Built to Read Everything
On superpowers, hypermobility, neurodivergence, mast cell sensitivity, and why modern buildings impact one more acutely than others
The architecture of mismatch
Walk into most modern offices and homes and notice what happens next. The fluorescent flicker at the edge of awareness. The constant reverberation of sound off hard surfaces. The ventilation system hum underneath everything. The off-gassing from fresh paint and synthetic furniture. The electromagnetic density from many people’s phones and WiFi stacked in one space.
Most nervous systems adjust. Habituate. Filter. Move on.
Some nervous systems do not.
For certain people, within two hours in that space, the nervous system has escalated from alert to dysregulated to barely holding. They leave thinking they are broken. Completely unaware of why that might be.
What if the problem is not the nervous system. What if the problem is that the building was designed by people who cannot perceive what that nervous system perceives, for bodies that do not exist that way.
What if the building is the catastrophe, and the sensitivity is the signal.
The ancestral hypothesis
I want to be direct about what follows. It is a hypothesis, not established science. But it is worth exploring because the pieces fit coherently.
It is possible that this cluster of traits - proprioceptive uncertainty driving heightened sensory processing, elevated mast cell reactivity, autonomic lability, the constant reading of environmental signals - represents an ancestrally functional pattern.
Not broken nervous systems. Calibrated ones.
A tribe would have needed people whose sensory systems were set to high gain. The ones who felt the mood shift before it was spoken. Who sensed something wrong before it arrived. Who moved differently, felt through surfaces, predicted. The ones positioned to read what others could not.
Across cultures, across histories, these bodies appear as the healer, the yogi, the guide. The ones whose sensibility was not a liability but a resource. Consulted, not diagnosed. Seen as gifted. The quantum entanglement gift, the ability to sense mold, a problem with a food source or water.
ADHD traits carry established adaptive value in high-novelty, shifting environments. Mast cell reactivity is an ancient immune strategy that becomes dysregulated when there is insufficient actual threat to direct it productively. Joint laxity is normal constitutional variation that becomes problematic not in all contexts, but specifically in sedentary, structured, high-demand modern ones.
The synthesis this specific clustering as an ancestral sensory type is my own reasoning. There is no formal evolutionary biology literature mapping it. But the pieces are coherent. The logic holds.
The body was built for something else
I spent years failing at overhead squats. Handstand holds. Movements requiring me to know precisely where my joints were in space and hold them there. I was fit. I trained consistently. My coaches were patient and eventually puzzled. I simply could not master them.
I attributed it to coordination, to not having started young enough, to something constitutional and vague.
Then I understood: hypermobile joints generate imprecise proprioceptive signals. The brain is navigating from noise. Overhead movements, which require the nervous system to place a limb at the edge of its range and hold it with precision, are exactly the class of movements most demanding of accurate proprioceptive input. I was not uncoordinated. I was working from noisier data. My gains were actually remarkable.
Now I understand.
The body that cannot locate itself precisely in space compensates by reading everything else. This is not a decision. It is physiology adjusting to available signal.There is a pattern hidden in the overlap between hypermobility, neurodivergence, and mast cell sensitivity. Not coincidence. Not dysfunction. Architecture.
A cross-sectional study from 2022 (Csecs et al., Frontiers in Psychiatry) found that neurodivergent adults are 4.5 times more likely to have generalised joint hypermobility than the general population. Among neurodiverse women specifically, that figure is 69%. The rate is not a rounding error. It is a feature.
Joint hypermobility is not simply about flexibility. Hypermobile joints, held by more elastic collagen, generate imprecise positional signals. The mechanoreceptors embedded in joint capsules send ambiguous information to the brain about where the limb actually is. The brain has to work harder. It navigates from noise.
But that is only one thread in a larger architecture.
The connective tissue that holds joints together is the same tissue that forms the walls of blood vessels, the lining of the gut, the sheaths around nerves, the capsules that contain organs. When that tissue is constitutionally more elastic, every system depending on it shifts. A single genetic clue makes this visible: duplications in TPSAB1, which encodes alpha tryptase, produce elevated mast cell activity, joint hypermobility, and dysautonomia in a dose-dependent manner. More copies. More symptoms. Across three seemingly unrelated systems.
The triad is now clinically recognised: POTS, MCAS, and hypermobility share mechanisms.
What holds them together is a feedback loop that has been demonstrated in animal models and cell studies. Neuropeptides activate mast cells directly. Activated mast cells release mediators that stimulate the same nerve fibres. Arousal triggers mast cell degranulation. Mast cell mediators amplify arousal. In a body with looser connective tissue and a more reactive mast cell population, that loop is easier to enter and harder to exit.
This loop has not yet been formally tested in humans with this cluster. But the clinical pattern, symptom escalation with arousal, autonomic dysregulation, sensory sensitivity - is entirely consistent with it.
What is unmistakeable is this: the modern environment was not built for bodies that sense at this resolution. And that mismatch is not a personal failing. It is an environmental design failure.
What the body is actually doing
Here is where it becomes architectural.
Recent neuroimaging (British Journal of Psychiatry, 2024) found significantly enhanced activation of the anterior and mid insula in hypermobile individuals in response to both internal body states and emotional stimuli. The anterior insula is the region where physiological signals become conscious feeling. It is where the body becomes experience.
Severity of hypermobility correlated with the degree of insular activation. The brain is receiving more signal. It is processing more information. It is experiencing more of what is actually happening.
One proposed interpretation: imprecise proprioceptive signals from loose connective tissue generate greater interoceptive prediction error. The brain cannot efficiently suppress these signals. They arrive in consciousness at higher amplitude. This fits the neuroimaging finding, but it has not yet been experimentally tested.
What emerges is a coherent nervous system architecture. One that reads what others filter. That feels the shift in a room before words arrive. That senses pressure in air, tone in voice, emotion before it is named. That processes environmental input at higher resolution.
All the time.
How buildings become biology
This is the core claim: architecture is not separate from health. It is a biological input as direct as food or light or sleep.
The sensing nervous system responds to the physical world at a resolution that most design practice ignores entirely.
Fluorescent lighting does not simply look harsh. Its imperceptible flicker detectable by certain nervous systems is a physiological input arriving at a system already operating at higher processing cost. It is not aesthetic. It is allostatic load, arriving continuously, received by a body that cannot filter it the way others do.
Open-plan sound, reverberating off hard surfaces in concrete and glass, is not bad acoustics. For a sensory-amplified nervous system, it is continuous arousal. It is the autonomic system being asked to hold state in an environment that will not stop signalling.
VOC-laden air from synthetic materials, fresh paint, new furniture or a person with mast cell sensitivity, it is a continuous activation trigger. Not an inconvenience. A cascade.
The cleared surfaces, the soft edges, the quiet, the consistent materials, the predictable spatial transitions. These are not luxury preferences. They are the structural equivalent of providing the connective tissue scaffolding the body does not possess. They are the architecture that makes the sensitivity workable rather than overwhelming.
PAS 6463:2022—the British Standards Institution’s first formal guidance on neurodivergent design—translates this into principles: diffuse light sources, acoustic zoning, quiet refuge spaces, reduced environmental complexity, choice and control over sensory conditions. The evidence base here is primarily observational and survey-based. Randomised controlled trials on built environment interventions in neurodivergent populations essentially do not yet exist.
But the underlying biology is legible. Neuroarchitecture research has begun documenting physiological responses to architectural form in neurotypical samples—HRV shifts, prefrontal oxygen changes, markers of neural processing load when architecture deviates from the visual patterns the nervous system evolved to process without effort. In people with amplified sensory processing, the response cost would be steeper. The relief from optimised environments correspondingly greater.
This has not yet been directly tested. But the direction of travel seems obvious.
What happens when oestrogen leaves
Then perimenopause.
Oestrogen and progesterone are not simply reproductive hormones. They stabilise three systems simultaneously: connective tissue integrity, mast cell behaviour, and autonomic nervous system regulation. This is not metaphorical. The mechanism is direct.
The relationship is complex. At stable levels, oestrogen upregulates inhibitory mast cell receptors, exerting a stabilising effect on the system. But what perimenopause creates is not simple decline. It creates fluctuation coupled with decline. Oestrogen oscillates while progesterone falls earlier and more steeply. Progesterone is a direct mast cell stabiliser in its own right.
What emerges is a window where the mast cell stabilisation system loses its most reliable support precisely when the proprioceptive system is already demanding more nervous system resources to maintain coherence.
These mechanisms are established in vitro and in animal models. Their clinical significance in women with hEDS-MCAS-neurodivergence has not been formally tested in controlled studies. But the clinical pattern is unmistakeable among women with this presentation: decades of compensation become visible. Symptoms that had been present and manageable become undeniable.
The buffer is reduced.
For many women, this is when everything becomes clear. This is when the pattern can no longer be missed.
What this actually is
We have spent decades cataloguing what is wrong with these bodies. The instability. The reactivity. The symptoms that don’t fit single diagnoses. The appointments where the observations were real but the framework kept failing.
The sensitivity is not the problem. The sensitivity is the range.
The early warning is not a failure. It is a feature. A super power.
These are not broken bodies with too many things wrong. They are bodies with a different processing architecture. Built to read what others miss. Functioning exactly as designed in the right environment.
The wrong environment makes them sick. Not because the body is fragile, but because the environment is hostile.
What would it mean to take this seriously. To design spaces that buffer rather than amplify. To understand that the quiet, the soft light, the consistent materials, the cleared surfaces, the acoustic refuge are not preferences or accommodations. They are physiology.
That the person who feels everything is not too sensitive for the world. They are too sensitive for this particular version of it.
The medicine is not correcting the body. It is understanding what the body already is.
References
Hypermobility-Neurodivergence Association: Csecs, G., et al. (2022). Neurodiversity and generalised joint hypermobility. Frontiers in Psychiatry, 13, 1017735.
Genetic Architecture: TPSAB1 duplications in dysautonomia and hypermobility: Castori, M., et al. (2017). Management of the joint hypermobility disorders. American Journal of Medical Genetics, 175(1).
Neuroimaging: Enhanced insula activation in hypermobility: British Journal of Psychiatry, 2024.
Neuroarchitecture: Valentine, C., et al. (2023-2026). Architectural design and neurophysiological stress. British Journal of Psychiatry.
Neurodivergent Design Standards: PAS 6463:2022. Specification for designing built environments for neurodivergent people.
This essay integrates human clinical research, animal model studies, and observational data. Mechanisms demonstrated in animals and cells are marked as such. Human neuroimaging findings are reported as observed. Theoretical frameworks are presented as coherent but not yet experimentally proven. The evolutionary hypothesis is reasoning from multiple pieces of evidence, not established science. Clinical observations are reported as consistent patterns observed across many presentations but not yet formally studied in controlled research.