THIS is YOUR BRAIN on AUTOPILOT

PRACTICE PRACTICE
https://journals.sagepub.com/doi/full/10.1177/00187208231201054
https://medicalxpress.com/skill-automatic-brain-rewires-bypass
A skill becomes automatic as the brain rewires itself to bypass its own bottleneck, new study suggests
by Sanjukta Mondal / July 29, 2026

“Riding a bike, reading a book or folding laundry while watching TV can feel effortless, almost like your brain does it on autopilot. This ease comes from repetition, built through practicing the same task again and again. The prefrontal cortex (PFC), responsible for flexible thinking and decision-making, plays a role in this process, but it also creates a bottleneck. Although highly flexible, it can generally handle only one decision at a time, making multitasking difficult. In a recent study, researchers wanted to understand how the brain changes when a person practices a specific task until it reaches cognitive automaticity. In this state, familiar actions can be performed quickly and efficiently with little conscious effort. After sorting morphed car images more than 30,000 times, participants didn’t just get better at the task.

“After extensive training, fMRI-RA identified regions in occipito-temporal cortex with categorical response profiles. Credit: Journal of Cognitive Neuroscience (2026). DOI: 10.1162/jocn.a.2618

Their brains rewired themselves, shifting the work from slow, deliberate thinking to fast, effortless autopilot. The brain’s vision center, the vOTC (ventral occipito-temporal cortex), originally just recognized shapes, but with enough practice, it learned to make the categorization decisions itself. As the vision center could now handle the decision alone, it no longer needed constant guidance from the PFC. The two regions disengaged, and perception took over the job that thinking used to do. The findings are published in the Journal of Cognitive Neuroscience.

“The trained visual region became less connected to prefrontal cortex and more connected to motor-related areas.” Credit: Journal of Cognitive Neuroscience (2026). DOI: 10.1162/jocn.a.2618

How practice shifts the brain to autopilot
We categorize objects constantly, from recognizing a friend’s face to sorting colors. Yet, most brain research on this skill only captures a few hours of practice in a lab, whereas real-world expertise takes months or years to hone the skills we rely on daily. Despite its importance, scientists still don’t fully understand how extensive practice reshapes the brain’s categorization system. Earlier studies have shown that, under normal circumstances, the brain follows a two-stage process for categorization.

First, the brain’s visual areas identify an object’s shape. Then the prefrontal cortex steps in to decide which category that shape belongs to. The prefrontal cortex relies on cognitive control to keep the brain focused on the right task, but it can generally only handle one decision at a time. This creates a frontal bottleneck, so when you try to multitask, the two tasks interfere with each other. However, once a task becomes automatic through practice, it no longer needs the prefrontal cortex watching over it, so it avoids the traffic jam. The researchers hypothesized that extensive practice builds a perception-action loop, letting the brain skip the frontal bottleneck altogether. The prefrontal cortex teaches the visual system to recognize categories, then steps aside as the brain links what the eyes see directly to the motor regions of the brain.

“EEG-RA clustering analyses on the PRE-EXT training timepoint support a two-stage model of categorization, with a categorical feedback signal.” Credit: Journal of Cognitive Neuroscience (2026). DOI: 10.1162/jocn.a.2618

Mapping practice in the brain
To test this hypothesis, researchers conducted a long-term study to track how the brain changes as a task moves toward automaticity. Over the course of 5–10 weeks, 11 participants practiced the car-categorization task for more than 30,000 trials, learning to categorize images of morphed cars into two groups with made-up names: SOVOR and ZUPUD. To see how practice rewired the brain, the researchers tracked both the where and the when of brain activity. fMRI (functional magnetic resonance imaging) revealed which regions were involved, while EEG (electroencephalogram) captured the split-second timing of their signals. They repeated these measurements alongside behavioral tests at different stages of the training.

They found that extensive practice taught the visual areas to handle these category decisions themselves, allowing the brain to offload the work from the prefrontal cortex. The MRI also showed that the visual areas unplugged from the prefrontal cortex and formed new, stronger connections directly to the motor areas. The most significant result of this rewiring was a dramatic improvement in multitasking. Since the practiced task no longer needed the limited resources of the prefrontal cortex, people could perform it alongside another attention-demanding task without any interference. In terms of behavior, the participants reached high accuracy quickly, while their reaction times continued to drop with practice.

Becoming faster without making more mistakes, alongside physical changes in the brain, showed that the task had become automatic and no longer depended on the brain’s usual bottleneck. These findings could help design training programs for jobs that require fast visual judgment, like radiology, security screening or industrial inspection. The researchers point out that the speed and automation acquired through practice come with a trade-off. Automatic skills are fast, but they are less flexible than when the prefrontal cortex was in charge of the decision, so they may struggle if the rules suddenly change. Future research needs to clarify whether, and how, the brain can overcome this rigidity.”

Publication details
Patrick H. Cox et al, Extensive Experience Remodels Neural Task Circuitry to Escape the Frontal Bottleneck and Increase Automaticity of Categorization, Journal of Cognitive Neuroscience (2026). DOI: 10.1162/jocn.a.2618

DEFAULT MODE
https://scitechdaily.com/your-brain-is-on-autopilot-two-thirds-of-the-day
https://newscientist.com/autopilot-mode-is-real
Your autopilot mode is real – now we know how the brain does it
by Jessica Hamzelou / 23 October 2017

“Ever realised you have driven yourself home but haven’t really been paying attention? Brain scans have revealed that when your mind wanders, it switches into “autopilot” mode, enabling you to carry on doing tasks quickly, accurately and without conscious thought. Our autopilot mode seems to be run by a set of brain structures called the default mode network (DMN). It was discovered in the 1990s, when researchers noticed that people lying in brain scanners show patterns of brain activity even when they aren’t really doing anything. This research provided the first evidence that our brains are active even when we aren’t consciously putting our minds to work.

But what does the DMN do? Several studies have found that it seems to be involved in assessing past events and planning for the future. Others suggest the network is involved in self-awareness – although this has been called into question by findings that rats and newborns appear to have a version of the DMN too. It is unlikely that rats are conscious of themselves in the same way that humans are, says Deniz Vatansever at the University of York, UK. Instead, the DMN must have a more basic function, common to all animals. Vatansever and his colleagues at the University of Cambridge wondered if the network might help us do things without paying much attention, such as tying our shoelaces, or driving along a familiar road.

To investigate, the researchers asked 28 volunteers to learn a card game while lying in an fMRI brain scanner. In the game, each person was presented with four cards. They were then given a fifth, and asked to match it to one of the four. But participants were not told the rules – they didn’t know whether to match the cards by colour or shape, for example. Through trial and error, each person figured it out after a few rounds. While this happened, their brain activity resembled patterns that are typical of learning minds. But as the game continued, and the participants knew how to match the cards without much thinking, their brain activity resembled those of using the DMN – and their responses became faster and more accurate. This suggests that when we “switch off”, our brains go into an autopilot mode that allows us to perform tasks reasonably without thinking much about them. This might also help explain why some tasks – such as playing a well-known tune on a musical instrument – suddenly seem much more difficult when you go from doing them absent-mindedly to consciously thinking about them.

Boost your autopilot
In the experiment, people whose DMN structures are more strongly connected also performed better in the card game. In these people, the various regions fired together more consistently, showing more coordinated activity. This suggests that the more strongly a person’s DMN is linked up, the more effective their autopilot mode, says Vatansever. It may be possible to train yourself to have a better autopilot mode. In other studies, people have been able to control their brain activity when shown real-time scans of their brains. Similar “neurofeedback” training may enable people to boost their brain’s autopilot mode, allowing them to perform better on tasks without directly focusing on them, says Paul Stillman at Ohio State University.”

PNAS DOI: 10.1073/pnas.1710521114

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