Pull a thread with me · Early development
How might early monotropic attention shape the autistic mind?
This is a thread: my current understanding, built from the science but not yet fully settled. Tap any Hey Dr. B! line for the science behind it.
Emerging research shows differences in the brain networks that regulate the body’s resources and direct attention emerge long before any autistic traits can be detected. Starting from the very beginning, this processing difference changes how sensory channels integrate and how the dance of development unfolds. And it might explain why monotropic minds may need to rely more on bottom-up sensory processing, and why that might predispose them to neuroinflammation and other inflammatory hits.
How might early monotropic focus shape every developmental step that follows?
In young minds, attention is pulled, not chosen
Older children and adults can sometimes steer attention with effort: sit through a dull lesson, practice a skill they don’t yet enjoy, memorize for a test. Infants, toddlers and even preschoolers cannot. Their attention follows what fascinates, what moves, what lights up their nervous system. For a polytropic mind, these are gentle preferences. For a monotropic mind, they are strong currents.
What lies outside the beam may wait
Imagine a young monotropic thinker exploring a peach for the first time – fascinated by the fuzzy skin, the way it yields under pressure. How much processing energy remains to also hear mom say “peach”? And to link object, sensation, word and meaning?
Hey Dr. B! What do you mean by processing energy?
Every act of noticing, making sense of something and responding to it is paid for in cellular energy, mostly ATP made by mitochondria. The brain is only about two percent of body weight but uses around twenty percent of the body’s energy at rest, and that budget is shared with everything else the body has to do. So when a young mind pours its resources into one fascinating thing, there is simply less left over for whatever else is happening in the room.
Draft, to be replaced with my own wordsAttention builds the brain
Neurons that fire together, wire together. Repeat a pattern enough, through attention and practice, and you build architecture. In early childhood, when neuroplasticity is at its peak, attention doesn’t just accompany development – it drives it. And for a monotropic mind, where the pull is strongest, the effect should be even more pronounced.
Hey Dr. B! What does “neurons that fire together, wire together” mean?
This is Hebbian learning, named for Donald Hebb. When two neurons are repeatedly active at the same time, the connection between them gets stronger, so the next time one fires, the other is more likely to follow. Repeated attention is how patterns get practiced, and practiced patterns become physical architecture: thicker connections, pruned alternatives. In early childhood this process is at its fastest, which is why what a young mind attends to shapes the brain it builds.
Draft, to be replaced with my own wordsWhere attention flows, both sensitivity and strength take root.And where attention doesn’t flow, development waits for a different moment.
Hey Dr. B! The science
The science behind the thread, explained in a way that represents my best and most current medical understanding now.
Hey Dr. B! What do you mean by processing energy?
Every act of noticing, making sense of something and responding to it is paid for in cellular energy, mostly ATP made by mitochondria. The brain is only about two percent of body weight but uses around twenty percent of the body’s energy at rest, and that budget is shared with everything else the body has to do. So when a young mind pours its resources into one fascinating thing, there is simply less left over for whatever else is happening in the room.
Draft, to be replaced with my own words
Hey Dr. B! What does “neurons that fire together, wire together” mean?
This is Hebbian learning, named for Donald Hebb. When two neurons are repeatedly active at the same time, the connection between them gets stronger, so the next time one fires, the other is more likely to follow. Repeated attention is how patterns get practiced, and practiced patterns become physical architecture: thicker connections, pruned alternatives. In early childhood this process is at its fastest, which is why what a young mind attends to shapes the brain it builds.
Draft, to be replaced with my own words
The references
Where the ideas above come from. Read them, push on them, and tell me what you find.
- Breon, A. (2026). How early attention shapes the autistic mind. aliabreonMD (Substack). aliabreonmd.substack.com/p/how-early-attention-shapes-the-autistic
- Murray, D., Lesser, M. & Lawson, W. (2005). Attention, monotropism and the diagnostic criteria for autism. Autism, 9(2), 139–156.
- Hebb, D. O. (1949). The Organization of Behavior: A Neuropsychological Theory. Wiley.
- Menon, V. & Uddin, L. Q. (2010). Saliency, switching, attention and control: a network model of insula function. Brain Structure and Function, 214, 655–667.
- Liu, J. et al. (2024). Salience-network differences in infants later diagnosed autistic, detectable by six weeks of age. Communications Biology, 7. doi:10.1038/s42003-024-06016-9to confirm