When Two Brains Receive the Same World
When Two Brains Receive the Same World
Cooperation, synchrony, and the shared rhythm of attention
The Feeling–Knowing Taá — opening the crack of decolonization
I inhale, and before thought arrives, I feel the presence of another body shaping the space around me.
My breath adjusts, my posture shifts, my attention leans toward the other like a tide pulled by an unseen moon.
Before I think cooperation, my body is already coordinating.
Before I decide to trust, something in me is already sensing the world through another nervous system.
That is Taá — the moment when cognition is born from sensation, not abstraction.
And yet I notice how even the words I use to describe this are colonized.
A scientific vocabulary that reduces my body to a machine, my mind to a deficit, my spirituality to superstition, my politics to consumption.
This is why so many neuroscientists avoid asking the questions that colonial science cannot name.
But when I sense before I think — when Taá manifests — I understand there is no separation between Neuroscience, Politics, and Espiritualidade DANA (Utupe, Xapiri, living memory).
Colonization is not only historical; it hides in the very words that prevent us from existing whole.
Every scientific discovery, when read with courage, breaks open a small doorway out of Zona 3 and returns the body to what it always was: território vivo de mundos possíveis.
The Study That Lets Two Brains Breathe the Same World
This blog is anchored in the landmark 2025 study by
Ignacio Leiva-Cisterna, Pablo Barraza, Eric Rodríguez, and Guillaume Dumas, published in Social Cognitive and Affective Neuroscience (SCAN):
“Multibrain Sensory Stimulation Enhances Dyadic Cooperative Behavior”
(search terms: Leiva-Cisterna 2025, Barraza 2025, Rodríguez 2025, Dumas 2025, SCAN nsaf104)
This article — often referred to simply by its code nsaf104 — is already becoming a reference for anyone studying hyperscanning EEG and cooperation.
It asks a deceptively simple question:
What happens when two brains receive the same sensory world at the same time?
Does cooperation emerge from shared stimulation?
The Scientific Question
Cooperation is usually studied as:
decision-making,
moral reasoning,
communication,
or social behavior.
But this study proposes a different idea:
Cooperation begins before thought — in the synchronization of sensory rhythms.
When two bodies perceive a stimulus simultaneously, their neural oscillations begin to align.
This entrainment — measured as inter-brain synchrony — may be the substrate of dyadic cooperation.
Methods — How the Study Measured Two Brains at Once
To explore this, the authors used hyperscanning EEG, recording both individuals simultaneously.
The preprocessing pipeline was rigorous:
ICA (Independent Component Analysis)
Removal of muscle artifacts, eye blinks, environmental noise.
FFT (Fast Fourier Transform)
Power spectra across alpha, beta, theta bands.
PCA (Principal Component Analysis)
Extraction of common variance patterns across brains.
CSD (Current Source Density)
Improved spatial resolution of scalp topographies.
Inter-Brain Synchrony Metrics
Phase-locking, coherence, cross-correlation — direct measures of whether two nervous systems oscillate together.
The term “multibrain sensory stimulation” describes the simultaneous presentation of coordinated audiovisual inputs, designed to create a temporal alignment of sensory flow.
Results — The World Enters Two Brains at the Same Rhythm
The findings are clear:
Shared stimulation increases inter-brain synchrony.
Higher synchrony predicts more effective dyadic cooperation.
The effect is strongest in beta-band oscillations, often associated with sensorimotor integration and decision preparation.
This means:
Two brains that feel the world together begin to think together.
Reading Through BrainLatam Concepts
Mente Damasiana
Consciousness is the weaving of interoception and proprioception.
Shared stimulation synchronizes these internal rhythms across bodies.
Quorum Sensing Humano (QSH)
Humans regulate each other’s physiology; synchrony is quorum.
Eus Tensionais
Each “Eu” emerges as a balance of tension, expectation, and movement.
Dyads synchronize their Eus Tensionais when sharing sensory input.
Zona 2 (Fruição Criativa)
Cooperation appears when fear, rigidity, and ideology fade — synchrony generates the calm openness of Zona 2.
Yãy hã mĩy (Maxakali — always mention origin)
Originally the act of imitating the animal before hunting.
Here, each partner imitates the perceptual rhythm of the other.
DANA (Espiritualidade do DNA)
The biological intelligence that organizes the body aligns with another body’s rhythm.
How This Study Adjusts Our Thinking
We often imagine cooperation as:
choice,
intention,
negotiation.
But the evidence suggests:
Cooperation begins in the body — before cognition.
This destabilizes colonial narratives that frame social behavior as moral or rational superiority.
Cooperation is not a cultural achievement; it is a biological synchrony accessible to all.
Normative Implications for LATAM Education, Health, and Policy
Classrooms must be designed to synchronize sensory environments, not merely transmit information.
Community decision-making spaces should reduce noise and sensory fragmentation.
Public health interventions can rely on dyadic regulation principles.
Pedagogies of co-presence (common in Amerindian communities) find scientific validation here.
Keywords for Search Engines
Leiva-Cisterna 2025, Barraza 2025, Rodríguez 2025, Guillaume Dumas, SCAN 2025, nsaf104, multibrain sensory stimulation, dyadic cooperative behavior, hyperscanning EEG, inter-brain synchrony, ICA, FFT, PCA, CSD
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The Brain in Daily Life -Assisted horsemanship, sport, and embodied enjoyment
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Dialogical Multiplication and Indigenous Psychology - How to let psychology listen without erasing the Other
The Feeling and Knowing Taá of Christmas
Republican Capitalism of Spirits without Bodies
NIRS fNIRS EEG ERP Multimodal NIRS-EEG
#Decolonial
#Neuroscience
#NIRSfNIRS
#Multimodal
#NIRSEEG
#Jiwasa
#Taa
#CBDCdeVarejo
#DREX
#DREXcidadão
