5D space.

Not only a memory.

A body.

A breathing pattern.

A posture.

An expectation.

An escape route.

A way of seeing the world.

The article shows, on an experimental scale, how threat learning can be rapid and resistant.

BrainLatam2026 expands:

the problem is not only remembering the threat.

The problem is the body returning to inhabit the internal space of threat.

The person does not only think about fear.

They enter the territory of fear.

That is why clinical and social interventions cannot treat memory only as content.

They need to treat memory as a reactivatable space.

Tekoha: when the environment enters as internal state

Tekoha is extended interoception.

It is territory entering the body’s internal states.

In threat learning, Tekoha is decisive.

The same stimulus can be lived in different ways depending on the environment.

A safe room can allow extinction.

A tense room can reinforce threat.

A careful therapist can expand Zone 2.

A punitive environment can push the body into Zone 3.

A school can help a child unlearn fear.

Or it can teach the child that making mistakes is dangerous.

A city can expand freedom.

Or it can keep bodies in permanent vigilance.

The amygdala learns in a body.

And this body learns in a territory.

That is why the BrainLatam2026 question is not only:

which brain circuit sustains fear?

It is also:

which Tekoha keeps this circuit active?

APUS: threat as reorganization of the field of action

APUS is extended proprioception.

It is territory entering through position, posture, distance, direction, and field of action.

When the body detects threat, APUS changes.

The space ahead becomes risk.

The door becomes exit.

The corner becomes shelter.

The person nearby becomes possible threat.

The sound behind becomes alert.

Posture changes before explanation.

Threat reorganizes the field of action.

The body asks:

can I run?

can I freeze?

can I fight?

can I hide?

can I approach?

can I breathe?

can I trust?

The amygdala, in this sense, is not only a “fear” structure.

It participates in the rapid reorganization of the bodily field before threat signals.

BrainLatam2026 translates:

threat is APUS in survival mode.

Movement and lived time in fear

In fear, time changes.

One second can last too long.

Waiting can feel endless.

A memory can bring the past into the present.

A traumatized body can live now as if it were before.

The article works with learning and extinction across experimental trials.

BrainLatam2026 reads this as movement of internal spaces.

During acquisition, the space of threat grows.

During extinction, another space tries to grow:

safety.

But safety does not appear only because the shock stopped.

It needs to overcome the inertia of the old space.

That is why, in trauma, anxiety, and persistent fear, lived time can become stuck.

The past does not pass.

The body keeps waiting for the shock.

Even when reason knows it is not coming.

The qualia of threat

Threat has qualia.

Tightness.

Cold.

Heat.

Nausea.

Urgency.

Disgust.

Trembling.

Vigilance.

Anger.

Paralysis.

The body does not learn threat as an abstract proposition.

It learns threat as sensation.

That is why saying “you do not need to be afraid” is rarely enough.

Because fear is not only a sentence.

It is qualia organized in the body-territory.

The article measures skin conductance, a physiological window into autonomic arousal during threat learning.

BrainLatam2026 asks:

which qualia accompanies this response?

And further:

how can the qualia of threat become a qualia of safety without violating the body that learned to survive?

Declarative memory and bodily memory

The article also observed modulation of retrospective declarative memory for threat probability.

This is important.

Because the body learns in several ways.

A person may say:

“I know it was safe.”

But the skin may respond as threat.

Or they may say:

“I know it was dangerous.”

But not be able to explain why the body was already on alert before.

Declarative memory and bodily memory converse, but they are not identical.

BrainLatam2026 would say:

language organizes one space.

skin organizes another.

breathing organizes another.

posture organizes another.

Care needs to listen to all of them.

DNA Intelligence and Artificial Intelligence

This article also allows us to think about DNA Intelligence and Artificial Intelligence.

DNA Intelligence is information lived in the body.

It is the body learning danger.

It is the skin anticipating.

It is the amygdala helping prioritize threat.

It is breathing changing.

It is memory leaving traces.

It is life trying to stay alive.

Artificial Intelligence can help model response patterns, predict relapse risk, personalize exposure, organize physiological data, detect signs of hyperactivation, and support therapies.

But AI does not feel fear.

It does not feel the body freeze.

It does not feel the skin respond.

It does not live the return of a memory.

It does not know the cost of inhabiting a threatening Tekoha.

AI organizes traces.

DNA Intelligence lives the traces.

The question is:

how can we use AI to support extinction, care, and Zone 2 without transforming suffering into a permanent risk profile?

Jiwasa: fear is also collective

Threat is never only individual.

The body learns fear in Jiwasa.

Family.

School.

Work.

Religion.

Police.

State.

City.

Market.

War.

Racism.

Gender.

Class.

Algorithm.

News.

Collective memory.

A body may learn threat because it lived an experimental shock.

But it may also learn threat because it lived humiliation, abandonment, violence, hunger, prejudice, war, displacement, harassment, instability, or oppression.

The article shows the amygdala in a controlled task.

BrainLatam2026 asks:

which Jiwasas make bodies learn threat too fast?

And further:

which Jiwasas make it difficult to unlearn fear?

Because it is not enough to treat the amygdala if the territory continues to threaten.

It is not enough to speak about extinction if the body returns every day to the same field of danger.

A Jiwasa of care helps the body update.

A Jiwasa of capture keeps the body trapped in threat.

Generous decolonial critique

The article is rigorous and powerful because it shows causality in humans using a noninvasive technology for deep neuromodulation.

But BrainLatam2026 needs to ask the decolonial question:

what threat are we talking about?

In the laboratory, threat is controlled.

In life, threat is historical.

In the laboratory, the shock ends.

In life, threat may continue in the street, at work, in school, in the racialized body, in the female body, in the migrant body, in the poor body, in the Indigenous body, in the dissident body.

In the laboratory, extinction happens when the stimulus is no longer followed by shock.

In life, extinction requires the territory to change too.

This critique does not diminish the article.

It expands its consequence.

The article shows that the amygdala helps the body learn threat.

BrainLatam2026 asks:

who is teaching threat to bodies?

who profits from bodies in Zone 3?

which public policies could reduce the social learning of fear?

BrainLatam2026 experimental proposal

From this article, BrainLatam2026 could propose an ecological experiment:

How do different Tekohas modulate acquisition, extinction, and reactivation of threat in 5D spaces?

Possible design:

• adults exposed to a mild and ethical threat-learning task;

• experimental contexts with a Tekoha of care versus a Tekoha of pressure;

• visual, auditory, and spatial stimuli;

• acquisition phase;

• extinction phase;

• mild reinstatement or reactivation phase;

• comparison among participants with different histories of safety, stress, and belonging.

Measures:

• fMRI or TUS, when ethically and technically possible, to investigate deep circuits;

• EEG for temporal dynamics of expectation and error;

• fNIRS for prefrontal regulation during extinction;

• HRV/RMSSD for autonomic regulation;

• breathing for rhythm and lived time;

• GSR for threat response;

• EMG of jaw, trapezius, and face for tension;

• eye-tracking for vigilance and attentional return;

• phenomenological report of qualia;

• APUS mapping: approach, avoidance, freezing;

• Tekoha analysis: safe, neutral, or threatening environment;

• Jiwasa analysis: support, isolation, social trust, history of capture.

The question would not be only:

who extinguishes fear faster?

The question would be:

what kind of territory allows the body to believe that danger has passed?

DANA and fear data

Researching threat requires DANA.

Fear data are delicate.

Skin conductance.

Heart rate.

Breathing.

Trauma report.

Brain image.

Response to stimuli.

Clinical history.

These data can care.

Or they can capture.

DANA asks:

who will have access to these signals?

will they be used to support care or to classify risk?

will the person be able to withdraw consent?

will the metric be interpreted with history and territory?

will the body be protected after being activated?

Measuring fear touches an ethical frontier.

Because every threat datum comes from a body that had to defend itself.

Body-Territory Diplomacy

If the body-territory is the minimum unit of the State, then reducing fear is not only a clinical task.

It is public diplomacy.

A safe school is social neuromodulation.

A well-lit city is social neuromodulation.

An anti-racist policy is social neuromodulation.

A care network is social neuromodulation.

A non-humiliating clinical encounter is social neuromodulation.

A justice system that protects is social neuromodulation.

The article shows that modulating the amygdala can alter threat learning and extinction in an experimental context.

BrainLatam2026 expands:

territory also modulates the amygdala every day.

The political question is:

are we building territories that teach safety or territories that train fear?

Closing

The article by Meijer and colleagues matters because it shows that the human amygdala causally participates in an emotional learning state in which the body learns threat rapidly and tends to forget it slowly.

Transcranial ultrasound stimulation directed at the amygdala slowed initial threat acquisition, increased later extinction, and modulated retrospective declarative memory of threat probability.

For BrainLatam2026, this article opens an essential path:

threat is spatial.

Fear occupies space.

Memory occupies space.

Extinction tries to create another space.

Zone 3 narrows the world.

Tekoha can maintain or relieve the threat state.

Jiwasa can care or capture.

And fear traces can reactivate 5D spaces even when danger has already passed.

The question that remains is:

how can we help the body believe again that there is world after threat?

Not only with words.

But with state.

With territory.

With repetition.

With care.

With science.

With diplomacy.

With Tekoha.

With Jiwasa.

And with measures that listen to fear without turning the body into a prisoner of its own response.

Highlighted reference

Commented article:
Meijer, S., Carpino, E., Kop, B. R., Lam, J., de Voogd, L. D., Roelofs, K., & Verhagen, L. (2026).
The human amygdala in threat learning and extinction.
Science Advances, 12(13), eaea8233.
DOI: 10.1126/sciadv.aea8233.

This article is the main basis for this BrainLatam2026 commentary. From its investigation with transcranial ultrasound stimulation, Pavlovian threat conditioning, skin conductance, and computational modeling, we expand the discussion toward threat, extinction, Tekoha, Zone 3, traces, reactivation of 5D spaces, defensive APUS, the Jiwasa of fear, DANA of physiological data, and the question of how to help the body-territory unlearn threats without denying the history that taught fear.