Autism and EDS/Hypermobility

Autistic Mirror (Inner View)

Yes, there is a clear connection. Studies show that autistic people are approximately 3-4x more likely to have hypermobile joints than the general population. The correlation is so strong that some researchers assume a shared neurological basis.

The connection manifests on multiple levels:

Proprioception is compromised in both conditions. Proprioception is your sense of where your body parts are in space. With EDS, joints are unstable; with autism, sensory processing works differently - together, this often creates significant uncertainty about your own body position.

Sensory budget: Chronic pain from EDS constantly consumes processing capacity. Your brain must permanently filter pain signals and maintain compensatory muscle tension. This reduces the available capacity for other sensory processing - overload happens faster. Overload means too many stimuli need to be processed simultaneously and the system becomes overwhelmed.

The exhaustion compounds: autistic processing requires more energy, and EDS compensation (constant muscle tension to stabilise unstable joints) does too. This explains why many people with both diagnoses report extreme fatigue.

Interoception - the perception of internal body signals - is also different in both conditions. Autistic brains often perceive hunger, thirst, or the urge to urinate with a delay. EDS can further obscure these signals through chronic pain.

The research is still young, but the clustering is too pronounced for coincidence. Many late-diagnosed individuals report receiving one diagnosis first, then the other.

Autistic Mirror (Inner View)

Probably both - they amplify each other.

With EDS, your joints send unreliable position data. The connective tissue that normally provides precise feedback about joint positions is too stretchy. Your brain receives imprecise information: "elbow is somewhere between 45 and 65 degrees bent" instead of "elbow is at 55 degrees."

Autistic brains process this imprecise data differently. Predictive coding - your brain constantly compares expectations with what actually happens. With imprecise input data, prediction becomes harder. Where neurotypical brains would work with estimates, your brain tries to calculate precisely - with imprecise data.

Judging distances has another layer: many autistic people process visual depth differently. The integration of 2D images into 3D spatial perception does not happen automatically. Combined with the unreliable joint data, this creates double uncertainty - visual AND proprioceptive.

The constant bumping into things is not carelessness. Your brain is working with two sets of unreliable data (joint position from EDS, spatial processing from autism) and must permanently compensate. This costs enormous processing capacity.

Some people find compression clothing helpful - it provides additional proprioceptive feedback through pressure on the skin. Deliberate "body scanning" before movements can also help, but is energy-intensive.

Autistic Mirror (Inner View)

Research does not yet have a definitive answer, but there are several promising hypotheses.

Shared genetic basis: Both conditions show familial clustering. The same genes may influence both connective tissue structure and neurological development. Collagen (the main component of connective tissue) also plays a role in the brain - in synapse formation and nerve insulation.

Developmental biological connection: The nervous system and connective tissue develop embryonically from adjacent cell layers (ectoderm and mesoderm). Early developmental processes affecting one layer could also affect the other.

The most interesting hypothesis concerns GABAergic signalling. GABA is the most important inhibitory neurotransmitter in the brain. In autistic people, the balance between excitatory and inhibitory signals works differently. But GABA receptors exist not only in the brain - they are also found in connective tissue cells. Altered GABA function could influence both neurological processing and connective tissue structure.

Some researchers also hypothesise an evolutionary advantage: the combination of detailed perception (autism) and increased flexibility (hypermobility) could have been beneficial in certain environments.

What we know for certain: the overlap is too frequent for coincidence. Around 50% of people with EDS show autistic traits, and hypermobility is 3-4x more common in autistic people than in the general population. The connection is real - we just do not yet fully understand why.